Question

The diagram shows an experimental set up for the laboratory preparation of a pungent smelling gas. The gas is alkaline in nature.

(i) Name the gas collected in the jar. 

(ii) Write the balanced equation for the above preparation. 

(iii) How is the gas being collected ? 

(iv) Name the drying agent used. 

(v) How will you find that the jar is full of gas ?

Answer 1

(i) Ammonia.

(iii) By downward displacement of air. 

(iv) Quick lime (CaO). 

(v) By bringing a wet red litmus paper near the brim (mouth) of the gas jar. When jar is full of gas, litmus will turn blue.