Preparation of Dihydrogen

Which one of the following pairs of substances on reaction will not evolve ${\mathrm{H}}_2$ gas?

Given below are two reactions, involved in the commercial production of dihydrogen $\left({\mathrm{H}}_2\right)$. The two reactions are carried out at temperature “${\mathrm{T}}_1$” and “${\mathrm{T}}_2$”, respectively

$\mathrm{C}\left(\mathrm{s}\right)+{\mathrm{H}}_2\mathrm{O}\left(\mathrm{g}\right)\stackrel{{\mathrm{T}}_1}{⟶}\mathrm{CO}\left(\mathrm{g}\right)+{\mathrm{H}}_2\left(\mathrm{g}\right)$

$\mathrm{CO}\left(\mathrm{g}\right)+{\mathrm{H}}_2\mathrm{O}\left(\mathrm{g}\right)\frac{{\mathrm{T}}_2}{\mathrm{Catalyst}}{\mathrm{CO}}_2\left(\mathrm{g}\right)+{\mathrm{H}}_2\left(\mathrm{g}\right)$

The temperatures ${\mathrm{T}}_1$ and ${\mathrm{T}}_2$ are correctly related as

Given below are two statements :

Statement-I : Methane and steam passed over a heated $\mathrm{Ni}$ catalyst produces hydrogen gas.

Statement-II : Sodium nitrite reacts with ${\mathrm{NH}}_4\mathrm{Cl}$ to give ${\mathrm{H}}_2\mathrm{O}, {\mathrm{N}}_2$ and $\mathrm{NaCl}$.

In the light of the above statements, choose the most appropriate answer from the options given below :

Assertion: The water gas shift reaction can be used to increase the amount of ${\mathrm{H}}_2$, in the syngas mixture.

Reason: In this reaction, $\mathrm{CO}$ reduces stream to ${\mathrm{H}}_2$.

Explain which commercial process is followed for synthesis of highly pure dihydrogen gas.

Dihydrogen produced from electrolysis of barium hydroxide has a purity greater than _____.

_____ gas is liberated by the action of aluminium with concentrated solution of sodium hydroxide. (Name the gas)

In Bosch's process, hydrogen is prepared by mixing steam and $\mathrm{X}$ at $673 \mathrm{K}$ in the presence of $\mathrm{Y}$.

Identify $\mathrm{X}$ and $\mathrm{Y}$.

Which of the following is the metal that does not displace hydrogen from a boiling caustic soda solution?

Which of the following is the correct statement regarding industrial preparation of hydrogen from water gas?

Hydrogen is prepared in the laboratory by treating granular zinc with dilute ${\mathrm{H}}_2{\mathrm{SO}}_4$. Which of the following statements are true?

a. Dilute ${\mathrm{H}}_2{\mathrm{SO}}_4$ does not react with pure zinc.
b. $\mathrm{KOH}$ solution removes the impurities of ${\mathrm{PH}}_3$ and ${\mathrm{AsH}}_3$ from the evolved ${\mathrm{H}}_2$.
c. With pure zinc and dilute ${\mathrm{H}}_2{\mathrm{SO}}_4$, some ${\mathrm{CuSO}}_4$ has to be added.
d. Anhydrous ${\mathrm{CaCl}}_2$ is used to absorb moisture from evolved hydrogen.

The electrolysis of molten sodium hydride liberates hydrogen gas at the anode.

In Bosch's process, hydrogen is prepared by mixing steam and $\mathrm{X}$ at $673 \mathrm{K}$ in the presence of $\mathrm{Y}$.

Identify $\mathrm{X}$ and $\mathrm{Y}$.

Hydrogen is prepared in the laboratory by treating granular zinc with dilute ${\mathrm{H}}_2{\mathrm{SO}}_4$. Which of the following statements are true?

a. Dilute ${\mathrm{H}}_2{\mathrm{SO}}_4$ does not react with pure zinc.
b. $\mathrm{KOH}$ solution removes the impurities of ${\mathrm{PH}}_3$ and ${\mathrm{AsH}}_3$ from the evolved ${\mathrm{H}}_2$.
c. With pure zinc and dilute ${\mathrm{H}}_2{\mathrm{SO}}_4$, some ${\mathrm{CuSO}}_4$ has to be added.
d. Anhydrous ${\mathrm{CaCl}}_2$ is used to absorb moisture from evolved hydrogen.

Which of the following is the metal that does not displace hydrogen from a boiling caustic soda solution?

Which of the following is the correct statement regarding industrial preparation of hydrogen from water gas?

In water-gas shift reaction, hydrogen gas is produced from the reaction of steam with.

The metal that produces ${\mathrm{H}}_2$ with both dil $\mathrm{HCl}$ and $\mathrm{NaOH}\left(\mathrm{aq}\right)$ is

Hydrogen gas produced by heating $\mathrm{NaOH}$ with which metal :-

Hydrogen may be prepared by heating a solution of caustic soda with :