HARD
Earn 100

What are the various kinds of solvents?

Important Questions on Role of Substances in Environment

EASY

Turpentine oil in paints is used as a-

MEDIUM

Polythene bags are non-biodegradable. They collect in our surroundings and pollute the soil and water. Old cotton fabric and even old denim cloth can be used to make bags to carry vegetables, fruits, milk sachets and other household items. This would reduce the use of polythene bags.

Do you think polythene bags make your surroundings unclean?

EASY
Paint is used for better look and to avoid corrosion.
MEDIUM
What is an antacid? How does an antacid work? Name any one antacid.
MEDIUM

Polythene bags are non-biodegradable. They collect in our surroundings and pollute the soil and water. Old cotton fabric and even old denim cloth can be used to make bags to carry vegetables, fruits, milk sachets and other household items. This would reduce the use of polythene bags.

Should vegetable vendors and shopkeepers sell goods in polythene bags?

HARD

Explain what you see in the following picture

Question Image

MEDIUM
Lithopone, a substitute of white lead is
MEDIUM
Paints are made of compounds of _____.
EASY

The fibres that are waterproof, wrinkle-proof and long-lasting are called:

HARD
Name the products on which powder coating can be done.
MEDIUM

Give scientific explanation:

The particles of powder are given an electric charge while spraying them to form the powder coating.

MEDIUM
Antacid tablets are used by a person suffering from stomach pain, why?
MEDIUM

Consider the following statements regarding aluminium paint.

I. It is a fairly good heat-resistant.

II. It possesses good electrical resistance.

III. It can be used for hot water pipes.

Which of the statements given above is/are correct?