1.

(a) What happens when1. mercuric oxide2. potassium nitrate are heated ?(b) Why is potassium chlorate not used for laboratory preparation of oxygen ?

Answer»

(a)

1. When mercuric oxide is heated, it decomposes to give mercury and oxygen.

2. Potassium nitrate on heating gets converted into molten potassium nitrite with the release of oxygen.

(b) Potassium chlorate needs heating for quite some time (to a high temperature) before it decomposes.



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