Q34 / 160 · AP EAMCET 2021 (24 Aug Shift 2) · Chemistry

Which reaction(s) among the following produce dinitrogen? Figure

  • Correct answer
    A
    1 and 3
  • B
    2 and 3
  • C
    3 and 4
  • D
    2 and 4

Solution

Barium azide $\left[\mathrm{Ba}\left(\mathrm{N}_3\right)_2\right]$ on heating gives $\mathrm{Ba}$ and $\mathrm{N}_2$. This reaction is a source of pure nitrogen. $\mathrm{Ba}\left(\mathrm{N}_3\right)_2 \stackrel{\Delta}{\longrightarrow} \mathrm{Ba}+3 \mathrm{~N}_2$ Ammonium chloride on reaction with calcium hydroxide gives nitrogen as follows $\mathrm{NH}_4 \mathrm{Cl}+\mathrm{NaNO}_2 \longrightarrow \mathrm{N}_2+2 \mathrm{H}_2 \mathrm{O}+\mathrm{NaCl}$ Both reactions are used for preparation of nitrogen.

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

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