Q. $\left( {NH}_{4} \right)_{2}{Cr}_{2}O_{7}$ on heating gives a gas which is also given by
A) Heating ${NH}_{4}{NO}_{2}$
B) Heating ${NH}_{4}{NO}_{3}$
C) ${Mg}_{3}N_{2} + H_{2}O$
D) Na(Comp.)+ $H_{2}O_{2}$
Explanation
(a)
Ammounium dichromate on heating gives $N_{2}$ gas which is also given by heating of ${NH}_{4}{NO}_{2}$.
$\left( {NH}_{4} \right)_{2}{Cr}_{2}O_{7}\overset{\mathrm{\Delta}}{\rightarrow}{Cr}_{2}O_{3} + 4H_{2}O + N_{2} \uparrow$
${NH}_{4}{NO}_{2}\overset{\mathrm{\Delta}}{\rightarrow}2H_{2}O + N_{2} \uparrow$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.