Materials: Metals And Non Metals Mock Tests

28 questions available

Materials: Metals And Non Metals Mock Test 1

Questions: 28

Sample Questions

Class 8 Science

Which of the following is used as a lubricant in machines?

A Graphite

B Sodium

C Iron

D Aluminium

Class 8 Science

Which metal is liquid at room temperature?

A Sodium

B Iron

C Mercury

D Magnesium

Class 8 Science

When iron nails are placed in copper sulphate solution, the solution turns green because:

A Copper is displaced from solution

B Iron displaces copper forming iron sulphate

C Iron dissolves without any reaction

D Copper sulphate decomposes

Class 8 Science

When zinc granules react with dilute sulphuric acid, hydrogen gas is produced. The correct observation is:

A The solution turns red

B Bubbles of gas form on the surface of zinc granules

C The solution becomes green

D A white precipitate forms

Class 8 Science

Which metal is the most abundant in the Earth's crust?

A Iron

B Aluminium

C Copper

D Gold

Class 8 Science

Which non-metal is stored in kerosene to prevent dangerous reactions?

A Sulphur

B Phosphorus

C Carbon

D Iodine

Class 8 Science

Which of the following is used as a lubricant in machines?

A Graphite

B Sodium

C Iron

D Aluminium

Class 8 Science

Which metal is liquid at room temperature?

A Sodium

B Iron

C Mercury

D Calcium

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