In which process does the nitrogen undergo oxidation?

(1) N_{2 ^$\to$}2NH₃

(2) N₂O_{4  ^$\to$}2NO₂

(3) NO3^- _$\to$ N₂O₅

(4) NO₂^{-  _$\to$}NO₃^-

Which of the following has been arranged in order of decreasing bond dissociation energy:

(1) P-O>Cl-O>S-O

(2) P-O>S-O>Cl-O

(3) S-O>Cl-O>P-O

(4) Cl-O>S-O>P-O

Which set of oxide of nitrogen is paramagnetic in nature?

(1) NO, N₂O

(2) NO₂, NO, N₂O

(3) NO,NO₂

(4) N₂O,NO₂

S-S bond is present in

(1) H₂S₂O₇

(2) H₂SO₅

(3) H₂S₂O₈

(4) H₂S₂O₆

Bleaching action of SO₂ is due to its

(1) acidic property

(2) basic property

(3) reducing property

(4) oxidising property

Which is not hydrolysed with water?

(1) PCl₃

(2) NF₃

(3) NCl₃

(4) BCl₃

Ammonia on reaction with excess of chlorine gives

(1) NCl₃ and HCl

(2) N₂ and NH₄Cl

(3) NCl₃ and NH₄Cl

(4) N₂ and HCl

Nitrogen gas is liberated by the thermal decomposition of:

1. ${\mathrm{NH}}_4{\mathrm{NO}}_2$                                 

2. ${\mathrm{NaN}}_3$

3. ${\left({\mathrm{NH}}_4\right)}_2{\mathrm{Cr}}_2{\mathrm{O}}_7$                           

4. All of the above. 

Consider the following sequence of reaction.

$\mathrm{Na}+{\mathrm{NH}}_3\left(\mathrm{g}\right)\underset{}{\to }\left[\mathrm{X}\right]\stackrel{{\mathrm{N}}_2\mathrm{O}}{\to }\left[\mathrm{Y}\right]\stackrel{\mathrm{Heat}}{\to }\underset{\mathrm{Gas}<mspace\; width="1em"></mspace>\mathrm{Pure}}{\left[\mathrm{Z}\right]}$

Identify [Z] gas :

$\left(\mathrm{a}\right)<mspace\; width="1em"></mspace>{\mathrm{N}}_2$

$\left(\mathrm{b}\right)<mspace\; width="1em"></mspace>{\mathrm{NH}}_3$

$\left(\mathrm{c}\right)<mspace\; width="1em"></mspace>{\mathrm{O}}_2$

$\left(\mathrm{d}\right)<mspace\; width="1em"></mspace>{\mathrm{H}}_2$

Which of the following compound does not produce oxyacid of central atom on hydrolysis?

(a) ${\mathrm{BF}}_3$                            (b) ${\mathrm{NCl}}_3$

(c) ${\mathrm{SF}}_4$                            (d) ${\mathrm{PCl}}_5$