Science Quiz 49

This is a timed quiz. You will be given 15 seconds per question. Are you ready?

Which metal pollute the air of a big city?

Chromium

Cadmium

both (a) & (b)

Lead

Correct! Wrong!

Potassium Permanganate is used for purifying drinking water, because?

It is an oxidizing agent

It is a reducing agent

It is a sterilizing agent

None

Correct! Wrong!

The most important ore of aluminium is?

Calcite

Bauxite

Calamine

None of these

Correct! Wrong!

Which of the following does not contain a coinage metal?

Zinc and Gold

Silver and Gold

None of these

Copper and Silver

Correct! Wrong!

The property of a substance to absorb moisture from the air on exposure is called ?

Efflorescence

Deliquescence

Osmosis

None of these

Correct! Wrong!

From which mineral is radium obtained?

Limestone

Pitch blende

Haematite

none

Correct! Wrong!

Heavy water is?

Carbon monoxide

Sulphur dioxide

Deuterium oxide

All of these

Correct! Wrong!

Permanent hardness of water can be removed by adding?

Silver and Gold

Chlorine

Washing soda

None of these

Correct! Wrong!

Science Quiz 49

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