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10th CBSE
IMPORTANT
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Calcination is used to concentrate which ore

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Important Questions on Metals and Nonmetals

EASY
10th CBSE
IMPORTANT
Secondary Chemistry Class X>Chapter 3 - Metals and Nonmetals>Multiple Choice Questions (MCQ)>Q 18
A sulphide ore is concentrated by which process?
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10th CBSE
IMPORTANT
Secondary Chemistry Class X>Chapter 3 - Metals and Nonmetals>Multiple Choice Questions (MCQ)>Q 19
Which reducing agent can be used in the isolation of Mn from MnO2?
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10th CBSE
IMPORTANT
Secondary Chemistry Class X>Chapter 3 - Metals and Nonmetals>Multiple Choice Questions (MCQ)>Q 20
What is the colour of the flame imparted by a salt of barium chloride?
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10th CBSE
IMPORTANT
Secondary Chemistry Class X>Chapter 3 - Metals and Nonmetals>Multiple Choice Questions (MCQ)>Q 21
Brick-red colour is imparted to the flame of the burner by the salt of which metal?
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10th CBSE
IMPORTANT
Secondary Chemistry Class X>Chapter 3 - Metals and Nonmetals>Multiple Choice Questions (MCQ)>Q 22
An ore gives out CO2 on being treated with dilute hydrochloric acid. Which process should be used to concentrate this ore?
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10th CBSE
IMPORTANT
Secondary Chemistry Class X>Chapter 3 - Metals and Nonmetals>Multiple Choice Questions (MCQ)>Q 23
The mass percent of gold in a sample of 24 carat gold is 100. What is its mass percent in a sample of 18 carat gold?
EASY
10th CBSE
IMPORTANT
Secondary Chemistry Class X>Chapter 3 - Metals and Nonmetals>Multiple Choice Questions (MCQ)>Q 24
Copper will displace which one from its compound?