A) \[F{{e}_{2}}O3\]
B) Al powder
C) \[CaC{{N}_{2}}+C\] (graphite)
D) \[NaOH+CaO\]
Correct Answer: B
Solution :
Ammonal is a mixture of aluminium and ammonium nitrate. So, aluminium powder is used in the preparation of ammonal.
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