A $HgCl_{2}(s)+Hg(l)\rightarrow HgzCl_{2}(s)$
B $2Na+Cl_{2}\rightarrow 2NaCl(s)$
C $4HCl(aq)+MnO_{2}(s)\rightarrow MnCl_{2}(aq)+Cl_{2}(g)+2H_{2}O(l)$
D $Zn(s)+H_{2}SO_{4}(aq)\rightarrow ZnSO_{4}(aq)+H_{2}(g)$
Correct Answer: Option D
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