Q15 / 160 · TS EAMCET 2018 (04 May Shift 2) · Chemistry

Calcium on heating in $\mathrm{N}_2$ yields an ionic compound $A$, which reacts with water to give $\mathrm{Ca}(\mathrm{OH})_2$ and a gas $B$. Identify $A$ and $B$

  • A
    $\mathrm{CaN}_2, \mathrm{NO}$
  • Correct answer
    B
    $\mathrm{Ca}_3 \mathrm{~N}_2, \mathrm{NH}_3$
  • C
    $\mathrm{CaN}_2, \mathrm{NH}_3$
  • D
    $\mathrm{Ca}_3 \mathrm{~N}_2, \mathrm{NO}$

Solution

$3 \mathrm{Ca}+\mathrm{N}_2 \stackrel{\Delta}{\longrightarrow} \mathrm{Ca}_3 \mathrm{~N}_2$ $$ \begin{aligned} & \mathrm{Ca}_3 \mathrm{~N}_2+6 \mathrm{H}_2 \mathrm{O} \longrightarrow 3 \mathrm{Ca}(\mathrm{OH})_2+2 \mathrm{NH}_3 \\ & \text { So, the product } A \text { is }=\mathrm{Ca}_3 \mathrm{~N}_2 \\ & \text { and the product } B \text { is }=\mathrm{NH}_3 \text { gas. } \end{aligned} $$

Hence, the correct answer is option: 'B'.

Relevant Questions