EASY
9th CBSE
IMPORTANT
Earn 100

Define molar mass.

Important Questions on Atoms and Molecules

EASY
9th CBSE
IMPORTANT
Define gram-molecular mass.
EASY
9th CBSE
IMPORTANT
Define valence electron.
MEDIUM
9th CBSE
IMPORTANT
State the postulates of Dalton's atomic theory. Is the theory valid at present? Give reasons. 
EASY
9th CBSE
IMPORTANT
What is the atomicity of PCl5
EASY
9th CBSE
IMPORTANT
What is the atomicity of CH4?
EASY
9th CBSE
IMPORTANT
What is the atomicity of NCl3?               
EASY
9th CBSE
IMPORTANT
What is the atomicity of OF2?