Question

The white solid compound A decomposes quite rapidly on heating in the presence of a black substance X to form a solid compound B and a gas C. When an aqueous solution of compound B is reacted with silver nitrate solution, then a white precipitate of silver chloride is obtained along with potassium nitrate solution. Gas C does not burn itself but helps burn other things.
(a) What is compound A ?
(b) What is compound B ?
(c) What is gas C ?
(d) What do you think is the black substance X ? What is its function ?
(e) What is the general name of substances like X ?

Lakhmir Singh Chemistry Class 10

Answer 1

Here is your answer :-

(a) Potassium chlorate

(b) Potassium chloride

(c) Oxygen

(d) Manganese dioxide . It acts as a catalyst in the decomposition .

(e) catalyst

Answer 2

Answer:

a) Potassium Chlorate: KClO3

b) Potassium Chloride: KCl

c) Oxygen: O2

d) Manganese Oxide: MnO2. It acts as catalyst in decomposition reaction.

e) Catalyst