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

The bleaching action of SO₂ is due to its

1. Acidic property

2. Basic property

3. Reducing property

4. Oxidising property

Compound among the following with an S-S bond is :

1. H₂S₂O₇

2. H₂SO₅

3. H₂S₂O₈

4. H₂S₂O₆

Which set of oxide of nitrogen is paramagnetic in nature?

(1) NO, N₂O

(2) NO₂, NO, N₂O

(3) NO,NO₂

(4) N₂O,NO₂

The product obtained as a result of a reaction of nitrogen with CaC₂ is:

1. CaCN         

2. CaCN₃

3. Ca₂CN       

4. CaCN₂

The variation of the boiling point of the hydrogen halides is in the order HF > HI > HBr >

HCl. What explains the higher boiling point of hydrogen fluoride?

1. The electronegativity of fluorine is much higher than for other elements in the group

2. There is strong hydrogen bonding between HF molecules

3. The bond energy ol HF molecules is greater than in other hydrogen halides

4. The effect of nuclear shielding is much reduced in fluorine which polarises the HF

molecule

Nitrogen gas is liberated by 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    

Consider the following sequence of reaction.

$\mathrm{Na}+{\mathrm{NH}}_3\left(\mathrm{g}\right)\underset{}{\to }\left[\mathrm{X}\right]\stackrel{{\mathrm{N}}_2\mathrm{O}}{\to }\left[\mathrm{Y}\right]\stackrel{\mathrm{Heat}}{\to }\underset{\mathrm{Gas} \mathrm{Pure}}{\left[\mathrm{Z}\right]}$

Identify [Z] gas :

$\left(\mathrm{a}\right) {\mathrm{N}}_2$

$\left(\mathrm{b}\right) {\mathrm{NH}}_3$

$\left(\mathrm{c}\right) {\mathrm{O}}_2$

$\left(\mathrm{d}\right) {\mathrm{H}}_2$

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

(1) ${\mathrm{BF}}_3$                           

(2) ${\mathrm{NCl}}_3$

(3) ${\mathrm{SF}}_4$                           

(4) ${\mathrm{PCl}}_5$