Question

When potassium chlorate (KClO3) is heated it forms potassium chloride and oxygen. Which of the foll. is/are true:
1. The molar ratio between the reactant and the gaseous product is 2:3
2. This is an eg. of thermal decomposition
3. 1 mole of this solid reactant on heating evolves 22.4 * 10^-3 Oxygen at stp
4. The loss in mass in the reaction is due to the escape of O2 when heated in an open test tube.
a) 1 &3 b)2 &3 c)1, 2 &4 d) all four

Answer 1

Answer:

When potassium chlorate (KClO3) is heated in the presence of manganese dioxide catalyst, it decomposes to form potassium chloride and oxygen gas.

The balanced chemical equation is

2KClO

3

→

Δ

2KCl+3O

2