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Class:xE CHEMTSTRY
EChaptes:1.
ChemicolKeaection Hndtquation
Chemical Reackion: n^ this^ PooceLs^
neu dubsiances 0e
Hooned with new Propextie
Reassangement of atoms
fosm
Buoning ot^ magnesium^
in ais^ to^ tov
magnesium oxide
ChoocHtrisics o chemical ReachoN
Evolution of^ a^ 2a
Foxmation (^) of a (^) Pöecipitate
Change in colour
Mg+O2 Heat MgD
change in tempeyatuxe Reactant9 LPsoductsS
Change in taBe
*Chemical Equation: The method of sepsesening a chemico)
Jeaction wHh he help of ynbol ond
tosmulae 0f the (^) ubstance involved in itis
Known a^ a^
chemical equation.
Word eauakion
Zinc +Sulphuzic acid Zinc
Sulphate +
Hydsogen
CHemi ca equation
Zn +HS0 (^) Zn SO, + H
CReactant) ooductes)
digechon of reactHon)
Balonced Equation
Equal no. of atoms of different elements Inin^ thethe
xeactants and ProductS
Zn +HaSO ZnSD^ + H
Unequal no. of atoms of different elements
in the eactants and P0duciS.
Mg+ O2 Mad
t, Hccording to the La Of ConSesvation 0f ma,
types
of (^) atomS in
the no.^ of^
Vasious
eactants
the
muSt be (^) equal to^
the no.^ of^ Wame
type
of atoms^
in Psoducts
aloncing of^ Chemical^ Equation
no Of different
on both dide
is (^) a (^) Psocess to (^) maxe (^) the
types Of atoms equal
Hit and_tria method
Fe +Hh0 eO
Fe 3
O 4
Maximum no of^ atom
2
fe 1
H 2
O 1
H
Fel+ho]PeaO+ +
3fe+ 4H,0^ fe^ D^
42 (Balanced equaton)
HMore Tnformove Egvotion
LOyiting
oymbols Of^ Physical Gtutes
gaseous liquid l, aquepus 09
dolid
3te (^) 19) + 4H09) Peg0u) + 4H,12)P
team form 0f Water )
Wxiing the^ condition^
under hirh
take Place
Colg)+2H,q)
QHo gtmn
0,laq 6CO oq++12H,o^ )^
unlight
chloso phy
L ucoBe
ypes of CHemica^ Reockion
Combination Reaciond: Too os more ubstance
Combine +o fosm ingle ubStanee, are
Caled Cornbination ReacHons
2Mgls)+^
0,q)
Combination 2M0^9
2H
%
Cormbina-Hon 2H0^ )
DecompoSi tion^ Rea
chon: Compound^ dplits^ up^
into
to0 Omore impler ubstan ces,
into
a0e Known^ as^
DeComposition Reaction. a0e
CaCOs s)
Heat Ca0^ t)^ +^ CO DecompOSition
2KCLO,Ls)
Heat
DecompoSitHon
2kCI )+ 30,9)
When (^) decomposition Reaction is (^) Casoied oU+ by heating,
its Called (^) theinal decomposition.
2feSOy Ls)^ Heat (^) fe,0 1+ (^) S0,g) +S g
2Agbr1s &onlight2Ag+Bra )
Used in Black and Onite Photograph
Displacement Keaction:^ One^
element taes^ e^ place^
of
anothe element^
in a compound,
0e TeactHong
Rnoon a
displacement Teactiong
Fe19)+Co60,^ Loo)^
PeSO laq)+Cots)
Tron dulpha te)
Ccoppes dulphate)
Zn 19)+^ CuSO^ laq)^
Zns0 laq)+^ Cu^ l)
LZino duphate) copPe dul phate)
Double Digplacement Keactionlo COmpounds Teacts
by an exchange Of ions
to fosm t0o new COmpounds ase Called double
dicplacement Teacions
Na SO,^ laq)^
- (^) Bacla Laq) BaGo^ l9)^ +^
Nact (^) laq)
Hg (^) NOg laq)^
LS)+NaNOglaq)
HS +
+2HCL
Oxidaion
Reduchion
ecds of Ovidotion Reachions in fveryday Dfe
ife
CoTrosion:
THe (^) adual detruction^
o Puse
metals by the^
action of^ air,^
moistuve
by 1S
Oa chemica liKe^ acid)^
on +heir^
usfate 1S
Caned covosion
O a
Rusting of
iyon Redox Reacion
4 Pe^
+2c H90 2feg^
xH,O
oxygen) wate)
4 Pe
CRust
Iyo
tdamage h^
iron and^ Dteel^ objects^
and
adtructUses g0uch^
a Oailings^ Cas^
bodie
money
byidge^
and hipS,^
eh A lot^
Of money
year to
of
bsidge
hus
to be^ dpent Covvosion-
evey
Psevent
Kancidity
1he condition^
Produced by aerial
food
Oxidation of^ fat^
and oilS^ in^
fbod
Unpleasant mell and test magked by
Cailed Dan^ Cidity KeepingHood in
Re fxigeTaBor
Poevenion
adding anti-oxidants-
TacKaqing fat and oil Con taining
food in nitto gen_a
food in^ oiy- tiqh
Conteii ners
food (^) away rOm light
