Question

E. Write the balanced chemical equation for the following reactions :
(0) Reaction of zinc with H2SO4.
(ii) Reaction of Mg with hydrochloric acid.
(iii) Sodium reacts with water.
(iv) Photochemical decomposition of H2O2.
(v) Sodium hydroxide reacts with H2SO2,​

Answer 1

Explanation:

Zn+

dil

H

2

SO

4

→ZnSO

4

+H

2

In this reaction, H

+

is reduced by Zn.

Zn+2H

+

→H

2

+Zn

2+

(b) Zn+

conc.

2H

2

SO

4

→ZnSO

4

+SO

2

+2H

2

O

Zn reduces SO

4

2−

to SO

2

.

SO

4

2−

+4H

+

+Zn→Zn

2+

+SO

2

+2H

2

O

Hence, the given statement is true.

Answer 2

Answer:

1. Zn(S) + H2SO4(aq) ——> ZnSO4(aq) + H2(g)

already balanced....

2. Mg(s) + 2HCl(aq) ——> MgCl2 + H2(g)

3. 2Na(s) + 2H2O(l) ——> 2NaOH(aq) + H2(g)

4. H2O2——> H2O(l) + O2(g)

5. NaOH(aq) + H2SO2(aq) ——> Na2SO2(aq) + H2O(l)

hope it will help you....