Science Quiz 107

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

Carbon, diamond and graphite are together called?

Isotopes

Isomers

Allotropes

None

Correct! Wrong!

The two elements that are frequently used for making transistors are?

Boron and aluminium

Silicon and germanium

Iridium and tungsten

None

Correct! Wrong!

Sodium metal is kept under?

Kerosene

Alcohol

Water

None

Correct! Wrong!

Among the various allotrope of carbon?

Diamond is the hardest, lamp black is the softest

Diamond is the hardest, graphite is the softest

Diamond is the hardest, coke is the softest

All of the above

Correct! Wrong!

Potassium nitrate is used in?

Salt

Fertilizer

Medicine

None

Correct! Wrong!

Most soluble in water is?

Sugar

Sulphur

Common salt

None

Correct! Wrong!

What is laughing gas?

Nitrous Oxide

Carbon monoxide

Sulphur dioxide

None of these

Correct! Wrong!

In which of the following activities silicon carbide is used?

Cutting very hard substances

Disinfecting water of ponds

Making cement and glass

All of these

Correct! Wrong!

Science Quiz 107

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