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
Density of water is maximum at:
(b) 100 C
(d) 0 K
Metal which does not react with cold water but evolves H2 with steam is:
An ionic compound is dissolved simultaneously in heavy water and ordinary water, its solubility is –
(A) Larger in heavy water
(B) Smaller in heavy water
(C) Solubility is same in both waters
(D) Smaller in simple water
has higher boiling point than because.
(A) is a smaller molecule and hence more closely packed
(B) The bond angle in is more than in and hence the former molecules are more tightly packed
(C) Of intermolecular hydrogen bonding in liquid
(D) The latent heat of vaporisation is higher for than for
The maximum possible number of hydrogen bonds a water molecule can form is –
Assertion: is called heavy water.
Reason : Its degree of dissociation is high.