MEDIUM
8th CBSE
IMPORTANT
Earn 100

When a copper object is exposed to moist air for a long time, then a green coating is formed on its surface. State whether the green coating is acidic or basic.

Important Questions on Materials: Metals and Non-Metals

MEDIUM
8th CBSE
IMPORTANT
Lakhmir Singh's SCIENCE FOR CLASS 8>Chapter 4 - Materials: Metals and Non-Metals>Short Answer Type Questions>Q 53
Sodium metal reacts vigorously with water.
Name the gas evolved when sodium reacts with water.
HARD
8th CBSE
IMPORTANT
Lakhmir Singh's SCIENCE FOR CLASS 8>Chapter 4 - Materials: Metals and Non-Metals>Short Answer Type Questions>Q 53
Sodium metal reacts vigorously with water.
State whether the Solution formed by the reaction of sodium with water is acidic or basic.
MEDIUM
8th CBSE
IMPORTANT
Lakhmir Singh's SCIENCE FOR CLASS 8>Chapter 4 - Materials: Metals and Non-Metals>Short Answer Type Questions>Q 54
How do metals react with dilute acids? Explain with the help of an example.
MEDIUM
8th CBSE
IMPORTANT
Lakhmir Singh's SCIENCE FOR CLASS 8>Chapter 4 - Materials: Metals and Non-Metals>Short Answer Type Questions>Q 55
What would you observe when a strip of zinc is placed in copper sulphate Solution? Write a word equation of the reaction which takes place.
MEDIUM
8th CBSE
IMPORTANT
Lakhmir Singh's SCIENCE FOR CLASS 8>Chapter 4 - Materials: Metals and Non-Metals>Short Answer Type Questions>Q 56
Can copper displace iron from iron sulphate Solution? Give reason for your answer.
MEDIUM
8th CBSE
IMPORTANT
Lakhmir Singh's SCIENCE FOR CLASS 8>Chapter 4 - Materials: Metals and Non-Metals>Short Answer Type Questions>Q 57
Name one metal which can displace iron from iron sulphate solution. (Cobalt / Zinc / Copper)
MEDIUM
8th CBSE
IMPORTANT
Lakhmir Singh's SCIENCE FOR CLASS 8>Chapter 4 - Materials: Metals and Non-Metals>Short Answer Type Questions>Q 57
Name one metal which cannot displace iron from iron sulphate solution. (Zinc/copper)
MEDIUM
8th CBSE
IMPORTANT
Lakhmir Singh's SCIENCE FOR CLASS 8>Chapter 4 - Materials: Metals and Non-Metals>Short Answer Type Questions>Q 58
Can you store lemon pickle in an aluminium utensil? Explain.