EASY
9th CBSE
IMPORTANT
Earn 100

Calculate the molecular mass of the following compound:

Hydrogen sulphide, H2S

Important Questions on Atoms and Molecules

EASY
9th CBSE
IMPORTANT
Science for Ninth class Part 2 Chemistry>Chapter 3 - Atoms and Molecules>Short Answer Type Questions>Q 50

Calculate the molecular mass of the following compound:

Carbon disulphide, CS2

EASY
9th CBSE
IMPORTANT
Science for Ninth class Part 2 Chemistry>Chapter 3 - Atoms and Molecules>Long Answer Type Questions>Q 51

State the law of conservation of mass. Give one example to illustrate this law.

EASY
9th CBSE
IMPORTANT
Science for Ninth class Part 2 Chemistry>Chapter 3 - Atoms and Molecules>Long Answer Type Questions>Q 52
State the law of constant proportions. Give one example to illustrate this law.
MEDIUM
9th CBSE
IMPORTANT
Science for Ninth class Part 2 Chemistry>Chapter 3 - Atoms and Molecules>Long Answer Type Questions>Q 53

State the various postulates of Dalton's atomic theory of matter.

EASY
9th CBSE
IMPORTANT
Science for Ninth class Part 2 Chemistry>Chapter 3 - Atoms and Molecules>Long Answer Type Questions>Q 53
Which postulate of Dalton's atomic theory can explain the law of conservation of mass?
MEDIUM
9th CBSE
IMPORTANT
Science for Ninth class Part 2 Chemistry>Chapter 3 - Atoms and Molecules>Long Answer Type Questions>Q 53
Which postulate of Dalton's atomic theory can explain the law of constant proportion?
EASY
9th CBSE
IMPORTANT
Science for Ninth class Part 2 Chemistry>Chapter 3 - Atoms and Molecules>Long Answer Type Questions>Q 54
What is the significance of the symbol of an element? Explain with the help of an example.
EASY
9th CBSE
IMPORTANT
Science for Ninth class Part 2 Chemistry>Chapter 3 - Atoms and Molecules>Long Answer Type Questions>Q 54
Explain the significance of the symbol H.