EASY
9th CBSE
IMPORTANT
Earn 100

State the law of constant composition.

Important Questions on Atoms and Molecules

MEDIUM
9th CBSE
IMPORTANT
Secondary Chemistry>Chapter 3 - Atoms and Molecules>Problems for Proficiency>Q 6
Write the main postulates of Dalton's atomic theory.
EASY
9th CBSE
IMPORTANT
Secondary Chemistry>Chapter 3 - Atoms and Molecules>Problems for Proficiency>Q 7
The type and number of atoms in a compound are _____ irrespective of source.
EASY
9th CBSE
IMPORTANT
Secondary Chemistry>Chapter 3 - Atoms and Molecules>Problems for Proficiency>Q 7
In a chemical reaction the mass is _____. [conserved / variable]
EASY
9th CBSE
IMPORTANT
Secondary Chemistry>Chapter 3 - Atoms and Molecules>Problems for Proficiency>Q 7
Law of conservation of mass was proposed by _____. (Lavoisier / Dalton)
EASY
9th CBSE
IMPORTANT
Secondary Chemistry>Chapter 3 - Atoms and Molecules>Problems for Proficiency>Q 7
Law of constant proportion was proposed by _____. (Proust /John Dalton / Lavoisier)
EASY
9th CBSE
IMPORTANT
Secondary Chemistry>Chapter 3 - Atoms and Molecules>Problems for Proficiency>Q 7
Choose the correct word from the brackets to fill in the blank.
The atomic theory of matter was proposed by _____. (Dalton / Bohr / Rutherford)
EASY
9th CBSE
IMPORTANT
Secondary Chemistry>Chapter 3 - Atoms and Molecules>Problems for Proficiency>Q 1

Write the atomic symbol of each one of the following elements:
Carbon, chlorine

EASY
9th CBSE
IMPORTANT
Secondary Chemistry>Chapter 3 - Atoms and Molecules>Problems for Proficiency>Q 1

Write the atomic symbol of each one of the following elements:

Sodium, Sulphur