Which of the following is a highly corrosive salt

Which of the following is a highly corrosive salt
  1. $\mathrm{FeCl}_{2}$
  2. $\mathrm{PbCl}_{2}$
  3. $\mathrm{Hg}_{2} \mathrm{Cl}_{2}$
  4. $\mathrm{HgCl}_{2}$

Solution

$\mathrm{HgCl}_{2}$ has corrosive action. It is highly poisonous. It sublimes on heating. It is, therefore, known as corrosive sublimate.

Asked in: JEE-TOPICTESTS-CHEMISTRY

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