Ammonium chloride and sodium nitrate are used for the laboratory preparation of which gas?

Nitrogen

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Oxygen

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Chlorine

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Hydrogen

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Solution

The correct option is A Nitrogen
In the laboratory, a mixture of ammonium chloride and sodium nitrate is heated to prepare nitrogen gas.

Double decomposition Reaction -
Upon heating a mixture of ammonium chloride and sodium nitrite, ammonium nitrate is formed. As it is highly unstable, it decomposes to give nitrogen.
${N H}_{4} C l + N a N O_{3} Δ - \to N H_{4} {N O}_{3} + N a C l$
$(a m m o n i u m c h l o r i d e) (s o d i u m n i t r a t e) (a m m o n i u m n i t r a t e) (s o d i u m c h l o r i d e)$
$N H_{4} {N O}_{3} ⟶ N_{2} O + 2 H_{2} O$
$(a m m o n i u m n i t r a t e) (l a u g h i n g g a s) (w a t e r)$

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