MEDIUM
8th CBSE
IMPORTANT
Earn 100

Give reason for the following:

Iron cannot displace zinc from its solution.

Important Questions on Metals and Non-Metals

MEDIUM
8th CBSE
IMPORTANT
Galaxy A Course in Science Book 8>Chapter 4 - Metals and Non-Metals>Put on your thinking cap>Q 8

Give reason for the following:

A copper vessel acquires a dull green coating if exposed to moist air for long.

MEDIUM
8th CBSE
IMPORTANT
Galaxy A Course in Science Book 8>Chapter 4 - Metals and Non-Metals>Put on your thinking cap>Q 8

Give reason for the following:

Silver jewellery turns dark over a period of time.

MEDIUM
8th CBSE
IMPORTANT
Galaxy A Course in Science Book 8>Chapter 4 - Metals and Non-Metals>Put on your thinking cap>Q 9
How would you find out whether a chunk of solid element is a metal or a non-metal?
HARD
8th CBSE
IMPORTANT
Galaxy A Course in Science Book 8>Chapter 4 - Metals and Non-Metals>Put on your thinking cap>Q 9
What are displacement reactions? Give examples.
MEDIUM
8th CBSE
IMPORTANT
Galaxy A Course in Science Book 8>Chapter 4 - Metals and Non-Metals>Put on your thinking cap>Q 9
What happens when hydrochloric acid is poured on a copper plate? Which gas is produced? How do you test it?
MEDIUM
8th CBSE
IMPORTANT
Galaxy A Course in Science Book 8>Chapter 4 - Metals and Non-Metals>Put on your thinking cap>Q 10
Name the four non-metals which are important for the sustenance of life. Mention their importance in life. Also, mention the uses of some other non-metals.
MEDIUM
8th CBSE
IMPORTANT
Galaxy A Course in Science Book 8>Chapter 4 - Metals and Non-Metals>Put on your thinking cap>Q 10
What happens when sodium reacts with water? State the equation to represent the reaction.
MEDIUM
8th CBSE
IMPORTANT
Galaxy A Course in Science Book 8>Chapter 4 - Metals and Non-Metals>Put on your thinking cap>Q 10
What are malleability and ductility? Give any two examples.