Write your observation and a balanced equation for Zinc carbonate being heated.

Write your observation and a balanced equation for Ammonium chloride being heated.

Carbon dioxide and sulphur dioxide gas can be distinguished by using :

(a) moist blue litmus paper

(b) lime water

(c) acidified potassium dichromate paper

(d) none of the above

Assertion (A): Chlorine turns moist blue litmus red and finally decolourises it.

Reason (R): Chlorine is acidic in nature and an oxidising agent.

1. Both A and R are true and R is the correct explanation of A.
2. Both A and R are true but R is not the correct explanation of A.
3. A is true but R is false.
4. A is false but R is true.