Q. Yellow mercury (II) oxide is obtained when
A) Hg is heated in excess of air at 623 K
B) $HgCl_{2}$ is treated with NaOH solution
C) $HgS\$is roasted in air
D) $Hg\left( NO_{3} \right)_{2}$ is heated in presence of Hg
Explanation
(b)
$HgCl_{2} + 2NaOH \rightarrow HgO + H_{2}O + 2NaCl$
yellow
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.