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CBSE 8th Science Materials: Metals and Non-Metals Model Questions Papers Study Material - QB365 Set A

Published on: 21/10/2025

Question Set A

CBSE 8th Science Materials: Metals and Non-Metals Model Questions Papers Study Material - QB365

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Std: 8th Standard CBSE - Science

chapter: Materials: Metals and Non-Metals - Model Questions Papers

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Questions:

Generic 2

3 x 2 = 6

Sodium metal is kept in kerosene but not in water. Why

Ductility is the property of metals. What do you mean by ductility?

Name two soft metals which can be cut with a knife

Multiple Choice Question

6 x 1 = 6

Some metals react with bases to produce gas:

(a)

Oxygen

(b)

Nitrogen

(c)

Hydrogen

(d)

Carbon dioxide

Which of the following can be beaten into thin sheets?

(a)

Zinc

(b)

Phosphorus

(c)

Sulphur

(d)

Oxygen

The non-metal which is liquid at room temperature is

(a)

iodine

(b)

chlorine

(c)

carbon

(d)

bromine

The most reactive metal is

(a)

gold

(b)

copper

(c)

potassium

(d)

zinc

Metals generally react with dilute acids to produce hydrogen gas. Which one of the following metals does not react with dilute hydrochloric acid?

(a)

Magnesium

(b)

Aluminium

(c)

Iron

(d)

Copper

Which of the following is not a metal?

(a)

Copper

(b)

Sulphur

(c)

Aluminium

(d)

Iron

Generic 3

1 x 3 = 3

10.

What do you understand by displacement reactions? What happens when copper sulphate reacts with zinc? Explain this reaction also.

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Answers Key:

Generic 2

3 x 2 = 6

Sodium metal is highly reactive metal, when exposed in air, it starts to burn to form oxide. In the same way, it forms hydroxide with water. It does not react with kerosene. So, to prevent it, it is kept in kerosene not in water.

The property of metals by which they can be drawn into wires is called ductility.

Metals which can easily cut with a knife.These are soft metals.
(i) Sodium
(ii) Potassium.

Multiple Choice Question

6 x 1 = 6

Zinc can be beaten into thin sheets because zinc is a metal, while phosphorus, sulphur and oxygen are non-metals

(b)
copper

(d)
Copper

(b)
Sulphur

Generic 3

1 x 3 = 3

10.

When a more reactive element displaces a less reactive element or molecule from its salt, such reactions are called displacement reactions. These reactions can be well explained in metals. When in copper sulphate solution zinc granules are added, the blue colour of copper sulphate disappears and a powdery red mass of copper is deposited at the bottom of the beaker. The reaction can be represented as follows:
\(\underset{(Blue)}{CuSO_4}+Zn⟶\underset{(Colourless)}{ZnSO_4}+\underset{(Red)}{Cu}\)