A) \[HgS\]
B) \[H{{g}_{2}}C{{l}_{2}}\]
C) \[HgC{{l}_{2}}\]
D) \[ZnS{{O}_{4}}\]
Correct Answer: B
Solution :
\[HgS\] is used in ayurvedic medicine as makardhwaja. \[HgC{{l}_{2}}\] is poisonous and its antidote is egg white. \[ZnS{{O}_{4}}\] is used in eye Iotion. \[H{{g}_{2}}C{{l}_{2}}\] is used as purgative in medicine and in making standard calomel electrode.
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