MCQ
$(NH_4)_2Cr_2O_7$ on heating gives :
- A$ N_2O$
- B$NH_3$
- C$NO_2$
- D$N_2$
✓
Answer
On heating, $\left(\mathrm{NH}_{4}\right)_{2} \mathrm{Cr}_{2} \mathrm{O}_{7}$ gives, nitrogen gas.$\left(\mathrm{NH}_{4}\right)_{2} \mathrm{Cr}_{2} \mathrm{O}_{7} \rightarrow \mathrm{N}_{2}+\mathrm{Cr}_{2} \mathrm{O}_{3}+4 \mathrm{H}_{2} \mathrm{O}$
$($Orange$) ($Green$)$
But whenever, $\mathrm{NH}_{4} \mathrm{NO}_{2}$ and $\mathrm{NH}_{4} \mathrm{NO}_{3}$ heated, then nitrogen and nitrogen dioxide gas liberated.
$\mathrm{NH}_{4} \mathrm{NO}_{2} \rightarrow \mathrm{N}_{2}+2 \mathrm{H}_{2} \mathrm{O}$
$\mathrm{NH}_{4} \mathrm{NO}_{3} \rightarrow \mathrm{N}_{2} \mathrm{O}+2 \mathrm{H}_{2} \mathrm{O}$
So, the correct option is $\mathrm{D}$
$($Orange$) ($Green$)$
But whenever, $\mathrm{NH}_{4} \mathrm{NO}_{2}$ and $\mathrm{NH}_{4} \mathrm{NO}_{3}$ heated, then nitrogen and nitrogen dioxide gas liberated.
$\mathrm{NH}_{4} \mathrm{NO}_{2} \rightarrow \mathrm{N}_{2}+2 \mathrm{H}_{2} \mathrm{O}$
$\mathrm{NH}_{4} \mathrm{NO}_{3} \rightarrow \mathrm{N}_{2} \mathrm{O}+2 \mathrm{H}_{2} \mathrm{O}$
So, the correct option is $\mathrm{D}$
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
Which of the following compound will show mutarotation
Identify $(Z)$ in the above sequence of reactions
→The reaction
→$A + B$ $\rightleftharpoons$ $C + D$ + heat
has reached equilibrium. The reaction may be made to proceed forward by
Which one of the following complexes will have four isomer
In a compound $C, H, N$ atoms are present in $9 : 1 : 3.5$ by weight. Molecular weight of compound is $108$ . Its molecular formula is
→The freezing point of equimolal aqueous solution will be highest for
In the following reactions products $(A)$ and $(B)$. respectively, are
→$\mathrm{NaOH}+\mathrm{Cl}_{2} \rightarrow(\mathrm{A})+$ side products
(hot and conc.)
$\mathrm{Ca}(\mathrm{OH})_{2}+\mathrm{Cl}_{2} \rightarrow(\mathrm{B})+$ side products
$(dry)$
Product $C$ is
→Which one of the following characteristics of the transition metals is associated with their catalytic activity
The most importasnt active step in the development of periodic table was taken by