Select the correct word from the words in brackets to complete each sentence :

1. If pressure on the surface of water increases it's boiling point …………… and freezing point …………… [increases/decreases].
2. A saturated solution can be converted to an unsaturated solution by …………… [increasing/decreasing] the amount of the solvent.
3. Dissolved air in water contains a …………… [higher/lower] percentage of oxygen than ordinary air.
4. At low temperatures the solubility of a gas in water is …………… [less/more] compared to that at ordinary temperatures.
5. Efflorescence occurs when the vapour pressure of the hydrated crystals is …………… [more/less] than the vapour pressure of the atmospheric humidity.

1. If pressure on the surface of water increases it's boiling point increases and freezing point decreases.
2. A saturated solution can be converted to an unsaturated solution by increasing the amount of the solvent.
3. Dissolved air in water contains a higher percentage of oxygen than ordinary air.
4. At low temperatures the solubility of a gas in water is more compared to that at ordinary temperatures.
5. Efflorescence occurs when the vapour pressure of the hydrated crystals is more than the vapour pressure of the atmospheric humidity.