EASY
9th CBSE
IMPORTANT
Earn 100

Who proposed the law of conservation of mass? (Joseph L Proust/ Antoine L. Lavoisier/ John Dalton)

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Important Questions on Atoms and Molecules

EASY
9th CBSE
IMPORTANT
Chemistry for Class IX>Chapter 3 - Atoms and Molecules>Exercise>Q 3

Who proposed the law of definite proportion?(Joseph L Proust/John Dalton)

HARD
9th CBSE
IMPORTANT
Chemistry for Class IX>Chapter 3 - Atoms and Molecules>Exercise>Q 4
State the law of conservation of mass. Give one example to illustrate this law.
EASY
9th CBSE
IMPORTANT
Chemistry for Class IX>Chapter 3 - Atoms and Molecules>Exercise>Q 5

Name the scientist who gave the atomic theory of matter. (John Dalton/ Ernest Rutherford)

EASY
9th CBSE
IMPORTANT
Chemistry for Class IX>Chapter 3 - Atoms and Molecules>Exercise>Q 6

Which postulate of Dalton's atomic theory can explain the law of conservation of mass?

MEDIUM
9th CBSE
IMPORTANT
Chemistry for Class IX>Chapter 3 - Atoms and Molecules>Exercise>Q 7

Which postulate of Dalton's atomic theory can explain the law of constant proportion?

MEDIUM
9th CBSE
IMPORTANT
Chemistry for Class IX>Chapter 3 - Atoms and Molecules>Exercise>Q 8

Give one major drawback of Dalton's atomic theory of matter.

EASY
9th CBSE
IMPORTANT
Chemistry for Class IX>Chapter 3 - Atoms and Molecules>Exercise>Q 9
What are the building blocks of matter?
EASY
9th CBSE
IMPORTANT
Chemistry for Class IX>Chapter 3 - Atoms and Molecules>Exercise>Q 10

Define 'atom'.