Q. Which of the following is used as purgative?
A) $HgS$
B) ${Hg}_{2}{Cl}_{2}$
C) ${HgCl}_{2}$
D) ${ZnSO}_{4}$
Explanation
(b)
HgS is used in ayurvedic medicine as makardhwaja.
${HgCl}_{2}$ is poisonous and its antidote is egg white.
${ZnSO}_{4}$ is used in eye lotion.
${Hg}_{2}{Cl}_{2}$ is used as purgative in medicine and in making standard calomel electrode.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.