Question

Identify the substance oxidised, substance reduced, oxidising agent and reducing agent.
a) Zn + 2NaOH---------> Na2 Zn O2 + H2
b) Zn + H2SO4---------> Zn SO4 +H2
c) Na2 SO3 + BaCl2------->BaSO3 + 2NaCl
d) 4NH3 + 5O2--------->4NO + 6H2O
e) Fe2O3 + 3O2----------> 3Fe + 3CO2

Answer 1

Substance oxidised is a substance in which oxygen is added, hydrogen is removed or electrons are lost. Oxidising agent is a substance which oxidises a substance.

Substance reduced is a substance in which hydrogen is added, oxygen is removed or electrons are gained. Reducing agent is a substance which reduces a substance.

The answers for the given questions are as follows:-

a) Substance reduced :- NaOH

   Substance oxidised :- Zn

   Oxidising agent:- NaOH

   Reducing agent:- Zn

b) Substance reduced :- H2SO4

   Substance oxidised :- Zn

   Oxidising agent:- H2SO4

   Reducing agent:- Zn

c) Substance reduced :- Na2SO3

   Substance oxidised :- BaCl2

   Oxidising agent:- Na2SO3

   Reducing agent:- BaCl2

d) Substance reduced :- O2

   Substance oxidised :- NH3

   Oxidising agent:- O2

   Reducing agent:- NH3

e) Substance reduced :-  (Reaction is incorrect)

   Substance oxidised :- (Reaction is incorrect)

   Oxidising agent:- (Reaction is incorrect)

   Reducing agent:- (Reaction is incorrect)