Question

The statements given below represent the characteristics of nitrates of different metals

(a) Nitrate of sodium liberates brown coloured gas on strong heating.

(b) Nitrate of calcium liberates a pair of colourless gases on strong heating.

(c) Metallic silver can be obtained from its nitrate on strong heating.

(d) Nitrate of potassium gives a solid product and a colourless gas on strong heating.

Which of the following options is correct?

• A. a and b
• B. c and d
• C. only d
• D. only b

Answer 1

The correct option is B c and d

(a) Nitrate of sodium liberates colourless neutral gas $O_2$ on strong heating.

$2NaN{O}_3\to 2NaN{O}_2+O_2$

(b )Nitrate of calcium liberates a colourless gas $O_2$ and a reddish-brown gas $N{O}_2$ on strong heating.

$2Ca(N{O}_3{)}_2\to 2CaO+4N{O}_2+O_2$

(c) Metallic silver can be obtained from its nitrate on strong heating

$2Ag(N{O}_3{)}_2\to 2A{g}_{\left(s\right)}+4N{O}_2(g)+O_2$

(d) Nitrate of potassium gives a solid product $KN{O}_2$ and a colourless gas $O_2$ on strong heating.

$KN{O}_3\to KN{O}_2+O_2$

Hence, the correct option is $\text{B}$