Question

11. Match the following:
(a) Zn(s)+H_SO (aq) (i) Photochemical
→ ZnSO (aq) +H_() decomposition
(b) 2AgCl(s)
(ii) Thermal
Sunlight, 2Ag(s)+CL (2) decomposition
(c) 2KCI
(iii) Displacement reaction
Electricity, 2K+C12
(d) 2HgO(s)
(iv) Electrolytic
A, 2Hg(s) +0,() decomposition
12. Multiple choise :
(a) Which of the following is not a characteristic of a
chemical change?​

Answer 1

Answer:

it's b because as you can see thermal expansion can break down the molecule and u know that the old photos were also created by this

Answer 2

Explanation:

a --- (iii)

b --- (i)

c --- (ii)

d --- (iv)