MEDIUM
8th CBSE
IMPORTANT
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is the non-metal which is a good conductor of electricity.

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Important Questions on Materials: Metals and Non-Metals

MEDIUM
8th CBSE
IMPORTANT
LEARNING SCIENCE>Chapter 4 - Materials: Metals and Non-Metals>Exercise>Q 1

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The portion of grey nail which is inside the blue solution of copper sulphate becomes _____.

MEDIUM
8th CBSE
IMPORTANT
LEARNING SCIENCE>Chapter 4 - Materials: Metals and Non-Metals>Exercise>Q 2

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The change in colour of the dipped portion of the iron nail in copper sulphate solution is because of the deposition of _____.

MEDIUM
8th CBSE
IMPORTANT
LEARNING SCIENCE>Chapter 4 - Materials: Metals and Non-Metals>Exercise>Q 3

The portion of grey nail which is inside the blue solution of copper sulphate becomes reddish brown.

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The activity shows ______.

MEDIUM
8th CBSE
IMPORTANT
LEARNING SCIENCE>Chapter 4 - Materials: Metals and Non-Metals>Exercise>Q 1
What happens when a copper vessel is exposed to moist air for a long time?
MEDIUM
8th CBSE
IMPORTANT
LEARNING SCIENCE>Chapter 4 - Materials: Metals and Non-Metals>Exercise>Q 2
What is meant by 'rusting of iron'? 
MEDIUM
8th CBSE
IMPORTANT
LEARNING SCIENCE>Chapter 4 - Materials: Metals and Non-Metals>Exercise>Q 3
What is formed when non-metals react with oxygen?
MEDIUM
8th CBSE
IMPORTANT
LEARNING SCIENCE>Chapter 4 - Materials: Metals and Non-Metals>Exercise>Q 1

What happens when the following metals react with dilute hydrochloric acid?

(a) magnesium

MEDIUM
8th CBSE
IMPORTANT
LEARNING SCIENCE>Chapter 4 - Materials: Metals and Non-Metals>Exercise>Q 1

What happens when the following metals react with dilute hydrochloric acid?

(b) Aluminium