Science M C Q

Which one of the following has the highest latent heat of vaporization?

Aquatic plants make use of dissolved …………….. for photosynthesis.

…………….. from the air and sunlight destroy the germs present in water.

The process of adding chlorine in adequate amounts to water is called ……………..

Every litre of sea water contains …………….. grams of dissolved salts.

The freezing point of water …………….. with increase in pressure.

The boiling point of water increases with …………….. in pressure.

In the process of electrolysis of water, the positive carbon electrode acts as ……………..

In which one of the following states water is present on Earth?

What is the chemical formula of water?

Permanent hardness of water is due to the presence of _______.

Which of the following is a water pollutant?

The gas collected at the cathode on electrolysis of water is

Solubility of carbon dioxide in water is high when the

Water changes to ice at _____