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d-block and f-block elements, Exams of Chemistry

Chemistry

Various topics related to d-block and f-block elements, including their properties, oxidation states, reactions, and applications. It includes multiple-choice questions that test the reader's understanding of these concepts. A comprehensive overview of the key characteristics and behavior of these important groups of elements in the periodic table. By studying this document, students can gain a deeper understanding of the fundamental principles governing the chemistry of transition metals and inner transition metals, which are crucial for success in fields like inorganic chemistry, materials science, and environmental chemistry.

Typology: Exams

2023/2024

Available from 08/22/2024

kbzone1973
kbzone1973 🇮🇳

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BALAJI
d-block and f-block elements
1. Which of these cannot release iodine from KI solution
(1) CuSO4(2) PbO2
(3) MnSO4(4) H2O2
2. Colour of K2Cr2O7 is due to
(1) d-d transitions (2) charge transfer
(3) covalent character (4) it is not coloured
3. Which of these metal has fully filled ‘d’ orbital in all
its stable oxidation states
(1) Zn (2) Cd
(3) Hg (4) All of these
4. Which of these metals will dissolve in hot concentrated
NaOH?
(1) Zn (2) Ti
(3) Hg (4) All of these
5. Which of these will form ionic carbides?
(1) Fe (2) Li
(3) Si (4) none of these
6. The most dominant oxidation state of Ag is
(1) +1 (2) +2
(3) +3 (4) +4
7. A non-copper alloy is
(1) Solder (2) Brass
(3) Bronze (3) Bell metal
8. Which of these metal has one electron in the ‘s’ orbital
in ground state?
(1) Zn (2) Rh
(3) Pd (4) Sc
9. Which transition series area part of lanthenides
(1) first (2) second
(3) third (4) fourth
10. Which ion has the smallest size?
(1) Cu2+ (2) Ti2+
(3) Mn2+ (4) Ni2+
11. Transition element having density less than water
(1) Sc (2) Ti
(3) Zn (4) none of these
12. Which of these cannot show +1 oxidation state?
(1) Hg (2) Zn
(3) Cu (4) All of these
13. Wilkinson’s catalyst is
(1) Pd-BaSO4(2) (Ph3P)3 RhCl
(3) Al(Et)3 + TiCl4(4) [Co(CO)4]2
14. The diamagnetic species amongst these is
(1) 2+
2
Hg (2) Cu2+
(3) Cr3+ (4) Ti3+
15. Tetrahedral species amongst these is
(1) MnO4
–(2) 2–
4
CrO
(3) OsO4(4) all of these
16. Corrosive sublimate on complete reacti on with
stannous chloride forms
(1) Hg2Cl2(2) HgCl2
(3) Hg (4) HgCl
17. White compound amongst these is
(1) CdS (2) ZnS
(3) CuS (4) PbS
18. Highest oxi dation sta te shown by iron in any
compound is
(1) +2 (2) +3
(3) +5 (4) +6
19. Which of the following will have magnetic moment
35 BM ?
(1) Cu2+ (2) Fe2 +
(3) Zn2+ (4) Mn2+
20. Which of these element does not occur in nature?
(1) 92U2 35 (2) 43 Tc9 9
(3) 88R a226 (4) all of these
21. Which is the most abundant element of these by
weight in the earth crust?
(1) Mn (2) Fe
(3) Ti (4) Hg
22. Misch metal is used
(1) to improve strength of steel
(2) in magnesium alloys
(3) as lighter flints
(4) all of these
23. The number of orbitals pushed down energy in
octahedral field splitting is
(1) 3 (2) 2
(3) 4 (4) 5
24. The process employed for extraction of titanium is
(1) Van Arkel de Boer method
(2) Kroll process
(3) Hall’s process
(4) Down’s cell
25. The element having the highest melting point in the
first row of transition elements is
(1) Fe (2) Ti
(3) V (4) Mn
26. Adding a few drops of conc. HCl to small amount of
CuSO4 solution
(1) will make the solution colourless
(2) will ppt. Cu2Cl2
CLASSES BY ANKUR SIR 7983744732
pf3
pf4
pf5

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BALAJI

d-block and f-block elements

  1. Which of these cannot release iodine from KI solution (1) CuSO 4 (2) PbO 2 (3) MnSO 4 (4) H 2 O 2
  2. Colour of K 2 Cr 2 O 7 is due to (1) d-d transitions (2) charge transfer (3) covalent character (4) it is not coloured
  3. Which of these metal has fully filled ‘d’ orbital in all its stable oxidation states (1) Zn (2) Cd (3) Hg (4) All of these
  4. Which of these metals will dissolve in hot concentrated NaOH? (1) Zn (2) Ti (3) Hg (4) All of these
  5. Which of these will form ionic carbides? (1) Fe (2) Li (3) Si (4) none of these
  6. The most dominant oxidation state of Ag is (1) +1 (2) + (3) +3 (4) +
  7. A non-copper alloy is (1) Solder (2) Brass (3) Bronze (3) Bell metal
  8. Which of these metal has one electron in the ‘s’ orbital in ground state? (1) Zn (2) Rh (3) Pd (4) Sc
  9. Which transition series area part of lanthenides (1) first (2) second (3) third (4) fourth
  10. Which ion has the smallest size? (1) Cu2+^ (2) Ti2+ (3) Mn2+^ (4) Ni2+
  11. Transition element having density less than water (1) Sc (2) Ti (3) Zn (4) none of these
  12. Which of these cannot show +1 oxidation state? (1) Hg (2) Zn (3) Cu (4) All of these
  13. Wilkinson’s catalyst is (1) Pd-BaSO 4 (2) (Ph 3 P) 3 RhCl (3) Al(Et) 3 + TiCl 4 (4) [Co(CO) 4 ] 2
  14. The diamagnetic species amongst these is (1) Hg2+ 2 (2) Cu2+ (3) Cr3+^ (4) Ti3+
    1. Tetrahedral species amongst these is (1) MnO 4 –^ (2) (^) CrO2– 4 (3) OsO 4 (4) all of these
    2. Corrosive sublimate on complete reaction with stannous chloride forms (1) Hg 2 Cl 2 (2) HgCl 2 (3) Hg (4) HgCl
    3. White compound amongst these is (1) CdS (2) ZnS (3) CuS (4) PbS
    4. Highest oxidation state shown by iron in any compound is (1) +2 (2) + (3) +5 (4) +
    5. Which of the following will have magnetic moment 35 BM? (1) Cu2+^ (2) Fe2+ (3) Zn2+^ (4) Mn2+
    6. Which of these element does not occur in nature? (1) 92 U^235 (2) 43 Tc^99 (3) 88 Ra^226 (4) all of these
    7. Which is the most abundant element of these by weight in the earth crust? (1) Mn (2) Fe (3) Ti (4) Hg
    8. Misch metal is used (1) to improve strength of steel (2) in magnesium alloys (3) as lighter flints (4) all of these
    9. The number of orbitals pushed down energy in octahedral field splitting is (1) 3 (2) 2 (3) 4 (4) 5
    10. The process employed for extraction of titanium is (1) Van Arkel de Boer method (2) Kroll process (3) Hall’s process (4) Down’s cell
    11. The element having the highest melting point in the first row of transition elements is (1) Fe (2) Ti (3) V (4) Mn
    12. Adding a few drops of conc. HCl to small amount of CuSO 4 solution (1) will make the solution colourless (2) will ppt. Cu 2 Cl 2

BALAJI

(3) will make the solution green (4) no change will take place

  1. The colour of the transition element compounds is due to (1) high co-ordination number (2) high melting point (3) d-d transition (4) all of these
  2. Which property differentiates zinc from transition elements? (1) presence of only one oxidation state (2) exceptionally low melting point (3) completely filled ‘d’ orbital in all oxidation states (4) all of these
  3. Which of these elements does not dissolve in aqua- regia? (1) Au (2) Ag (3) Zn (4) Pt
  4. Which of these will form interstitial carbides (1) Fe (2) W (3) Co (4) All of these
  5. The most dominant oxidation state of Sc is (1) +1 (2) + (3) +3 (4) –
  6. Verdigris is (1) basic copper acetate (2) basic zinc acetate (3) Hg 2 Cl 2 (4) ZnS
  7. Which of these elements has 18 electrons in the outermost shell? (1) Ar (2) Zr (3) Pd` (4) Zn
  8. Which period has the largest number of elements? (1) 4 (2) 5 (3) 6 (4) 7
  9. The largest atomic radii is of (1) Sc (2) Zr (3) Ta (4) La
  10. The highest density amongst the given element is of (1) Sc (2) W (3) OS (4) Hg
  11. The maximum oxidation state is shown by (1) Sc (2) Os (3) Mn (4) Cr
  12. Highest paramagnetism will be (1) Fe2+^ (2) Cr3+ (3) Mn2+^ (4) Co2+
    1. The most acidic character will be shown by (1) Cr3+^ (2) Fe3+ (3) Mn7+^ (4) Zn2+
    2. Transition elements are capable of forming alloys due to (1) similar electronegativities (2) similar ionization energy (3) similar valencies (4) similar sizes
    3. On treatment with H 2 O 2 , Ti4+^ salts give a (1) deep blue colour (2) yellow-orange colour (3) white ppt. (4) no reaction
    4. Heaviest element in the lanthanide series is (1) Lanthanum (2) Erbium (3) Lutetium (4) Lawrencium
    5. Which of these is diamagnetic (1) Zn2+^ (2) MnO 4 – (3) CrO 4 2–^ (4) All of these
    6. FeSO 4. 7H 2 O is isomorphous with (1) white vitriol (2) blue vitriol (3) gypsom (4) potash alum
    7. The highest oxidation state amongst these are shown by (1) Ru (2) Mn (2) Fe (4) Ce
    8. Which acid can be used to acidify in KMnO 4 titration (1) HCl (2) H 2 SO 4 (3) HNO 3 (4) HBr
    9. The correct order of enthalpy of hydration is (1) V(II) > Cr(II) > Mn(II) > Cu (II) (2) Cu(II) > Mn(II) > Cr(II) > V(II) (3) Mn(II) > Cr(II) > V(II) > Cu(II) (4) Cr(II) > Mn(II) > Cu(II) > V(II)
    10. The magnetic moment (spin only value) is less than 4.0 BM for free ion (1) Cr2+^ (2) Fe3+ (3) Co3+^ (4) CO2+
    11. Cu2+^ reacts with reagent X to form a ppt which dissolves in its excess readily. X is (1) KCl (2) KCN (3) NH 4 SCN (4) NaN 3
    12. The chemical process in the production of steel from haematite ore involve (1) reduction (2) oxidation (3) reduction followed by oxidation (4) Oxidation followed by reduction

BALAJI

  1. CuSO 4 dissolves in ammonia due to the formation of (1) Cu(OH) 2 (2) CuO (3) [Cu(NH 3 ) 4 ]SO 4 (4) [Cu(NH 3 ) 4 (OH) 2 ]
  2. The rusting of iron is catalysed by (1) Fe (2) O 2 (3) Zn (4) Cu
  3. The colour of CuCr 2 O 7 solution in water is green because (1) Cr 2 O 7 2–^ ions are green (2) Cu2+^ ions are green (3) both of the ions are green (4) Cu2+^ ions are blue and Cr 2 O 7 2–^ ions are yellow orange
  4. On adding KI solution in excess to a solution of CuSO 4 , we get a ppt. ‘X’ and mother liquor ‘Y’ select the pair (1) ‘X’ is CuI 2 & ‘Y’ is I 2 solution (2) ‘X’ is Cu 2 I 2 & ‘Y’ is I 2 solution (3) ‘X’ is Cu 2 I 2 & ‘Y’ is KI 3 solution (4) ‘X’ is CuI 2 & ‘Y’ is KI 3 solution
  5. The element shows more than one oxidation state except (1) Sc (2) Cu (3) Zn (4) Co
  6. Lunar caustic is (1) AgNO 3 (2) AgCl (3) Ag 2 O (4) Ag 2 S
  7. A stable +4 oxidation state is shown by (1) La (2) Sm (2) Ym (4) Ce
  8. Colourless solution of the following four salts are placed separately in four different test tubes and a strip of copper is dipped in each one of these. Which solution will turn blue (1) KNO 3 (2) AgNO 3 (3) Zn(NO 3 ) 2 (4) ZnSO 4
  9. Cr3+^ dissolves in excess NaOH to give (1) CrO 3 (2) Cr(OH) 3 (3) Cr 2 O 7 2–^ (4) [Cr(OH) 4 ]–
  10. Process of heating the quenched steel to a temperature much below redness and then cooling it slowly is (1) Quenching (2) Case Hardening (3) Tempering (4) Annealing
  11. Which of the following statement is correct? (1) cast iron has highest % of carbon (2) wrought iron has lowest % of carbon (3) both (1) & (2) (4) none
  12. Which of the following is employed to give chromyl chloride test? (1) CrO 3 (2) K 2 CrO 4 (3) K 2 Cr 2 O 7 (4) Cr 2 O 3
  13. Zn with very dilute HNO 3 solution gives (1) Zn(NO 3 ) 2 + N 2 O (2) Zn(NO 3 ) 2 + NH 4 NO 3 (3) Zn(NO 3 ) 2 + NO 2 (4) only Zn (NO 3 ) 2
  14. The aqueous solution of the following salts will be coloured in case of (1) Zn(NO 3 ) 2 (2) LiNO 3 (3) Co(NO 3 ) 2 (4) Cu 2 Cl 2
  15. Which of the following suggested compounds of titanium is unlikely to exist (1) K 3 TiF 6 (2) K 2 TiF 6 (3) K 2 TiO 4 (4) Ti(H 2 O) 6 Cl 3
  16. Which one will have highest paramagnetism (1) Mn2+^ (2) Zn2+ (3) Fe2+^ (4) Ni2+
  17. Silver objects tarnish slowly in air due to the formation of (1) Ag 2 O (2) Ag 2 S (3) Ag 2 CO 3 (4) AgO 2
  18. Which of the following species has O-O bond? (1) Cr 2 O 3 (2) CrO 5 (3) Cr 2 O 7 2–^ (4) CrO 4 2–
  19. The chemical formula for most acidic oxide of Cr (1) CrO 3 (2) Cr 2 O 3 (3) CrO (4) CrO 2
  20. Philospher’s wool is (1) PbO (2) ZnO (3) CuO (3) FeO
  21. Calomal (Hg 2 Cl 2 ) is turned black by NH 3 due to the formation (1) HgCl 2 (2) Hg (3) Hg + Hg NH 2 Cl (4) Hg NH 2 Cl
  22. Transition metal used for making joints in jwellary is (1) Zn (2) Cu (3) Fe (4) Pt
  23. The basic anhydride is (1) Mn 2 O 7 (2) MnO 3 (3) MnO 2 (4) MnO
  24. The ore used for extraction of manganese is (1) Pyrolusite (2) Hausmannite (3) Braunit (4) none of these
  25. Which of these can be used to convert K 2 MnO 4 in KMnO 4? (1) Cl 2 (2) CO 2 (3) O 3 (4) all of these

BALAJI

  1. Which of these gives a colourless solution in water? (1) FeCl 3 (2) KMnO 4 (3) ZnSO 4 (4) CuSO 4
  2. ZnO on reaction with NaOH gives (1) Zn (2) NaZnO 4 (3) ZnOH (4) Na 2 ZnO 2
  3. Which metal can adsorb hydrogen most effectively? (1) Ti (2) Au (3) Pd (4) Cu
  4. A metallic oxide which imparts purple colour to pottery is (1) MnO 2 (2) Na 2 O (3) Cu 2 O (4) PbO
  5. Which of these does not have an exceptional configuration? (1) Nb (2) Ni (3) Cu (4) Pd
  6. Actinides are (1) members of third transition series (2) inner transition elements (3) non radio active (4) all of these
  7. The lightest among these is (1) Zr (2) Ti (3) Zn (4) Ni
  8. Which of these will show +8 oxidation state? (1) Ti (2) CO (3) Os (4) Cu
  9. Spongy platinum is used as catalyst in (1) Ostwald’s process (2) Haber’s process (3) Fischer Tropsch process (4) Lead chamber process
  10. The element which will become lighter in magnetic field is (1) Zn (2) Ni (3) Ni (4) Co
  11. The most covalent amongst these is (1) MnO (2) MnO 2 (3) Mn 2 O 3 (4) Mn 2 O 7
  12. The colour of transition metal compound could be due to (1) d-d transition (2) charge transfer spectra (3) polarisation (4) all of these
  13. K 2 MnO 4 can be converted to KMnO 4 by passing CO 2 through its solution. The oxidising agent is (1) CO 2 (2) MnO 4 2– (3) MnO 2 (4) (^) OH
  1. In conversion of FeCrO 4 to Fe 2 O 3 and CrO 4 2–, the equivalent weight of FeCrO 4 will be (M is molecular mass of FeCrO 4 ) (1) 3

M

M

M

M

  1. Which of these is non-magnetic? (1) alnico (2) wrought iron (3) pig iron (4) stainless steel
  2. Copper or brass utensiles are coated with tin from inside to (1) to make then beautiful (2) to prevent organic acid attack (3) make it heat resistant (4) increase its durability
  3. Which of these is not a lanthanide element? (1) La (2) Ce (3) Pm (4) Lu

BALAJI

ANSWERS