Q. In which of the following reactions, MgO is not formed?
A) $Mg + CO_{2}\ \rightarrow$
B) $Mg + dil.\ {HNO}_{3} \rightarrow$
C) $Mg + NO\overset{\ \ \ \ \ \mathrm{\Delta}\ \ \ \ \ }{\rightarrow}$
D) $Mg + B_{2}O_{3} \rightarrow$
Explanation
(b)
$Mg + 2HNO_{3} \longrightarrow Mg\left( NO_{3} \right)_{2} + H_{2} \uparrow$
dil.
Hence, MgO is not formed in this reaction.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.