Q. Which one of the following reactions will occur on heating ${AgNO}_{3}$ above its melting point?
A) $2{AgNO}_{3} \longrightarrow 2Ag + 2{NO}_{2} + O_{2}$
B) $2{AgNO}_{3} \longrightarrow 2Ag + N_{2} + 3O_{2}$
C) $2{AgNO}_{3} \longrightarrow 2{AgNO}_{2} + O_{2}$
D) $2{AgNO}_{3} \longrightarrow 2Ag + 2NO + 2O_{2}\$
Explanation
(c)
Silver nitrate decomposes to silve nitrite on heating above its melting point $(212℃)$.
$2{AgNO}_{3}\ \ \overset{> 212℃}{\rightarrow}2{AgNO}_{2} + O_{2}$
On heating above $450℃$ (red hot), silver nitrate decomposes to metallic silver, oxide of nitrogen and oxygen.
$2{AgNO}_{3}\overset{> 450℃}{\rightarrow}\ 2Ag + 2{NO}_{2} + O_{2}$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.