MEDIUM
9th CBSE
IMPORTANT
Earn 100

What is the difference between 2H and H2 ?

Important Questions on Atoms and Molecules

MEDIUM
9th CBSE
IMPORTANT

What is the difference between 2N and N2 ?

HARD
9th CBSE
IMPORTANT

State the Law of conservation of mass. If 12 gm of carbon is burnt in the presence of 32 gm of oxygen, how much carbon dioxide will be formed?

HARD
9th CBSE
IMPORTANT

What are the postulates of Dalton's atomic theory ? What are the drawbacks of this theory or how has this theory been modified ?

HARD
9th CBSE
IMPORTANT
State and explain the law of conservation of mass. How does Dalton's atomic theory explain this law ?
HARD
9th CBSE
IMPORTANT

State and explain law of constant proportion. How does Dalton's atomic theory explain this law ?

EASY
9th CBSE
IMPORTANT

State and explain the term atom.

EASY
9th CBSE
IMPORTANT

State and explain the term molecule.

EASY
9th CBSE
IMPORTANT

State and explain the term atomic mass.