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H 2 -------Gain of Oxy------- H 2OCuO ----loss of Oxy.----- CuO.A- CuO
(supplier of Oxy) R.A- H 2 (Acceptor of Oxy)

b. ZnO + C Zn + CO

Oxidation Half- Reduction Half-
C -------Gain of Oxy------ CO ZnO ----loss of Oxy.--- Zn O.A- ZnO
(supplier of Oxy) R.A- C (Acceptor of Oxy)

c. MnO 2 + 4HCl  MnCl 2 + 2H 2O + Cl 2

Oxidation Half- Reduction Half-
HCl --gain of Oxygen -- H2O MnO 2 –loss of Oxygen.-->
MnCl 2 O.A- MnO2 (Supplier of Oxygen) R.A- HCl (Acceptor of
Oxygen)

B. Redox w.r.t GAIN/LOSS OF HYDROGEN-

d. HBr + Cl 2 HCl + Br 2

Oxidation Half- Reduction Half-
HBr -------Loss of Hydrogen--- Br 2Cl 2 --Gain of Hydrogen.HCl O.A- Cl 2
(Acceptor of Hydrogen)R.A- HBr(Supplier of Hydrogen)

C. Redox w.r.t GAIN/LOSS OF ELECTRONS-

e. Fe + Cu(SO 4) 2 Fe(SO 4) 2 + Cu(s) [Fe>Cu]
Blue sol. Pale green sol.

Oxidation Half- Reduction Half-
2+
2+
Fe ---loss of electronFe Cu2+ –Gain of electrons.CuO.A- Cu (Accepter of
electrons) R.A- Fe (Supplier of electrons)

f. Cu + 2AgNO 3 2Ag(s) + Cu(NO 3) 2 [Cu>Ag]
colourless sol blue sol.

Oxidation Half- Reduction Half-
+
2+
Cu ---loss of electroCu Ag –Gain of electrons.AgO.A- Ag+ (Accepter of
electrons) R.A- Cu (Supplier of electrons)

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