CHEMISTRY TRUE / FALSE

Liquid oxygen is used for burning fuel in spaceships.

Enamelling is the process of baking a mixture of silicates on the surface of aluminium at a high temperature.

The rust formed on the surface of iron easily crumbles.

Under laboratory conditions, the oxygen gas is insoluble in water.

The catalyst used in laboratory preparation of oxygen gas from hydrogen peroxide gas is magnesium oxide

The trapping of solar heat energy in the earth’s atmosphere is called greenhouse effect.

Write ‘True’ or ‘False’ in front of following statement.
The area where a lot of fuel burns has more percentage of carbon dioxide.

Nitrogen is a gaseous non-metal essential for respiration.

Water containing dissolved carbon dioxide can dissolve marble.

Atmospheric nitrogen is directly absorbed by the plants to form plant proteins.