A) Fe
B) Zn
C) Cu
D) Ag
Correct Answer: B
Solution :
Zinc is quite reactive metal. It dissolves in excess of hot \[NaOH\] to give sodium zincate. \[Zn+2NaOH\xrightarrow{{}}\underset{\text{sodium}\,\text{zincate}}{\mathop{N{{a}_{2}}Zn{{O}_{2}}+{{H}_{2}}\uparrow }}\,\]
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