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

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

State the original colour of the following substances and colour of residue obtained after heating.

(a) ammonium dichromate

(b) copper carbonate

(c) lead nitrate

(d) zinc carbonate

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