Defender 3 for grade VIII

Solvay process is a method to manufacture of _________

• a) lime water

• b) aerated water

• c) distilled water

• d) sodium carbonate

Carbon dioxide with water changes __________

• a) blue litmus to red

• b) red litmus to blue

• c) blue litmus to yellow

• d) doesn’t react with litmus

Dry ice is used as a ___________.

Aerated water is nothing but carbon dioxide dissolved in water under pressure. This is also called _________

­­­­_________ is neither combustible nor a supporter of combustion.

__________ is present in air to the extent of about 0.03% by volume

The process of conversion of solid into vapour without reaching liquid state is called ___________

Which of the following is known as azote?

• a) Oxygen

• b) Nitrogen

• c) Sulphur

• d) Carbon dioxide

Liquid nitrogen is used as a refrigerant.

• True

• False

Any process that converts nitrogen in the air into a useful nitrogen compound is called denitrification.

• True

• False