11
MCQ (Single Correct Answer)
On heating lead nitrate forms oxides of nitrogen and lead. The oxides formed are ............. .
A
$\mathrm{N}_2 \mathrm{O}, \mathrm{PbO}$
B
$\mathrm{NO}_2, \mathrm{PbO}$
C
$\mathrm{NO}, \mathrm{PbO}$
D
$\mathrm{NO}, \mathrm{PbO}_2$
12
MCQ (Single Correct Answer)
Which of the following elements does not show allotropy?
A
Nitrogen
B
Bismuth
C
Antimony
D
Arsenic
13
MCQ (Single Correct Answer)
Maximum covalency of nitrogen is ............ .
A
3
B
5
C
4
D
6
14
MCQ (Single Correct Answer)
Which of the following statements is wrong?
A
Single $\mathrm{N} — \mathrm{~N}$ bond is stronger than the single $\mathrm{P} — \mathrm{P}$ bond.
B
$\mathrm{PH}_3$ can act as a ligand in the formation of coordination compound with transition elements.
C
$\mathrm{NO}_2$ is paramagnetic in nature.
D
Covalency of nitrogen in $\mathrm{N}_2 \mathrm{O}_5$ is four.
15
MCQ (Single Correct Answer)
A brown ring is formed in the ring test for $\mathrm{NO}_3^{-}$ion. It is due to the formation of
A
$\left[\mathrm{Fe}\left(\mathrm{H}_2 \mathrm{O}\right)_5(\mathrm{NO})\right]^{2+}$
B
$\mathrm{FeSO}_4 \cdot \mathrm{NO}_2$
C
$\left[\mathrm{Fe}\left(\mathrm{H}_2 \mathrm{O}\right)_4(\mathrm{NO})_2\right]^{2+}$
D
$\mathrm{FeSO}_4 \cdot \mathrm{HNO}_3$