Question

A compound ‘A’ is used in soda-lime fire-extinguisher and decomposes on heating to form compound ‘B’. Compound ‘B’ is used for removing permanent hardness of water. Identify ‘A' and ‘B’.

Answer 1

Compound ‘A' is sodium hydrogen carbonate (also known as sodium bicarbonate or baking soda). Compound ‘B' is sodium carbonate (also known as washing soda).