Question

A metal nitrate a on heating gives a yellow residue along with the evolution of a brown gas b and a colourless gas



c. Aqueous solution of a on rain with potassium iodide form a yellow of compound



d. Identify a,b,c and d

Answer 1

Answer:

On heating (a)lead nitrate it undergoes thermal decomposition and gives Brown fumes of (b)nitrogen dioxide, oxygen gas and a yellow residue of lead oxide is left behind.

(c) Lead (II) Nitrate + Potassium Iodide → Lead (II) Iodide + Potassium Nitrate