$NaH$ is an example of:

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

Give uses of Dihydrogen as a fuel.

Given below are two statements: one is labelled as Assertion $A$ and the other is labelled as Reason $R$.
Assertion $A:$ Hydrogen is an environment-friendly fuel.
Reason $R:$ Atomic number of hydrogen is $1$ and it is a very light element.
In the light of the above statements,choose the correct answer from the options given below:

In context with the industrial preparation of hydrogen from water gas $(CO + H_2)$,which of the following is the correct statement?

Justify the position of hydrogen in the periodic table on the basis of its electronic configuration.