Science Quiz 143

This is a timed quiz. You will be given 120 seconds to answer all questions. Are you ready?

120

Which of the following is used in pencils ?

Graphite

Charcoal

Silicon

None of these

Correct! Wrong!

Which of the following does not contain a coinage metal?

Zinc and Gold

Copper and Silver

Silver and Gold

All of these

Correct! Wrong!

Washing soda is the common name for?

Calcium bicarbonate

Sodium carbonate

Sodium bicarbonate

None

Correct! Wrong!

The most important ore of aluminium is?

Calcite

Bauxite

Calamine

None

Correct! Wrong!

Brass gets discolored in air because of the presence of which of the following gases in air?

Hydrogen sulphide

Carbondioxide

Nitrogen

None

Correct! Wrong!

From which mineral is radium obtained?

Haematite

Limestone

Pitchblende

None

Correct! Wrong!

Amalgams are?

Alloys which contain mercury as one of the contents

Highly colored alloys

Alloys which have great resistance to abrasion

None

Correct! Wrong!

Permanent hardness of water can be removed by adding?

Chlorine

Washing soda

Xenon

All of the above

Correct! Wrong!

Science Quiz 143

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