MEDIUM
8th CBSE
IMPORTANT
Earn 100

Arrange the following metals in the decreasing order of chemical reactivity, placing the most reactive element first, copper, magnesium, iron, sodium, calcium, zinc.

Important Questions on Metals and Non-Metals

MEDIUM
8th CBSE
IMPORTANT
I Explore 3rd EDITION A Science Textbook 8>Chapter 4 - Metals and Non-Metals>Check Point>Q 3
Name two metals that occur in free state in nature. What is the method of refining them?
MEDIUM
8th CBSE
IMPORTANT
I Explore 3rd EDITION A Science Textbook 8>Chapter 4 - Metals and Non-Metals>Check Point>Q 4

Explain the chemical change that causes corrosion of iron.

MEDIUM
8th CBSE
IMPORTANT
I Explore 3rd EDITION A Science Textbook 8>Chapter 4 - Metals and Non-Metals>Check Point>Q 5

If an iron nail is left in a filled bottle of boiled water, how long will it take to corrode?

EASY
8th CBSE
IMPORTANT
I Explore 3rd EDITION A Science Textbook 8>Chapter 4 - Metals and Non-Metals>EXERCISES>Q A
Which non-metal is used in making pencils?
EASY
8th CBSE
IMPORTANT
I Explore 3rd EDITION A Science Textbook 8>Chapter 4 - Metals and Non-Metals>EXERCISES>Q A
Which non-metal is found mainly in free state in atmosphere?
EASY
8th CBSE
IMPORTANT
I Explore 3rd EDITION A Science Textbook 8>Chapter 4 - Metals and Non-Metals>EXERCISES>Q A
Which of the following is a metalloid?
MEDIUM
8th CBSE
IMPORTANT
I Explore 3rd EDITION A Science Textbook 8>Chapter 4 - Metals and Non-Metals>EXERCISES>Q A
Which metal is used in dry cells?
EASY
8th CBSE
IMPORTANT
I Explore 3rd EDITION A Science Textbook 8>Chapter 4 - Metals and Non-Metals>EXERCISES>Q A
Which of the following represents gold of 50 per cent purity?