An ionic compound is dissolved simultaneously in heavy water and ordinary water, its solubility is –
1. Larger in heavy water
2. Smaller in heavy water
3. Solubility is same in both waters
4. Smaller in simple water
has higher boiling point than because.
(1) is a smaller molecule and hence more closely packed
(2) The bond angle in is more than in and hence the former molecules are more tightly packed
(3) Of intermolecular hydrogen bonding in liquid
(4) The latent heat of vaporisation is higher for than for
The maximum possible number of hydrogen bonds a water molecule can form is –
(1) 2
(2) 4
(3) 3
(4) 1
Assertion: is called heavy water.
Reason : Its degree of dissociation is high.
Of the two solvents , NaCl dissolves:
(1) equally in both
(2) only in
(3) more in
(4) more in
Heavy water is ......% heavier than ordinary water
1. 11
2. 20
3. 25
4. 15
Pure water can be obtained from sea water by:
1. Centrifugation
2. Plasmolysis
3. Reverse osmosis
4. Sedimentation
The correct order of hydrogen bonding among , H2O and HF, is
1. HF > >
2. > HF >
3. HF > >
4. > HF >
The term ’auto-protolysis’ of water means :
1. | Physical reaction in which two water molecules react to produce a hydroxide ion (OH–) and a hydronium ion (). |
2. | Chemical reaction in which five water molecules react to produce a hydroxide ion (OH–) and a hydronium ion (). |
3. | Chemical reaction in which two water molecules react to produce a hydroxide ion (OH–) and a hydronium ion (). |
4. | Chemical reaction in which two water molecules react to produce three hydroxide ions (OH–) |