MEDIUM
8th CBSE
IMPORTANT
Earn 100

Phosphorus is kept in water. Why?

Important Questions on Materials: Metals and Non-metals

MEDIUM
8th CBSE
IMPORTANT
All in One - SCIENCE CBSE Class 8>Chapter 4 - Materials: Metals and Non-metals>Chapter Test>Q 12

What is the nature of oxides formed,

(a) when metals combine with oxygen?

(b) when non-metals combine with oxygen?

MEDIUM
8th CBSE
IMPORTANT
All in One - SCIENCE CBSE Class 8>Chapter 4 - Materials: Metals and Non-metals>Chapter Test>Q 13
Give reason why copper cannot displace zinc from its salt solution.
EASY
8th CBSE
IMPORTANT
All in One - SCIENCE CBSE Class 8>Chapter 4 - Materials: Metals and Non-metals>Chapter Test>Q 14
Define

(i) Malleability    (ii) Ductility

EASY
8th CBSE
IMPORTANT
All in One - SCIENCE CBSE Class 8>Chapter 4 - Materials: Metals and Non-metals>Chapter Test>Q 14
Name a non-metal which is very hard.
MEDIUM
8th CBSE
IMPORTANT
All in One - SCIENCE CBSE Class 8>Chapter 4 - Materials: Metals and Non-metals>Chapter Test>Q 15

Give reasons, why

(a) immersion rods for heating liquids are made up of metallic substances?

(b) non-metals cannot be used for making bells?

HARD
8th CBSE
IMPORTANT
All in One - SCIENCE CBSE Class 8>Chapter 4 - Materials: Metals and Non-metals>Chapter Test>Q 16

Distinguish between metals and non-metals on the basis of their chemical properties.


MEDIUM
8th CBSE
IMPORTANT
All in One - SCIENCE CBSE Class 8>Chapter 4 - Materials: Metals and Non-metals>Chapter Test>Q 17

State five uses of each metals and non-metals.

MEDIUM
8th CBSE
IMPORTANT
All in One - SCIENCE CBSE Class 8>Chapter 4 - Materials: Metals and Non-metals>Chapter Test>Q 18

Write the conditions under which rusting takes place.