Nitrogen gas is obtained by thermal decomposition of
$B a (N_{3})_{2}$
$N a N O_{2}$
$N a N O_{3}$
$B a (N O_{3})_{2}$

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Solution

The correct option is A $B a (N_{3})_{2}$
Very pure dinitrogen can be obtained by the thermal decomposition of barium azide and sodium azide.
$B a (N_{3})_{2} (s) Δ - \to B a (s) + 3 N_{2} (g) ↑$
$2 N a N_{3} (s) Δ - \to 2 N a (s) + 3 N_{2} (g) ↑$
$B a (N_{3})_{2} Δ ⟶ B a + 3 N_{2}$

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