It constitutes around 65% of the human body and 95% of plants

It acts as a carrier of various nutrients required by plants and animals for various metabolic reactions.

 The high heat of vaporization and heat of capacity of water helps in moderating the climate and body temperature of all living beings

All of the above.

A high value of dielectric constant  

A high value of dipole moment

A high value of lattice energy

Both '1' and '2'

 it increases the rate of catabolic reactions 

it slows the rate of anabolic and catabolic reactions

it slows the rate of anabolic reactions.

it increases the rate of a reaction.

They react with water to form a metal hydroxide along with the liberation of oxygen gas.

They react with water to form a metal hydroxide along with the liberation of hydrogen gas.

They react with water to form a metal carbonate along with the liberation of oxygen gas.

They react with water to form a metal carbonate along with the liberation of hydrogen gas.

It acts as a strong oxidizing agent both in acidic and basic media.

It acts as a strong reducing agent both in acidic and basic media.

It acts as a strong oxidizing agent only in neutral media.

It acts as a strong reducing agent only in neutral media.

 ${\mathrm{H}}_2{\mathrm{O}}_2\underset{\mathrm{sunlight}}{\overset{\mathrm{hv}}{\to }}{\mathrm{H}}_2\mathrm{O}+{\mathrm{O}}_3$

$2{\mathrm{H}}_2{\mathrm{O}}_2\underset{\mathrm{sunlight}}{\overset{\mathrm{hv}}{\to }}2{\mathrm{H}}_2\mathrm{O}+{\mathrm{O}}_2$

$2{\mathrm{H}}_2{\mathrm{O}}_2\underset{\mathrm{sunlight}}{\overset{\mathrm{hv}}{\to }}2{\mathrm{H}}_2\mathrm{O}+{\mathrm{H}}_2$

 $2{\mathrm{H}}_2{\mathrm{O}}_2\underset{\mathrm{sunlight}}{\overset{\mathrm{hv}}{\to }}\mathrm{NO} \mathrm{Rxn}$

Copper 

 FeCr₂O₄ (iron chromate) 

 Pd/C 

None of the above.

Hydrolysis reaction

Redox reaction

Disproportionation reaction

None of the above

 ${\mathrm{Mn}}^{+2} \hspace{0.17em}+{\mathrm{H}}_2{\mathrm{O}}_2 \to {\mathrm{Mn}}^{+4} +\hspace{0.17em}2{\mathrm{OH}}^{-}$

 $\mathrm{PbS} +4{\mathrm{H}}_2{\mathrm{O}}_2 \to {\mathrm{PbSO}}_4 +\hspace{0.17em}4{\mathrm{H}}_2\mathrm{O}$

 ${\mathrm{I}}_2 + {\mathrm{H}}_2{\mathrm{O}}_2 + 2{\mathrm{OH}}^{-} \to 2{\mathrm{I}}^{-} +\hspace{0.17em}2{\mathrm{H}}_2\mathrm{O}\hspace{0.17em}+ {\mathrm{O}}_2$

All of the above

Different chemical process

Same chemical process

Can be used simultaneously

All of these

K⁺ ions react with alkaline water and give K(OH)₃

KCl is a salt of strong acid and strong base.

Al(OH)₃ in alkaline condition gives [Al(OH)₄]^-

AlCl₃ is a salt of strong acid and weak base.

NH₃ is a covalent molecule.

 The metals of d–block form metallic or non–stoichiometric hydrides.

 Potassium hydride reacts violently with water.

All of these.

 Hydrogen economy is a technique of using dihydrogen in an efficient way.

Ni is used as catalyst in hydrogenation of vegetable oil to give edible fats.

 Syngas is a mixture of carbon monoxide and dihydrogen.

In a water gas shift reaction, CO will form as final product.

1.7%

34%

3.4%

13.6%

Gamma $\left(\gamma \right)$

Neutron (n)

Beta $\left({\beta }^{-}\right)$

Alpha $\left(\alpha \right)$

  The electrolysis of warm Ba(OH)₂ solution using Ni electrodes.

  The reaction of Zn with dilute HCl

  The electrolysis of brine solution.

  The electrolysis of acidified water using Pt electrodes.