Question

Short note on hydrogen is relatively inert in room temperature

Answer 1

Hydrogen is relatively inert at room temperature because it exists in diatomic form (H2 or H--H bond). Usually, two hydrogens are bonded as H-H bond. So, in order for hydrogen to react with other atoms, the H--H bond has to break. 

This bond breakage requires energy. The energy required to break this bind is not available at room temperature. Due to this reason, the H-H bond is difficult to break at room temperature.

Thus, hydrogen is relatively inert at room temperature.

Answer 2

Hydrogen is available as H2 or dinitrogen. The two molecules of hydrogen are appended by a triple bond between them which is exceptionally solid.

To break such a solid vitality bond gigantic energy is required which isn't accessible under inert conditions.

Atomic hydrogen can respond with numerous components and mixes, yet at room temperature, the response rates are normally so low as to be unimportant.

That is the reason hydrogen is inactive at room temperature.