A) \[{{N}_{2}}\]
B) \[{{N}_{2}}O\]
C) \[HN{{O}_{3}}\]
D) \[N{{O}_{2}}\]
Correct Answer: A
Solution :
\[3CaO+2N{{H}_{3}}\xrightarrow{{}}3Ca+{{N}_{2}}+3{{H}_{2}}O\] \[\therefore \] \[{{N}_{2}}\] gas is evolved when \[CaO\] reacts with\[N{{H}_{3}}\]
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