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Class 8

Explore popular questions from Materials: Metals and NonMetals for Class 8. This collection covers Materials: Metals and NonMetals previous year Class 8 questions hand picked by experienced teachers.

Materials: Metals and NonMetals

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Q 1. Which of the following properties is generally not shown by metals?

A

Ductility

B

Sonorous

Dullness

D

Electrical conduction

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Q 2. The most abundant element in the universe is:

hydrogen

B

oxygen

C

helium

D

carbon

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Q 3. Which of the following non-metal is a liquid?

A

Sulphur

B

Phosphorus

C

Carbon

Bromine

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Q 4. The liquid metal at room temperature is:

Mercury

B

Bromine

C

Sodium

D

Gold

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Q 5. The metal which is stored in kerosene:

A

Phosphorus

B

Magnesium

Sodium

D

Zinc

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Q 6. Materials around us can be classified into:

A

Elements and compounds

Metals and non-metals

C

Acids and bases

D

None of these

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Q 7. All metals are solids except:

A

Sodium

B

Calcium

Mercury

D

Hydrogen

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Q 8. Metal oxides are of nature:

A

Acidic

Basic

C

Neutral

D

All of these

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Q 9. The metal which can be cut with a knife:

Sodium and potassium

B

Barium and calcium

C

Sodium and mercury

D

Potassium and calcium

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Q 10. When non-metals react with water then:

A

Hydrogen gas is formed

B

Carbon dioxide gas is formed

Non-metals do not react with water

D

None of these

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Q 11. The metal which is liquid at room temperature is

A

sodium

B

bromine

C

calcium

mercury

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Q 12. Which one of the following metal is the most ductile?

A

Aluminium

B

Copper

C

Silver

Gold

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Q 13. Which one of the following metal is the most reactive and stored in kerosene?

A

Iron

B

Gold

C

Copper

Potassium

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Q 14. Name the gas evolved when magnesium reacts with dilute hydrochloric acid.

A

Chlorine

B

Oxygen

Hydrogen

D

Nitrogen

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Q 15. The metal which is not corroded by air, water and acid is

A

copper

B

zinc

C

aluminium

gold

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Q 16. Metals are

A

soft and brittle

hard and solid

C

liquid

D

generally liquid

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Q 17. Materials having qualities of both metals and non-metals are

A

alloys

metalloids

C

noble metals

D

none of these

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Q 18. Which metal reacts readily with cold water?

A

Gold

B

Silver

C

Magnesium

Calcium

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Q 19. The best electrical conductor is

A

gold

B

copper

silver

D

aluminium

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Q 20. Boron is

A

metal

metalloid

C

non-metal

D

alkali

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Q 21. Which of the following element is not found in free state in the nature?

A

Silver

B

Copper

Sodium

D

Gold

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Q 22. The difference between Pig and Wrought iron is as follows :

A

Pig iron is pure and Wrought iron is impure

B

Both Pig and Wrought iron are highly impure

C

Both Pig and Wrought iron are pure

Pig iron is impure and wrought iron is pure to a large extent

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Q 23. Epsom salt is

A

{tex}CuSO_4{/tex}

{tex}MgSO_4·7H_2O{/tex}

C

{tex}NH_2CONH_2{/tex}

D

{tex}(NH_4)_2SO4{/tex}

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Q 24. An ore gives off {tex}SO_2{/tex} when heated with {tex}O_2{/tex} This ore is concentrated by -

A

gravity separation method

B

magnetic separation method

froth flotation method

D

chemical method

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Q 25. Copper is extracted from the ore copper pyrite by smelting in a blast furnace. The flux used and the slag formed are as given below:

A

Flux CaO, Slag {tex}CaSiO_3{/tex}

B

Flux {tex}SiO_2{/tex}, Slag {tex}CaSiO_3{/tex}

C

Flux FeO, Slag {tex}FeSiO_3{/tex}

Flux {tex}SiO_2{/tex}, Slag {tex}FeSiO_3{/tex}