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Alkali metals
1. As compared to potassium, sodium has [MP PMT 1985]
(a) Lower electronegativity
(b) Higher ionization potential
(c) Greater atomic radius
(d) Lower melting point
2. Potassium is kept in [CPMT 1976]
(a) Alcohol (b) Water
(c) Kerosene (d) Liquid ammonia
3. The product obtained on fusion of 4
BaSO and
2 3
NaCO is
[AFMC 2005]
(a)
3
BaCO
(b) BaO
(c)
2
Ba ( OH ) (d)
4
BaHSO
4. Which of the following statement is correct
regarding alkali metals [NCERT 1981]
(a) Cation is less stable than the atom
(b) Cation is smaller than the atom
(c) Size of cation and atom is the same
(d) Cation is greater in size than the atom
5. Valency electrons in alkali metals are [CPMT 1972]
(a) 1 (b) 7
(c) 4 (d) 2
6. Magnitude of which of the following property of
alkali metals increases with the increase of
atomic number
[MP PMT 1987]
(a) Electronegativity (b) Ionic radius
(c) First ionization energy (d) Melting point
7. As compared to lithium, sodium reacts quickly
with water because [NCERT 1978, 80]
(a) Its molecular weight is less
(b) It is stronger electronegative
(c) It is stronger electropositive
(d) It is a metal
8. Which is an ore of potassium
[DPMT 1984; CPMT 1986; Kurukshetra CEE 1998]
(a) Carnellite (b) Cryolite
(c) Bauxite (d) Dolomite
2 3
NaCO
can be manufactured by Solvey's process
but
2 3
KCO cannot be prepared because [MP PMT 1993]
(a)
2 3
KCO is more soluble
(b)
2 3
KCO is less soluble
(c)
3
KHCO is more soluble than
3
NaHCO
(d)
3
KHCO is less soluble than
3
NaHCO
10. Which of the following alkali metals is smallest in
size
[CPMT 1990]
(a) Rb (b) K
(c) Na (d) Li
11. When potassium dichromate crystal are heated
with conc. HCl [DCE 1999]
(a)
2
O is evolved
(b) Chromyl chloride vapours are evolved
(c)
2
Cl is evolved
(d) No reaction takes place
12. Which of the following does not illustrate the
anomalous properties of lithium [MP PET 1993]
(a) The melting point and boiling point of Li
are
comparatively high
(b) Li
is much softer than the other group I
metals
(c) Li
forms a nitride LiN
3
unlike group I metals
(d) The ion of Li and its compounds are more
heavily hydrated than those of the rest of the
group
13. Correct order of increasing activity is
(a) Cu , Mg , Na (b) Na , Mg , Cu
(c) Mg , Na , Cu (d) Cu , Na , Mg
14. On heating anhydrous
2 3
NaCO , ........ is evolved
[CPMT 1971, 79]
(a)
2
CO (b) Water vapour
(c) CO (d) No gas
15. Chile saltpetre is [DPMT 1984; CPMT 1986, 89;
CET Pune 1998; MP PMT 2003]
(a)
3
NaNO
(b)
2 4
NaSO
(c)
3
KNO (d)
2 3
NaSO
16. A mixture of KCl and KF is added to sodium
chloride
(a) To increase the conductivity of NaCl
(b) To decrease the melting point of NaCl
(c) To supress the degree of dissociation of NaCl
(d) To decrease the volatility of NaCl
17. A well known reagent which contains copper
sulphate, sodium potassium tarterate and sodium
hydroxide is
(a) Fenton's reagent (b) Schiff's reagent
(c) Fehling's solution (d) Nessler's reagent
18. Sodium metal can be stored under
[CPMT 1972, 85; BHU 1983]
(a) Benzene (b) Kerosene
(c) Alcohol (d) Toluene
19. The most dangerous method of preparing
hydrogen would be by the action of HCl and [JIPMER 2000]
(a) Al (b) K
(c) Fe (d) Zn
20. Based on lattice energy and other considerations
which one of the following alkali metal chlorides
is expected to have the highest melting point [AIEEE 2005]
(a) LiCl (b) NaCl
(c) KCl (d) RbCl
21. The correct formula of hypo is
(a) Na SO HO
2 2 3 2
. 5 (b)
2 4
NaSO
(c) Na SO HO
2 2 3 2
. 4 (d) Na SO HO
2 2 3 2
22. The reagent commonly used to determine
hardness of water titrimetrically is [AIIMS 2003]
(a) Oxalic acid
(b) Disodium salt of EDTA
(c) Sodium citrate
(d) Sodium thiosulphate
2 3
KCS can be called potassium [CPMT 1972, 74]
(a) Thiocyanate (b) Thiocarbonate
(c) Thiocarbide (d) Sulphocyanide
24. Which is most basic in character [BHU 1982]
(a) RbOH
(b) KOH
(c) NaOH (d) LiOH
25. When washing soda is heated [AFMC 2005]
(a) CO is released
(b)
2
CO CO
is released
(c)
2
CO is released
(d) Water vapour is released
26. Which of the following is correct [CPMT 1971]
(a) All carbonates are soluble in water
(b) Carbonates of
Na , K and
4
NH are soluble in
water
(c) Carbonates of Ca , Sr , Ba are soluble in water
(d) All carbonates are insoluble
27. Nitre is [CPMT 1986]
(a)
3
AgNO (b)
3
KNO
(c)
4 3
NHNO (d)
3
NaNO
28. Nelson cell is used for the preparation of
[CPMT 1985]
(a) Slaked lime (b) Baryta
(c) Sodium (d) Caustic soda
29. Potash alum is a [CPMT 1986; MNR 1981]
(a) Complex salt (b) Acid salt
(c) Double salt (d) Normal salt
30. The process of industrial manufacturing of
sodium carbonate is known as [CPMT 1978, 86; MP PMT 1995]
(a) Castner process (b) Haber's process
(c) Le-blanc process (d) Chamber process
31. The colour of hydrogen is [IIT 1980]
(a) Black (b) Yellow
(c) Orange (d) None of these
32. Which one of the following salts gives aqueous
solution which is weakly basic [Bihar CEE 1995]
(a)
3
NaHCO (b)
4
NaHSO
(c) NaCl
(d)
4 3
NH HCO
33. An example for a double salt is [KCET 2002]
(a) Silver nitrate (b) Mohr's salt
(c) Potassium ferricyanide (d)Cupromonium sulphate
34. The elements of group IA provide a colour to the
flame of Bunson burner due to [AIIMS 1987]
(a) Low ionization potential
(b) Low melting point
(c) Softness
(d) Presence of one electron in the outermost
orbit
35. Which of the following is the smallest cation
[MP PMT 1993]
(a)
Na (b)
2
Mg
(c)
2
Ca (d)
3
Al
36. K , Ca and Li metals may be arranged in the
decreasing order of their standard electrode
potentials as [CPMT 1990]
(a) K , Ca , Li (b) Li , K , Ca
(c) Li ,
Ca , K (d)
Ca , Li , K
37. Alkali metals lose electrons in [CBSE PMT 1990]
(a) s - orbitals (b) p - orbitals
(c) d - orbitals (d) f - orbitals
38. The alkali metal that reacts with nitrogen directly
to form nitride is [Roorkee 1992; MP PMT 2000; BHU 2000]
(a) Li
(b) Na
(c) K (d) Rb
39. Which of the following has density greater than
water
[MP PET 1994]
(a) Li (b) Na
(c) K (d) Rb
40. The reactivity of the alkali metal sodium with
water, is made use of [MP PMT 1994]
(a) In drying of alcohols
(b) In drying of benzene
(c) In drying of ammonia solution
(d) As a general drying agent
41. Which of the following has smaller size
[RPET 2003]
(a) H (b)
He
(c)
2
1
H (d)
2
Li
(c)
2
NaBO
(d)
2 3
NaBO
62. When sodium dicarbonate is heated strongly for
calcined in a kiln, it forms [CPMT 2000; KCET (Med.) 2000]
(a) Na (b)
2 3
NaCO
(c)
3
NaCO (d)
3
NaHCO
63. The strongest reducing agent is [MP PET 2001]
(a) K (b) Al
(c) Mg (d) Br
64. The word 'alkali' is used for alkali metals
indicates
[RPMT 1999]
(a) Ash of the plants (b) Metallic nature
(c) Silvery lusture (d) Active metal
65. Potassium nitrate is called [RPMT 1999]
(a) Mohr's salt (b) Gypsum
(c) Indian salt petre (d) Chile salt petre
66. Which of the following chemicals, in addition to
water, are used for the manufacture of
2 3
NaCO
by
Solvay process
[Roorkee 1999]
(a) NaCl , CO and
3
NH
(b)
2
NaCl , CO and
3
NH
(c) NaCl NHCl
4
, and
2
CO
(d) NaHCO , CO
3
and
3
NH
67. Which metal forms amide with
3
NH
at C
o
300
[CPMT 1994]
(a) Mg (b) Pb
(c) Al (d) Na
68. When sodium is heated with moist air, then the
product obtained is [AIIMS 1999]
(a) NaO
2
(b) NaOH
(c)
2 3
NaCO
(d)
2 2
NaO
69. An inorganic compound first melts then
resolidifies and then liberates a gas. It may be [DPMT 2002]
(a)
2
MnO (b)
2 3
AlO
(c)
4
KMnO (d)
3
KClO
70. On dissolving moderate amount of sodium metal
in liquid
3
NH at low temperature, which one of
the following does not occur [AIIMS 2003]
(a) Blue coloured solution is obtained
(b)
Na ions are formed in the solution
(c) Liquid
3
NH becomes good conductor of
electricity
(d) Liquid ammonia remains diamagnetic
71. The solubility of the alkali metal carbonates
[Pune CET 1998]
(a) Increases at first and then decreases
(b) Does not show regular variation
(c) Increases as we go down the group
(d) Decreases as we go down the group
72. Which of the following properties is not true for
an alkali metal [Pune CET 1998]
(a) Low atomic volume
(b) Low ionization energy
(c) Low density
(d) Low electronegativity
73. Which of the following alkali metals has the
biggest tendency for the half reaction,
M ( g ) M ( aq ) e [DPMT 2001]
(a) Lithium (b) Sodium
(c) Cesium (d) Potassium
74. Which one of the following metalic hydroxides
does not dissolve in sodium hydroxide solution [KCET (Med.) 2001]
(a)
2
Zn ( OH ) (b)
3
Al ( OH )
(c)
3
Fe ( OH ) (d)
2
Pb ( OH )
75. Which one of the following on heating will not
give
2
CO
[NDA 1999; BHU 2000]
(a)
3
CaCO (b)
2 3
NaCO
(c)
3
PbCO (d)
2 3
LiCO
76. NaOH is prepared by the method [AFMC 2005]
(a) Down’s cell (b) Castner cell
(c) Solvay process (d) Castner Kellner cell
77. Sodium gives blue colour with
3
NH solution, this
blue colour is due to
[UPSEAT 2000,02; AMU 2002; RPMT 2002]
(a) Ammoniated
Na (b) Ammoniated
Na
(c) Ammoniated
e (d)
Na / Na pair
78. The strongest reducing agent of the alkali metal is
[CPMT 1999; Pb.CET 2001]
(a) Li (b) Na
(c) K (d) Cs
79. With the increase in atomic weights, melting
points of the alkali metals [MP PMT 1995]
(a) Increase
(b) Decrease
(c) Remain constant
(d) Do not show definite trend
80. The reaction of water with sodium and potassium
is
[BHU 1999]
(a) Exothermic
(b) Endothermic
(c) Reversible
(d) Irreversible and endothermic
81. When potassium ferrocyanide crystals are heated
with concentrated sulphuric acid, the gas evolved
is
[CBSE PMT PMT 1999; KCET 2000]
(a) Ammonia (b) Sulphur dioxide
(c) Carbon dioxide (d) Carbon monoxide
82. Characteristic feature of alkali metals is
[ RPMT 2000; MP PMT 2004]
(a) Good conductor of heat and electricity
(b) High melting points
(c) Low oxidation potentials
(d) High ionization potentials
83. A substance X is a compound of an element of
group IA the substance X gives a violet colour in
flame test, X is
[MP PMT 1980, 85, 86; CPMT 1985; DCE 2000]
(a) LiCl (b) NaCl
(c) KCl (d) None
84. Which of the following alkali metal ions has
lowest ionic mobility in aqueous solution [KCET 2000]
(a)
Rb (b)
Cs
(c)
Li (d)
Na
85. Lithium shows similarities to magnesium in its
chemical behaviour because [Pb. PMT 2000]
(a) Similar size, greater electronegativity and
similar polarizing power.
(b) Similar size same electronegativity and lower
polarizing power
(c) Similar size, same electronegativity and
similar high polarizing power
(d) None of these
86. Which one of the following is the most
electropositive element [Pb. PMT 2000]
(a) Calcium (b) Chlorine
(c) Potassium (d) Carbon
87. Electrolysis of molten sodium chloride leads to
the formation of [KCET 1990]
(a) Na and
2
H (b) Na and
2
O
(c)
2
H and
2
O (d) Na and
2
Cl
88. When sodium bicarbonate is heated the product
obtained is
[Pb. CET 2000; DCE 2004]
(a) Na (b)
2 3
NaCO
(c)
3
NaCO (d) ( )
2 3
Na HCO
89. Which of the following is a use of alum [CPMT 2004]
(a) Making explosives (b) Bleaching clothes
(c) Water softening (d) All of the above
90. Which of the following salt does not get
hydrolysed in water
[CPMT 2004]
(a)
4
KClO (b) NH Cl
4
(c) CHCOONa
3
(d) None of these
91. A fire of lithium, sodium and potassium can be
extinguished by [DCE 2003]
(a) HO
2
(b) Nitrogen
(c)
2
CO
(d) Asbestos blanket
92. Which of the following metal has stable
carbonates
[AFMC 2004]
(a) Na (b) Mg
(c) Al (d) Si
93. Aluminium reacts with caustic soda to form [DCE 2004]
(a) Aluminium hydroxide
(b) Aluminium oxide
(c) Sodium meta-aluminate
(d) Sodium tetra aluminate
94. Alkaline earth metals are denser than alkali metals,
because metallic bonding in alkaline earth's metal,
is [BHU 2004]
(a) Stronger (b) Weaker
(c) Volatile (d) Not present
95. Which of the following is a false statement [CPMT 2004]
(a) Fluorine is more electronegative than chlorine
(b) Nitrogen has greater
1
IEthan oxygen
(c) Lithium is amphoteric
(d) Chlorine is an oxidising agent
96. Which is most basic in character [UPSEAT 2004]
(a) CsOH (b) KOH
(c) NaOH (d) LiOH
97. Photoelectric effect is maximum in [AFMC 2004]
(a) Cs (b) Na
(c) K (d) Li
98. A metal M reacts with
2
N to give a compound ' A '
3
MN. ' A ' on heating at high temperature gives
back ' M ' and ' A ' on reacting with HO
2
gives a gas
' B '. ' B ' turns
4
CuSO solution blue on passing
through it. A and B can be [DCE 2003]
(a) Al and
3
NH (b) Li and
3
NH
(c) Na and
3
NH
(d) Mg and
3
NH
99. A solid compound ' X ' on heating gives
2
CO gas
and a residue. The residue mixed with water
forms ' Y '. On passing an excess of
2
CO through ' Y '
in water, a clear solution, ' Z ' is obtained. On
boiling ' Z ', compound ' X ' is reformed. The
compound ' X ' is [CBSE PMT 2004]
(a)
2 3
NaCO (b)
2 3
KCO
(c)
3 2
Ca ( HCO ) (d)
3
CaCO
100. mongst
2
LiCl , RbCl , BeCl and
2
MgCl the compounds
with the greatest and least ionic character
respectively are
121. Baking soda is [CPMT 1974, 78, 79, 91;
BHU 1979; Manipal MEE 1995; AIIMS 1996;
CPMT 1973; RPET 1999; AFMC 2001, 05; Pb. CET 2002]
(a)
2 3
NaCO (b)
3
NaHCO
(c)
2 4
NaSO
(d)
2 3
KCO
122. Soda ash is [KCET 1993]
(a) Na CO HO
2 3 2
. (b) NaOH
(c)
2 3
NaCO
(d)
3
NaHCO
123. Soda lime is [KCET 1993]
(a) NaOH (b) CaO
(c) NaOH and CaO (d)
2 3
NaCO
124. Molten sodium is used in nuclear reactors to [KCET 1989]
(a) Absorb neutrons in order to control the chain
reaction
(b) Slow down the fast neutrons
(c) Absorb the heat generated by nuclear fission
(d) Extract radio-isotopes produced in the reactor
125. Squashes are stored by adding [AFMC 1989]
(a) Citric acid (b) KCl
(c)
2 3
NaSO (d) Sodium
metabisulphite
126. Sodium thiosulphate (. 5 )
2 2 3 2
NaSO HO is used in
photography to [CPMT 1972, 74, 79;
DPMT 1983; Bihar CEE 1995; MNR 1995]
(a) Reduce silver bromide to metallic silver
(b) Convert metallic silver to silver salt
(c) Remove undecomposed AgBr as a soluble
silver thiosulphate complex
(d) Remove unreduced silver
127. Which of the following pair can't exist in solution
[IIT 1986; DCE 1999]
(a)
3
NaHCO
and NaOH
(b)
2 3
NaCO
and NaOH
(c)
2 3
NaCO and NaCl (d)
3
NaHCO and NaCl
128. Sodium thiosulphate is prepared by [IIT 1996]
(a) Reducing
2 4
NaSO solution with HS
2
(b) Boiling
2 3
NaSO solution with S in alkaline
medium
(c) Neutralising
2 2 3
HSO solution with NaOH
(d) Boiling
2 3
NaSO solution with S in acidic
medium
129. When NaOH is prepared, the gas released is [CPMT 1996]
(a)
2
Cl (b)
2
H
(c)
2
O (d) H O
2
130. What is lye [BHU 1997]
(a) 10% solution of NaCl
(b) 10% solution of KOH
(c) 10% solution of
2
Ca ( OH )
(d) 10% solution of
2 3
NaCO
131. Na imparts yellow colour to Bunsen flame
because of
[RPMT 1997]
(a) Low ionisation potential
(b) Sensitivity
(c) Sublimation
(d) Absorbed high radiation
132. Sn is dissolved in excess of NaOH solution, the
compound obtained is [RPMT 1997]
(a)
2
Sn ( OH ) (b)
2 3
NaSnO
(c)
2 2
NaSnO (d)
2
SnO
133. Identify the correct statement [CPMT 1997]
(a) Elemental sodium can be prepared and
isolated by electrolysing an aqueous solution
of sodium chloride
(b) Elemental sodium is a strong oxidizing agent
(c) Elemental sodium is insoluble in ammonia
(d) Elemental sodium is easily oxidized
134. Calcium is obtained by [CBSE PMT 1997]
(a) Roasting of limestone
(b) Electrolysis of solution of calcium chloride in
H O
2
(c) Reduction of calcium chloride with carbon
(d) Electrolysis of molten anhydrous calcium
chloride
135. When sodium chloride solution is electrolysed,
the gas that is liberated at the cathode is [Kurukshetra CEE 1998]
(a) Oxygen (b) Hydrogen
(c) Chlorine (d) Air
136. During the electrolysis of fused sodium chloride,
the anodic reaction is [KCET 1998]
(a) Reduction of sodium ions
(b) Oxidation of sodium ions
(c) Reduction of chloride ions
(d) Oxidation of chloride ions
137. Which of the following does not participate in the
Solvey's process for the manufacture of
2 3
NaCO [EAMCET 1998]
(a)
3
NH (b) NaCl solution
(c)
2
CO
(d)
2 4
H SO
138. The colour of the precipitate produced by adding
NaOH solution to
2
HgCl is [KCET 1998]
(a) Yellow (b) Black
(c) Brown (d) White
139. The cell used for the electrolysis of fused NaCl is
[AFMC 1999; Kerala (Mea.) 2002]
(a) Down’s cell (b) Castner cell
(c) Solvay cell (d) Nelson cell
140. Slaked lime[ ( )] 2
CaOH is used in the manufacture
[UPSEAT 2000]
(a) Cement (b) Fire bricks
(c) Pigment (d) Medicine
141. The alum used for purifying water is [KCET (Med.) 2001]
(a) Ferric alum (b) Chrome alum
(c) Potash alum (d) Ammonium alum
142. Which one of the following metalic hydroxides
does not dissolve in sodium hydroxide solution [KCET (Med.) 2001]
(a)
2
Zn ( OH ) (b)
3
Al ( OH )
(c)
3
Fe ( OH ) (d)
2
Pb ( OH )
143. In which of the following processes, fused sodium
hydroxide is electrolysed at a C
o
330 temperature
for extraction of sodium [CBSE PMT 2000; AFMC 2001]
(a) Castner’s process (b) Down’s process
(c) Cyanide process (d) Both (b) and (c)
144. Excess of
Na ions in our system causes
[KCET (Med.) 2001]
(a) High B.P. (b) Low B.P.
(c) Diabetes (d) Anaemia
145. Ferric alum has the composition
NH SO Fe SO xHO
4 2 4 2 43 2
( ). ( ). [Orissa JEE 2002]
(a) 7 (b) 24
(c) 6 (d) 15
146. If Na is heated in presence of air, it forms [AFMC 2002]
(a)
2 3
NaCO (b)
2 2
NaO
(c) NaO
2
(d) Both (b) and (c)
147. Which of the following is most reducing agent [RPMT 2002]
(a)
3
HNO (b) Na
(c)
2
Cl (d) Cr
148. Pyrolusite is [DPMT 2002]
(a) Carbonate ore (b) Sulphur ore
(c) Silicon ore (d) None of these
149. In the manufacture of metallic sodium by the
fused salt electrolysis (Down's process) a small
amount of calcium chloride is added to [MP PET 1993; MP PMT 1994]
(a) Improve the electrical conduction
(b) Increase the temperature of electrolysis
(c) Bring down the melt temperature
(d) Stabilize the metallic sodium
150. Sodium metal is extracted by [MP PMT 1996]
(a) Electrolysis of aqueous solution of sodium
chloride
(b) Electrolysis of fused sodium chloride
(c) Heating sodium oxide with carbon
(d) Heating sodium oxide with hydrogen
Alkaline earth metals
1. To remove last traces of water from alcohol, the
metal used is
(a) Sodium (b) Potassium
(c) Calcium (d) Aluminium
2. Plaster of Paris is
[CPMT 1972, 76, 78, 83, 87, 88, 90, 91, 93, 94; JIPMER 2002;
MP PET 1986, 2001; BHU 1992, 95, 2000; MNR 1982; DCE 2000;
Manipal MEE 1995; NCERT 1976; Bihar MEE 1997; EAMCET 1978;
AMU 1982, 84; DPMT 1982, 83]
(a) CaSO HO
4 2
. 2 (b) CaSO HO
4 2
(c) CaSO HO
4 2
. (d) CaSO H O
4 2
2
1
.
3. Which of the following substance is used as
dehydrating agent in laboratory [MP PMT 1987]
(a) Calcium chloride (b) Sodium chloride
(c) Sodium carbonate (d) Potassium nitrate
4. The metal that is extracted from sea water is
[EAMCET 1978; CPMT 1988; CET Pune 1998;
MP PET 2000]
(a) Ba (b) Mg
(c) Ca (d) Sr
5. Which of the following ore contains both
magnesium and calcium [MDAT Bihar 1984; MP PET 2003]
(a) Magnesite (b) Dolomite
(c) Carnellite (d) Phosphorite
6. Epsom salt is
[EAMCET 1978, 80; BHU 1979; MP PET 1999;
CPMT 1988, 89, 90; Bihar MEE 1996]
(a) CaSO HO
4 2
. 2 (b) BaSO HO
4 2
(c) MgSO HO
4 2
(d) MgSO HO
4 2
7. Setting of plaster of paris is [MP PMT 1985; CPMT 1989]
(a) Oxidation with atmospheric oxygen
(b) Combination with atmospheric
2
CO
(c) Dehydration
(d) Hydration to yield another hydrate
8. To prevent magnesium from oxidation in
electrolytic extraction process
(a) Some calcium fluoride is added
(b) Some chlorides are added
(c) Metal is taken out by spoons
(d) The whole process is done in an atmosphere
of coal gas
9. Which of the following metal is found in green
colouring pigment chlorophyll of plants
[KCET 1993; RPMT 1999; MP PET 2002]
(a) Fe (b) Mg
(c) Na (d) Al
10. Which of the following metal carbonate is
decomposed on heating [MNR 1985; MP PET 1994; Pb. CET 2004]
(a)
3
MgCO (b)
2 3
NaCO
(c)
2 3
KCO (d)
2 3
RbCO
(a)
3
MgCO
(b) MgO
(c)
4
MgSO (d)
2
MgCl
30. Mixture of 2
MgCl and MgO is called [DPMT 1984]
(a) Double salt (b) Sorrel cement
(c) Portland cement (d) None of these
31. Lithopone is [AFMC 1992; BHU 1983, 86, 95;
JIPMER 1999; RPET/PMT 1999]
(a)
4
BaO ZnSO (b)
4
ZnO BaSO
(c)
4
BaS ZnSO
(d)
4
ZnS BaSO
32. For bleaching powder, which is incorrect
[EAMCET 1984; CPMT 1985]
(a) Reacts with dilute acid to release chlorine
(b) Oxidising agent
(c) Light yellow coloured powder
(d) Highly soluble in water
33. Bleaching powder is a compound having the
molecular formula
[CPMT 1986, 89, 90, 93; MP PMT 1996; BHU 2005]
(a)
3
CaOCl (b)
2
CaOCl
(c) CaClO (d)
3
CaClO
34. Calcium cynamide is [CPMT 1986, 93]
(a)
2
CaCHNH (b)
2
CaCN
(c)
2 2
CaCN (d)
2
Ca ( CN )
35. Which one of the following is a true peroxide
[RPET 1999; CPMT 1981; Roorkee 1995]
(a)
2
SO (b)
2
BaO
(c)
2
MnO (d)
2
NO
36. Which of the following is not a water absorber
and dehydrating substance [CBSE 1989; JIPMER 2002]
(a) Silica gel (b)
2 5
PO
(c) Conc.
2 4
HSO
(d) Aqueous
2
CaCl
37. The dark red colour of bombs in fireworks is due
to the presence of [Roorkee 1989; DPMT 2001
MP PMT 1985; AFMC 1989; Roorkee 1989]
(a) Na (b) Ba
(c) Sr
(d) K
38. The most electropositive amongst the alkaline
earth metals is
[MP PMT 1993]
(a) Beryllium (b) Magnesium
(c) Calcium (d) Barium
39. Which of the following salts is insoluble in water
at room temperature but soluble in boiling water [MP PMT 1993]
(a)
2
CaCl (b)
2
BaCl
(c)
2
SrCl (d)
2
PbCl
40. Electronegativity of beryllium is approximately
equal to that of
[MP PMT 1993]
(a) Aluminium (b) Boron
(c) Magnesium (d) Sodium
41. The right order of the solubility of sulphates of
alkaline earth metals in water is
[MP PET 1993; Pb. CET 2000; DPMT 2004]
(a) Be Ca Mg Ba Sr
(b) Mg Be Ba Ca Sr
(c) Be Mg Ca Sr Ba
(d) Mg Ca Ba Be Sr
42. Which of the following has highest electrode
potential
[CPMT 1990]
(a) Be (b) Mg
(c) Ca (d) Ba
43. The alkaline earth metals Ba , Sr , Ca and Mg
may be arranged in the order of their decreasing
first ionisation potential as [CPMT 1990]
(a) Mg , Ca , Sr , Ba , (b) Ca , Sr , Ba , Mg
(c) Sr , Ba , Mg , Ca (d) Ba , Mg , Ca , Sr ,
44. Which of the following alkaline earth metals
shows some properties similar to aluminium [BHU 1983]
(a) Be (b) Ca
(c) Sr (d) Ba
45. Which of the following ions forms highly soluble
hydroxide in water [CPMT 1974, 76, 79, 82]
(a)
K (b)
Zn
(c)
Al (d)
Ca
46. Sodium sulphate is soluble in water whereas
barium sulphate is sparingly soluble because [IITJEE 1989]
(a) The hydration energy of
2 4
NaSO
is less than
its lattice energy
(b) The hydration energy of
2 4
NaSO is more than
its lattice energy
(c) The lattice energy of
4
BaSO is more than its
hydration energy
(d) The lattice energy has no role to play in
solubility
47. Which one of the following is most basic [CPMT 1977, 83]
(a)
2 3
AlO (b) MgO
(c)
2
SiO
(d)
2 5
PO
48. Alloys of ...... metal are light and strong and so
are used in the manufacture of aeroplane parts [EAMCET 1978]
(a) Cr (b) Sn
(c) Fe (d) Mg
49. In India at the occasion of marriages, the fire
works used give green flame. Which one of the
following radicals may be present [CPMT 1980; AFMC 1989; MP PMT 200
MP PET 2002]
(a) Na (b) K
(c) Ba (d) Ca
3
CaCO
2
CaO CO reaction in a line goes to
completion because [AFMC 2005]
(a) CaO does not react to
2
CO to give
3
CaCO
(b) Backward reaction is very slow
(c)
2
CO
formed escapes out
(d) None of these
51. The wire of flash bulb is made of [CPMT 1988]
(a) Mg (b) Cu
(c) Ba (d) Ag
52. Bone ash contains [KCET 1992]
(a) CaO (b)
4
CaSO
(c)
3 42
Ca ( PO )
(d)
2 42
Ca ( HPO )
53. A substance absorbs 2
CO and violently reacts
with water. That substance is [AFMC 1988]
(a)
3
CaCO
(b) CaO
(c)
2 4
HSO (d) ZnO
54. Setting of cement is an [DPMT 1984]
(a) Exothermic reaction
(b) Endothermic reaction
(c) Neither exothermic nor endothermic
(d) None of these
55. Which is quick lime [EAMCET 1993]
(a)
2
Ca ( OH )
(b) CaO
(c)
3
CaCO (d) Ca OH HO
2 2
56. A major constituent of portland cement except
lime is
[CPMT 1982]
(a) Silica (b) Alumina
(c) Iron oxide (d) Magnesia
57. Portland cement is manufactured by using [CPMT 1986]
(a) Lime stone, clay and sand
(b) Lime stone, gypsum and sand
(c) Lime stone, gypsum and alumina
(d) Lime stone, clay and gypsum
58. Identify the correct statement [CBSE PMT 1995]
(a) Gypsum contains a lower percentage of
plaster of calcium than plaster of paris
(b) Gypsum is obtained by heating plaster of paris
(c) Plaster of paris can be obtained by hydration
of gypsum
(d) Plaster of paris is obtained by partial
oxidation of gypsum
59. Which of the following decreases on going
gradually from Be to Ba (in periodic table)
(a) Basic character of hydroxides
(b) Solubility of sulphates in water
(c) Solubility of hydroxides in water
(d) Strength of elements as reducing agent
60. Alkaline earth metals are [MP PMT 1996]
(a) Li, Be, K, Mg, Ca (b) Be, Mg, Ca, Sr, Ba
(c) Be, K, Mg, Ca, Sr (d) Be, Mg, Ca, K, Rb
61. Which of the following substances is used in the
laboratory for fast drying of neutral gases [AIIMS 1998; AFMC 1999]
(a) Sodium phosphate
(b) Phosphorus pentoxide
(c) Sodium sulphate
(d) Anhydrous calcium chloride
62. Which of the following can be represented by the
configuration
2
[ Kr ] 5 s? [MP PMT 1997]
(a) Ca (b) Sr
(c) Ba
(d) Ra
63. Point out the incorrect statement regarding Be
(Group-IIA)
[MP PMT 1997]
(a) It forms an ionic carbide
(b) Its carbonate decomposes on heating
(c) Its halides are covalent
(d) It is easily attacked by water
64. Beryllium differs from rest of the members of its
family (Group-IIA) in many ways. The reason for
this is its
[MP PMT 1997]
(a) Small size and higher electronegativity
(b) Small size and lower electronegativity
(c) Large size and lower ionisation energy
(d) Large size and largest ionic radius
65. The oxide, which is best soluble in HO
2
is [BHU 2001]
(a)
2
Ba ( OH )
(b)
2
Mg ( OH )
(c)
2
Sr ( OH )
(d)
2
Ca ( OH )
66. The property of the alkaline earth metals that
increases with their atomic number is [BHU 2001]
(a) Ionisation energy
(b) Electronegativity
(c) Solubility of their sulphates
(d) Solubility of their hydroxides
67. In the Alkaline earth metals, the element forming
predominantly covalent compound is [BHU 2001]
(a) Be (b)
Mg
(c) Sr (d) Ca
68. A mixture of lime paste is sand, water and [RPMT 1997]
(a) Gypsum (b) Slacked lime
(c) Quick lime (d) Lime stone
69. The formula for calcium chlorite is [CBSE PMT 1994, 96]
(a)
2
4
CaClO (b)
2
3
CaClO
(c)
2
CaClO (d)
2 2
Ca ( ClO )
70. Which pair of substances gives same gaseous
product, when these react with water [CBSE PMT 1994]
(a) Ca and
2
CaH (b) Na and
2 2
NaO
(c) K and
2
KO (d) Ba and
2
BaO
(a) Actinides (b) Alkaline earth metals
(c) Transition series (d) Lanthanides
92. The thermal stability of alkaline earth metal
carbonates , ,
3 3
MgCO CaCO
3
BaCO and
3
SrCO
decreases as
[MP PMT 2002]
(a)
3 3 3 3
CaCO SrCO MgCO BaCO
(b)
3 3 3 3
BaCO SrCO MgCO CaCO
(c)
3 3 3 3
BaCO SrCO CaCO MgCO
(d)
3 3 3 3
MgCO CaCO SrCO BaCO
93. A certain metal M is used to prepare an antacid,
which is used as a medicine in acidity. This metal
accidently catches fire which can not be put out
by using
2
CO based extinguishers. The metal M is [BHU 2002]
(a) Ca (b) C
(c) Mg (d) All of these
2
Be ( OH ) is insoluble in water while
2
Ba ( OH ) is
highly soluble due to [AMU 2002]
(a) Bond order (b) Lattice energy
difference
(c) Common ion effect (d) Hard acid
95. Which of the following gives a green colour to
flame
[AFMC 2001]
(a) Barium (b) Calcium
(c) Strontium (d) None of these
96. Sparingly soluble salt is [RPMT 1999]
(a) KCl (b) NaCl
(c) NH Cl
4
(d)
4
BaSO
97. Among the alkaline earth metals the element
forming predominantly covalent compound is [MP PET 1999]
(a) Barium (b) Strontium
(c) Calcium (d) Berylium
98. Peroxide bond is present in [RPET 2003]
(a) MgO (b) CaO
(c) LiO
2
(d)
2
BaO
99. Least ionic character is found in [CPMT 1993]
(a) Mg (b) Sr
(c) Ca
(d) Ra
100. The number of water molecules in gypsum and
plaster of paris respectively are [Pb. PMT 1999]
(a) 1/2 and 2 (b) 2 and 1/
(c) 2 and 1 (d) 5 and 2
101. Which of the following is formed when calcium
combines with oxygen [MH CET 2000]
(a) Ca (b) CaO
(c)
2
CaO (d)
2 2
CaO
102. Slow acting nitrogenous fertilizer among the
following is
[DCE 2003]
(a)
2 2
NHCONH (b)
4 3
NHNO
(c) CaNCN (d)
3
KNO
103. Plaster of paris is used [Pb. CET 2000; CPMT 2000]
(a) In surgery and dentistry
(b) As a white wash
(c) As a constituent of tooth paste
(d) For the preparation of RCC
104. Iron pipes lying under acidic soil are often
attached to blocks of magnesium for protection
from rusting. Magnesium offers protection to iron
against corrosion because it
[DPMT 2004; BHU 2004]
(a) Prevents air from reaching the surface of iron
(b) is more readily converted into positive ions
(c) Is higher than iron
(d) Forms a corrosion-resistance alloy with iron
105. Among K , Ca , Fe ,and Zn , the element which can
form more than one binary compound with
chlorine is
[CBSE PMT 2004]
(a) K (b) Ca
(c) Fe (d) Zn
106. Li shows the diagonal relationship with [Pb.CET 2001]
(a) Mg (b) B
(c) Al (d) C
107. A sodium salt on treatment with
2
MgCl gives
white precipitate only on heating. The anion of
the sodium salt is
[IIT JEE Screening 2004]
(a)
3
HCO (b)
2
3
CO
(c)
3
NO (d)
2
4
SO
108. MgCl HO
2 2
. 6. When heated gives [MHCET 2003]
(a) Magnesium oxide
(b) Magnesium oxychloride
(c) Magnesium dichloride
(d) Magnesium chloride
109. Mg burns in CO to produce [Pb.PMT 2001]
(a)
2
MgO (b)
3
MgCO
(c) MgO CO (d) MgO C
110. Sorel's cement is [Pb.CET 2003]
(a) Portland cement MgO
(b) MgCl CaSiO HO
2 3 2
(c)
3 3
CaSiO. MgCO
(d) MgCl MgOxHO
2 2
111. Colemnite is [AFMC 2004]
(a) Ca BO OH HO
3 4 2 2
[ ( )]. 2
(b) Ca BO HO
2 6 11 2
(c)
2
Ca ( OH )
(d) Na BO HO
2 4 7 2
Boron family
1. Which of the following statements about
3 3
HBO
is not correct [CBSE PMT 1994]
(a) It is a strong tribasic acid
(b) It is prepared by acidifying an aqueous
solution of borax
(c) It has a layer structure in which planar
3
BO
units are joined by hydrogen bonds
(d) It does not act as proton donor but acts as a
Lewis acid by accepting hydroxyl ion
2. The type of hybridisation of boron in diborane is
[CPMT 1999]
(a) sp - hybridisation
(b) -
2
sp hybridisation
(c) -
3
sp hybridisation
(d) -
3 2
spd hybridisation
3. In the reaction. 2 3 2
B O C Cl A CO The A is
[Pb. PMT 2000]
(a)
3
BCl (b)
2
BCl
(c)
2 2
BCl (d)
2
CCl
4. The molecular formula of felspar is [MP PMT 2003]
(a)
2 2 3 2
KO. AlO. 6 SiO (b)
2 2 3 2
KO. 3 AlO. 6 SiO
(c)
3 6
NaAlF (d) CaSO HO
4 2
5. The most acidic of the following compounds is
[Bihar CEE 1995]
(a)
2 3
PO (b)
2 3
SbO
(c)
2 3
BO (d)
2 3
AsO
6. Identify the statement that is not correct as far as
structure of diborane is concerned [Pb. PMT 1998]
(a) There are two bridging hydrogen atoms in
diborane
(b) Each boron atom forms four bonds in diborane
(c) The hydrogen atoms are not in the same plane
in diborane
(d) All B - H bonds in diborane are similar
7. Soft heavy metal melts at
C
o
30 and is used in
making heat sensitive thermometers the metal is [RPET 2000]
(a) Galium (b) Sodium
(c) Potassium (d) Caesium
8. Which of the following is formed when aluminium
oxide and carbon is strongly heated in dry
chlorine gas
[AFMC 2000]
(a) Aluminium chloride
(b) Hydrate aluminium chloride
(c) Anhydrous aluminium chloride
(d) None of these
9. Which metal burn in air at high temperature with
the evolution of much heat [UPSEAT 199
(a) Cu (b) Hg
(c) Pb (d) Al
10. Aluminium hydroxide is soluble in excess of
sodium hydroxide forming the ion [AMU 2001]
(a)
3
2
AlO (b)
3
2
AlO
(c)
2
AlO (d)
3
AlO
11. Boron form covalent compound due to [Pb. PMT 2000]
(a) Higher ionization energy
(b) Lower ionization energy
(c) Small size
(d) Both (a) and (c)
12. In diborane, the two H B H angles are nearly
[AIIMS 2005]
(a) 60°, 120° (b) 95°, 120°
(c) 95°, 150° (d) 120°, 180°
13. Which of the following is a non-metal [MP PMT 1999]
(a) Gallium (b) Indium
(c) Boron (d) Aluminium
14. Which of the following is most acidic [BHU 1998]
(a) NaO
2
(b) MgO
(c)
2 3
AlO (d) CaO
15. When orthoboric acid ( )
3 3
HBO
is heated, the
residue left is
[Pb. PMT 2002]
(a) Metaboric acid (b) Boron
(c) Boric anhydride (d) Borax
16. Which of the following form dimeric halides
[Roorkee Qualifying 1998]
(a) Al (b) Mg
(c) In (d) Ga
17. The liquid field metal expanding on solidification
is
[AIIMS 2004]
(a) Ga (b) Al
(c) Zn (d) Cu
18. Aluminium chloride exists as dimer,
2 6
AlCl in
solid state as well as in solution of non-polar
solvents such as benzene. When dissolved in
water, it gives [AIEEE 2004]
(a)
[ Al ( OH )] 3 HCl
3
6
(b)
[ Al ( HO )] 3 Cl
3
2 6
(c)
Al 3 Cl
3
(d) Al O 6 HCl
2 3
19. The hardest substance amongst the following is
[Kerala PMT 2004]
(a) Be C
2
(b) Graphite
(c) Titanium (d) SiC
(e) BC
4
(b) Washing soda is easily decomposed
(c) Washing soda reacts with aluminium to form
soluble aluminate
(d) Washing soda reacts with aluminium to form
insoluble aluminium oxide
38. Which of the statements about anhydrous
aluminium chloride is correct [IIT 1981]
(a) It exists as
3
AlCl molecule
(b) It is not easily hydrolysed
(c) It sublimes at C
o
100 under vacuum
(d) It is a strong Lewis base
39. Common alum is
[DPMT 1982; CPMT 1978; AMU 1982, 83]
(a) K SO Al SO HO
2 4 2 43 2
(b) K SO Cr SO HO
2 4 2 43 2
(c) K SO Fe SO HO
2 4 2 43 2
(d) NH SO FeSO HO
4 2 4 4 2
40. Which of the following is not true about potash
alum
[MNR 1993; UPSEAT 2002]
(a) Its empirical formula is KAl SO HO
4 2 2
(b) Its aqueous solution is basic
(c) It is used in dyeing industries
(d) On heating it melts in its water of
crystallization
41. Which one of the following is correct statement
(a) The hydroxide of aluminium is more acidic
than that of boron
(b) The hydroxide of boron is basic, while that of
aluminium is amphoteric
(c) The hydroxide of boron is acidic, while that of
aluminium is amphoteric
(d) The hydroxide of boron and aluminium are
amphoteric
3
AlCl is [AFMC 1995]
(a) Anhydrous and covalent (b)Anhydrous and ionic
(c) Covalent and basic (d) Coordinate and
acidic
43. Aluminium (III) chloride forms a dimer because
[CBSE PMT 1995]
(a) Higher coordination number can be achieved
by aluminium
(b) Aluminium has high ionization energy
(c) Aluminium belongs to III group
(d) It cannot form a trimer
44. Aluminium has a great affinity for oxygen and its
oxidation is an exothermic process. This fact is
made use of in
[MP PMT 1997]
(a) Preparing thin foils of aluminium
(b) Making utensils
(c) Preparing duralumin alloy
(d) Thermite welding
45. Number of water molecules in Mohr's salt is
[CPMT 1997; AIIMS 2001; JIPMER 2001]
(a) 7 (b) 6
(c) 5 (d) 8
46. Which of the following is an amphoteric oxide
[BHU 2001]
(a) MgO (b)
2 3
AlO
(c)
2 7
ClO (d)
2 2
TiO
47. Aluminium oxide is not reduced by chemical
reactions since
[KCET 2002]
(a) Aluminium oxide is reactive
(b) Reducing agents contaminate
(c) Aluminium oxide is highly stable
(d) The process pollutes the environment
48. Aluminium is not used [DPMT 2002]
(a) In silvery paints
(b) For making utensils
(c) As a reducing agent
(d) As oxidizer in metallurgy
49. In the thermite process the reducing agent is
[Pb. PMT 2002]
(a) Al (b) C
(c) Mg (d) Na
50. In Goldschmidt aluminothermic process, thermite
contains
[KCET 2003]
(a) 3 parts of
2 3
AlO
and 4 parts of Al
(b) 3 parts of
2 3
FeO
and 2 parts of Al
(c) 3 parts of
2 3
FeO and 1 part of Al
(d) 1 part of
2 3
FeO and 1 part of Al
51. Bauxite containing impurities of iron oxide is
purified by
[CPMT 1987; AIIMS 1998]
(a) Hoop's process (b) Serpeck's process
(c) Baeyer's process (d) Electrolytic process
52. In the purification of bauxite by Hall's process
(a) Bauxite ore is heated with NaOH solution at
C
o
50
(b) Bauxite ore is fused with
2 3
NaCO
(c) Bauxite ore is fused with coke and heated at
C
o
1800 in a current of nitrogen
(d) Bauxite ore is heated with
3
NaHCO
53. Which one is used as a bye-product in Serpeck's
process
(a)
3
NH
(b)
2
CO
(c)
2
N (d)
3
PH
54. In the metallurgy of aluminium, cryolite is mixed
in the molten state because it [Roorkee 1995]
(a) Increases the melting point of alumina
(b) Oxidises alumina
(c) Reduces alumina
(d) Decreases the melting point of alumina
55. In the electrolytic extraction of aluminium,
cryolite is used
[NCERT 1981; CPMT 1989;
RPMT 2000; MP PMT 2000, 02]
(a) To obtain more aluminium
(b) To decrease temperature to dissolve bauxite
(c) To protect the anode
(d) As reducing agent
56. In the extraction of aluminium, bauxite is
dissolved in cryolite because
(a) It acts as a solvent
(b) It reduces melting point of aluminium oxide
(c) It increases the resistance of aluminium oxide
(d) Bauxite becomes active
57. In the extraction of aluminium the electrolyte is
[CBSE PMT 1989; AIEEE 2002]
(a) Fused cryolite with felspar
(b) Fused cryolite with fluorspar
(c) Pure alumina in molten cryolite
(d) Pure alumina with bauxite and molten cryolite
58. Aluminium is obtained by [KCET 1992; RPMT 2002]
(a) Reducing
2 3
AlO with coke
(b) Electrolysing
2 3
AlO dissolved in
3 6
NaAlF
(c) Reducing
2 3
AlO with chromium
(d) Heating alumina and cryolite
59. In the electrolysis of alumina, cryolite is added to
[IIT 1986; BHU 1987]
(a) Increase the melting point of alumina
(b) Increase the electrical conductivity
(c) Minimise the anodic effect
(d) Remove impurities from alumina
60. The function of fluorspar in the electrolytic
reduction of alumina dissolved in fused cryolite
3 6
NaAlF is
[KCET 1993; IIT 1993]
(a) As a catalyst
(b) To lower the temperature of the melt and to
make the fused mixture very conducting
(c) To decrease the rate of oxidation of carbon at
the anode
(d) None of the above
61. For purification of alumina, the modern processes
most useful when (i) the impurity present is a lot
of iron oxides and (ii) the impurity present is a
lot of silica, are
(a) For (i) Hall's process; for (ii) Baeyer's process
(b) For (i) Hall's process; for (ii) Serpeck's
process
(c) For (i) Serpeck's process; for (ii) Baeyer's
process
(d) For (i) Baeyer's process; for (ii) Serpeck's
process
62. For the electrolytic production of aluminium, (i)
the cathode and (ii) the anode are made of
(a) (i) Platinum and (ii) Iron
(b) (i) Copper and (ii) Iron
(c) (i) Copper and (ii) Carbon
(d) (i) Carbon and (ii) Carbon
63. In the commercial electrochemical process for
aluminium extraction, the electrolyte used is [IIT-JEE 1999]
(a)
3
Al ( OH ) in NaOH solution
(b) An aqueous solution of
2 43
Al ( SO )
(c) A molten mixture of
2 3
AlO
and
3 6
Na AlF
(d) A molten mixture of AlO ( OH )and
3
Al ( OH )
64. In electrolysis of aluminium oxide which of the
following is added to accelerate the process [AFMC 1999; CPMT 1999]
(a) Silica (b) Cryolite
(c) Nickel (d) Silicate
65. The purification of alumina is called
[CPMT 1997; AFMC 1998; AIIMS 1999]
(a) Bosch process (b) Caster process
(c) Baeyer's process (d) Hoop's process
66. Electrolytic reduction of alumina to aluminium by
Hall-Heroult process is carried out in the
presence of
[IIT-JEE (Screening) 2000]
(a) NaCl
(b) Fluorite
(c) Cryolite which forms a melt with lower melting
temperature
(d) Cryolite which forms a melt with higher
melting temperature
67. In the electrolytic method of obtaining aluminium
from purified bauxite, cryolite is added to the
charge in order to
[KCET 2004]
(a) Minimize the heat loss due to radiation
(b) Protect aluminium produced from oxygen
(c) Dissolve bauxite and render it conductor of
electricity
(d) Lower the melting point of bauxite
68. Hoop's process is used for the purification of the
metal
[MP PET 1995; MP PMT 2001]
(a) Al (b) Zn
(c) Ag (d) Cu
69. Purification of aluminium done by electrolytic
refining is known as
[CPMT 1989; CBSE PMT 1999; RPET 2003; BCECE 2005]
(a) Serpeck's process (b) Hall's process
(c) Baeyer's process (d) Hoop's process
70. In the Hoope's process for refining of aluminium,
the fused materials form three different layers
and they remain separated during electrolysis
also. This is because
[MP PET 1996]
Carbon family
1. Carbon and silicon belong to (IV) group. The
maximum coordination number of carbon in
commonly occurring compounds is 4, whereas
that of silicon is 6. This is due to
[CBSE PMT 1994]
(a) Large size of silicon
(b) More electropositive nature of silicon
(c) Availability of low lying d - orbitals in silicon
(d) Both (a) and (b)
2. The ionic carbide is [JIPMER 2000]
(a) ZnC (b) TiC
(c) SiC (d)
2
CaC
2
PbO is [JIPMER 2000]
(a) Basic (b) Acidic
(c) Neutral (d) Amphoteric
4. Lead pipes are not suitable for drinking water
because
[JIPMER 2000]
(a) A layer of lead dioxide is deposited over pipes
(b) Lead reacts with air to form litharge
(c) Lead reacts with water containing air to form
2
Pb ( OH )
(d) Lead forms basic lead carbonate
5. Silicon dioxide is formed by the reaction of
[KCET (Med.) 2001]
(a) SiCl HO
4 2
2 (b) SiO 4 HF
2
(c) SiO NaOH
2
(d) SiCl NaOH
4
6. Which alkali metal carbonate decomposes on
heating to liberate
2
CO gas [Pb. PMT 2000]
(a)
2 3
LiCO (b)
3
CaCO
(c)
2 3
NaCO (d)
2 3
AlCO
7. Which of the following gives propyne on
hydrolysis
[AIIMS 2005]
(a)
4 3
AlC (b)
2 3
MgC
(c) BC
4
(d)
4 3
LaC
8. Which one of the following statements is not
correct
[CBSE PMT 1994]
(a) Zinc dissolves in sodium hydroxide solution
(b) Carbon monoxide reduces iron (III) oxide to
iron
(c) Mercury (II) iodide dissolves in excess of
potassium iodide solution
(d) Tin (IV) chloride is made by dissolving tin
solution in concentrated hydrochloric acid
9. In laboratory silicon can be prepared by the
reaction
[Pb. PMT 1999]
(a) By heating carbon in electric furnace
(b) By heating potassium with potassium
dichromate
(c) Silica with magnesium
(d) None of these
10. Which of the following is the correct statement
for red lead
[AIIMS 2000]
(a) It is an active form of lead
(b) Its molecular formula is
2 3
PbO
(c) It decomposes into Pb and
2
CO
(d) It decomposes into PbO and
2
O
11. Suppose you have to determine the percentage of
carbon dioxide in a sample of a gas available in a
container. Which is the best absorbing material
for the carbon dioxide
[Pb. PMT 2001]
(a) Heated copper oxide
(b) Cold, solid calcium chloride
(c) Cold, solid calcium hydroxide
(d) Heated charcoal
12. The number and type of bonds between 2 carbon
atoms in
2
CaC
[UPSEAT 2001]
(a) One sigma ( )and one pi ( )bond
(b) One sigma ( )and two pi ( )bond
(c) One sigma ( )and half pi ( )bond
(d) One sigma ( )bond
13. Metalloid among the following is [DPMT 2001]
(a) Si (b) C
(c) Pb (d) Ge
14. ‘ Lead pencil ’ contains [DPMT 2001; IIT 1990]
(a) PbS (b) Graphite
(c) FeS (d) Pb
15. Nitrogen gas is absorbed by [DPMT 2001]
(a) Calcium hydroxide (b) Ferrous sulphate
(c) Calcium carbide (d) Aluminium carbide
16. In laboratory silicon can be prepared by the
reaction
[Pb. PMT 1999; AFMC 2002]
(a) Silica with magnesium
(b) By heating carbon in electric furnace
(c) By heating potassium fluosilicate with
potassium
(d) None of these
17. Formation of in-numberable compounds of carbon
is due to its [RPMT 1999]
(a) High reactivity
(b) Catenation tendency
(c) Covalent and ionic tendency
(d) Different valency
18. Colour is imported to glass by mixing [Pb. PMT 2002]
(a) Synthetic dyes (b) Metal oxide
(c) Oxides of non-metal (d) Coloured salt
19. Which of the following is insoluble in water [MP PET 2002]
(a)
2 3
NaCO (b)
3
CaCO
(c)
3
ZnCO (d)
2 33
Al ( CO )
20. In which of the following the inert pair effect is
most prominent [MP PMT 2000]
(a) C (b) Si
(c) Ge (d) Pb
21. Plumbosolvancy implies dissolution of lead in [DCE 1999]
(a) Bases (b) Acids
(c) Ordinary water (d)
4
CuSO sol
22. Which of the following glass is used in making
wind screen of automobiles [AIIMS 1999; Pb. CET 2000]
(a) Crook's (b) Jena
(c) Safety (d) Pyrex
23. Glass reacts with HF to produce
[KCET 2000; CBSE PMT PMT 2000]
(a)
4
SiF (b)
2 6
HSiF
(c)
2 3
HSiO (d)
3 6
NaAlF
24. The type of glass used in making lenses and
prisms is
[JIPMER 1999]
(a) A flint glass (b) Jena glass
(c) Pyrex glass (d) Quartz glass
25. When carbon monoxide is passed over solid
caustic soda heated to
o
200 C , it forms [KCET (Med.) 1999]
(a)
2 3
NaCO (b)
3
NaHCO
(c) H COONa (d) CHCOONa
3
26. Which is used to produce smoke screens [AFMC 2005]
(a) Calcium phosphide (b) Zinc sulphide
(c) Sodium carbonate (d) Zinc phosphide
27. Sodium oxalate on heating with conc. 2 4
HSO
gives
[Roorkee 2000]
(a) CO only (b)
2
CO only
(c) CO
and
2
CO
(d)
2
SO
and
3
SO
28. Extraction of lead by reduction methods is done
by
[AMU 2000]
(a) Adding more galena into reverberatory
furnace
(b) Adding more lead sulphate into reverberatory
furnace
(c) Adding more galena and coke into the
reverberatory furnace
(d) Self reduction of oxide from sulphide present
in the furnace
29. Which gas is used in excess water [BVP 2003]
(a)
2
CO (b)
2
SO
(c) CO (d) Water vapours
30. The compound which does not possess a peroxide
linkage is [JIPMER 1999
(a)
2 2
NaO (b)
5
CrO
(c)
2 5
HSO
(d)
2
PbO
31. Silicon is an important constituent of [MH CET 2001]
(a) Rocks (b) Amalgams
(c) Chlorophyll (d) Haemoglobin
32. Carborundum is
[AFMC 2002; MH CET 2003; BHU 2003, 05]
(a) SiC (b)
3
AlCl
(c)
2 43
Al ( SO ) (d) Al O HO
2 3 2
4
SiF gets hydrolysed giving ....... [Orissa JEE 2002]
(a)
2
SiO
(b)
2 2
Si ( OH ) F
(c)
2 6
HSiF (d)
4
Si ( OH )
34. Glass is a [AIEEE 2003; RPET 2003]
(a) Micro-crystaline solid
(b) Super cooled liquid
(c) Gel
(d) Polymeric mixture
2 2
HO on reaction with PbS gives [RPET 2003]
(a) PbO (b)
4
PbSO
(c)
2
PbO (d)
4
PbHSO
36. Soldiers of Napolean army while at Alps during
freezing winter suffered a serious problem as
regards to the tin buttons of their uniforms.
White metallic tin buttons got converted to grey
powder. This transformation is related to
[AIEEE 2004]
(a) A change in the partial pressure of oxygen in
the air
(b) A change in the crystalline structure of tin
(c) An interaction with nitrogen of the air at very
low to temperatures
(d) An interaction with water vapour contained in
the humid air
37. Solid
2
CO is known as dry ice, because [Pb. CET 2000]
(a) It melts at 0° C
(b) It evaporates at 40° C
(c) It evaporates at 78 C without melting
(d) Its boiling point is more than 199°C
38. Which one of the following statements about the
zeolites is false
[CBSE PMT 2004]
(a) Zeolites are aluminosilicates having three
dimensional network
(b) Some of the
4
4
SiO units are replaced by
5
4
AlO
and
9
6
AlO ions in zeolites
