Chapter 3: Atoms and Molecules MCQs | science Class 9 CBSE

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Question 1

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Who gave the Atomic Theory?

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Question 2

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Which law states that mass is conserved during chemical reactions?

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Question 3

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Which of the following is a molecule of a compound?

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Question 4

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Symbol for gold is:

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Question 5

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Which of the following is a cation?

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Question 6

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Valency of oxygen is:

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Question 7

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Atomic mass of carbon is:

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Question 8

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Formula of calcium hydroxide is:

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Question 9

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Which of the following is polyatomic ion?

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Question 10

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Molecular mass of water is:

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Question 11

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Which of these is not an element symbol based on Latin name?

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Question 12

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What is the symbol for iron?

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Question 13

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Chemical formula of sodium carbonate is:

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Question 14

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Which has the highest atomic mass?

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Question 15

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Anion is formed by:

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Question 16

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Which of these is not a molecule of element?

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Question 17

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What is the valency of chlorine?

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Question 18

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Which one of these is triatomic?

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Question 19

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Formula of aluminum oxide is:

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Question 20

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One atomic mass unit (u) is equal to:

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Chapter sections

Chapter 3: Atoms and Molecules | MCQs

Who gave the Atomic Theory?

Which law states that mass is conserved during chemical reactions?

Which of the following is a molecule of a compound?

Symbol for gold is:

Which of the following is a cation?

Valency of oxygen is:

Atomic mass of carbon is:

Formula of calcium hydroxide is:

Which of the following is polyatomic ion?

Molecular mass of water is:

Which of these is not an element symbol based on Latin name?

What is the symbol for iron?

Chemical formula of sodium carbonate is:

Which has the highest atomic mass?

Anion is formed by:

Which of these is not a molecule of element?

What is the valency of chlorine?

Which one of these is triatomic?

Formula of aluminum oxide is:

One atomic mass unit (u) is equal to:

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