Which is not a polymeric/dimeric hydride?

1. ${\mathrm{BeH}}_2$

2. ${\mathrm{MgH}}_2$

3. ${\mathrm{BH}}_3$

4. $\mathrm{NaH}$

What volume of 15 $\mathrm{V} {\mathrm{H}}_2 {\mathrm{O}}_2$ required to react completely with 10 ml of 1 M ${\mathrm{KMnO}}_4$ in acidic medium?

1. 18.72 ml

2. 25.51 ml

3. 14.20 ml

4. 10.65 ml

${\mathrm{H}}_2{\mathrm{O}}_2$ functions as a 

1. Bleaching agent

2. Oxidising agent

3. Oxidant for a rocket fuel

4. All of the above

A substance on heating gives oxygen and it turns acidified KI solution violet and reduces acidified ${\mathrm{KMnO}}_4$ solution. Hence, the substance is 

1. ${\mathrm{SO}}_2$

2. ${\mathrm{K}}_2{\mathrm{CrO}}_4$

3. ${\mathrm{H}}_2{\mathrm{O}}_2$

4. All of the above

Molarity of a solution of 1 liter $H_2{O}_2$ marked as 20 volume is-

1. 1.78

2. 3.57

3. 20

4. 0.20

Incorrect statement is

1. Hybridisation of oxygen for water in solid, liquid and gas phase is $s{p}^3$

2. Density of water is more than the density of ice

3. Boiling point of HF> Boiling point of $H_{2}O,$ as electronegativity of F>O

4. All of thhe above

Which of the following reaction involve in Bosch's process used for the manufacturing of $H_2$?

1. $C{H}_{3}OH\underset{catalyst}{\overset{400°C}{\to }} CO+2H_2$

2. $H_2+CO+H_{2}O\to C{O}_2+2H_2$

3. $3Fe+4H_{2}O\stackrel{}{\to F{e}_3 O_4 + }4H_2$

4. $C_2{H}_6\stackrel{Cracking}{\to }2C+3H_2$

Which of the following hydride does not give $H_2$ at anode on electrolysis in molten state?

1. $Sr{H}_2$

2. $Ba{H}_2$

3. $Mg{H}_2$

4. $Ca{H}_2$

$H_2{O}_2$ restores the colour of old lead paintings, blackend by the action of$H_{2}S$ gas, by

1. Oxidising $PbS{O}_3 to PbS{O}_4$

2. Converting $PbC{O}_3 to Pb$

3. By oxidising $PbS to PbS{O}_4$

4. Converting $Pb{O}_2 to Pb$

$C_{\left(s\right)}+H_2{O}_{\left(g\right)}\stackrel{1270K}{\to }\underbrace{C{O}_{\left(g\right)}+H_{2\left(g\right)}}$
$coal Syn gas$

The above process is known as

1. Coal gasification

2. Coal digestion

3. Syngas gasification

4. Water gasification