Hydrogen

The equation that represents the water - gas shift reactions is:

Dihydrogen of high purity ( > 99.95%) is obtained through:

Consider the following compound (X)

The most stable and least stable carbon radicals, respectively, produced by homolytic cleavage of corresponding C – H bond are :

The one that is NOT suitable for the removal of permanent hardness of water is:

Hydrogen peroxide, in the pure state, is:

Among statements (a) - (d), the correct ones are
(a) decomposition of hydrogen peroxide gives dioxygen.
(b) like hydrogen peroxide, compounds such as ${\mathrm{K}\mathrm{C}\mathrm{l}\mathrm{O}}_3,\mathrm{P}\mathrm{b}{\left({\mathrm{N}\mathrm{O}}_3\right)}_2$ and ${\mathrm{N}\mathrm{a}\mathrm{N}\mathrm{O}}_3$  when heated liberated dioxygen.
(c) 2-Ethylanthraquinone is useful for the industrial preparation of hydrogen peroxide
(d) Hydrogen peroxide is used for the manufacture of sodium perborate

In comparison to the zeolite process for the removal of permanent hardness, the synthetic resins method is

Statements about heavy water are given below

(a) Heavy water is used in exchange reaction for the study of reaction mechanisms.

(b) Heavy water is prepared by exhaustive electrolysis of water

(c) Heavy water has higher boiling point than ordinary water.

(d) Viscosity of H₂O is greater than D₂O.

Choose the most appropriate answer from the options given below: