In the preparation of hydrogenated oil the chemical reaction involving hydrogen is called:
The most abundant isotope of hydrogen is:
(c) Protium is 1H1.
Hydrogen is evolved by the action of cold dilute HNO3 on:
(b) Mg or Mn
(b) Only Mg and Mn react with cold dil. HNO3 to give H2.
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
(c) Ionic hydride has H- ion.
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
(d) H2O2 is weak di-basic acid
In solid hydrogen, the intermolecular bonding is:
(b) van der Waals'
(b) Covalent molecules occupy solid structure due to increasing van der Waals' forces.
The lightest gas is :
(d) H2 has lowest molecular weight.
The critical temperature of water is higher than that of O2 because H2O molecule has:
(a) fewer electrons than oxygen
(b) two covalent bonds
(d) dipole moment
(d) Dipole-dipole attraction give rise to more tendency for aggregation.
Benzene is oxidized by H2O2 in presence of FeSO4 to:
(d) benzoic acid
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
(a) It is a fact