Question

The white solid compound A decomposes quite rapidly on heating in the presence of a ** 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 itself but helps *** other things.

(a) What is compound A ?

(b) What is compound B ?

(c) What is gas C ?

(d) What do you think is the ***** substance X ? What is its function ?

(e) What is the general name of substances like X ?

Answer 1

(a) Potassium chlorate, KClO3

(b) Potassium chloride, KCl

(c) Oxygen, O2

(d) Manganese dioxide, MnO2 ; It acts as a catalyst in the decomposition of potassium chlorate to form oxygen gas

(e) Catalysts