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

(a) hydrogenation

(b) reduction

(c) dehydration

(d) oxidation

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The most abundant isotope of hydrogen is:

(a) tritium

(b) deuterium

(c) protium

(d) para-hydrogen

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

(a) Fe

(b) Mg or Mn

(c) Cu

(d) Al

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A molten ionic hydride on electrolysis gives:

(a) H+ ion moving towards the cathode

(b) H+ ion moving towards the anode

(c) H2 is liberated at anode

(d) H2 is liberated at cathode

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Which statement is not correct for hydrogen peroxide ?

(a) Pure H2O2 is fairly stable

(b) It sometimes acts as a reducing agent

(c) It acts as an oxidising agent

(d) Aqueous solution of H2O2 is weakly basic

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In solid hydrogen, the intermolecular bonding is:

(a) ionic

(b) van der Waals'

(c) metallic

(d) covalent

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The lightest gas is :

(a) nitrogen

(b) helium

(c) oxygen

(d) hydrogen

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The critical temperature of water is higher than that of O2 because H2O molecule has:

(a) fewer electrons than oxygen

(b) two covalent bonds

(c) V-shape

(d) dipole moment

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Benzene is oxidized by H2O2 in presence of FeSO4 to:

(a) phenol

(b) cyclohexane

(c) benzaldehyde

(d) benzoic acid

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

(a) bonded differently

(b) bonded similarly

(c) bonded covalently

(d) bonded by hydrogen bonds

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