In the preparation of hydrogenated oil the chemical reaction involving hydrogen is called:

(1) hydrogenation

(2) reduction

(3) dehydration

(4) oxidation

The most abundant isotope of hydrogen is:

(1) tritium

(2) deuterium

(3) protium

(4) para-hydrogen

Hydrogen is evolved by the action of cold dilute HNO₃ on:

(1) Fe

(2) Mg or Mn

(3) Cu

(4) Al

A molten ionic hydride on electrolysis gives:

1. H⁺ ion moving towards the cathode

2. H⁺ ion moving towards the anode

3. H₂ is liberated at anode

4. H₂ is liberated at cathode

Which statement is not correct for hydrogen peroxide ?

(1) Pure H₂O₂ is fairly stable

(2) It sometimes acts as a reducing agent

(3) It acts as an oxidising agent

(4) Aqueous solution of H₂O₂ is weakly basic

In solid hydrogen, the intermolecular bonding is:

(1) ionic

(2) van der Waals'

(3) metallic

(4) covalent

The lightest gas is :

(1) nitrogen

(2) helium

(3) oxygen

(4) hydrogen

Benzene is oxidized by H₂O₂ in presence of FeSO₄ to:

(1) phenol

(2) cyclohexane

(3) benzaldehyde

(4)benzoic acid

The oxidizing property of H₂O₂ is best explained by assuming that two oxygen atoms in its molecule are:

(1) bonded differently

(2) bonded similarly

(3) bonded covalently

(4) bonded by hydrogen bonds

10 volumes of H₂O₂ has a strength of approximately:

(1) 3%

(2) 30%

(3) 10%

(4) 5%