Define molar mass.

Important Questions on Atoms and Molecules

EASY

9th CBSE

IMPORTANT

LIVING SCIENCE CHEMISTRY 9>Chapter 3 - Atoms and Molecules>TEST PAPER>Q 1

Define gram-molecular mass.

EASY

9th CBSE

IMPORTANT

LIVING SCIENCE CHEMISTRY 9>Chapter 3 - Atoms and Molecules>TEST PAPER>Q 2

Define valency.

EASY

9th CBSE

IMPORTANT

LIVING SCIENCE CHEMISTRY 9>Chapter 3 - Atoms and Molecules>TEST PAPER>Q 2

Define valence electron.

MEDIUM

9th CBSE

IMPORTANT

LIVING SCIENCE CHEMISTRY 9>Chapter 3 - Atoms and Molecules>TEST PAPER>Q 3

State the postulates of Dalton's atomic theory. Is the theory valid at present? Give reasons. 

EASY

9th CBSE

IMPORTANT

LIVING SCIENCE CHEMISTRY 9>Chapter 3 - Atoms and Molecules>TEST PAPER>Q 4

What is the atomicity of ${\mathrm{PCl}}_5$? 

EASY

9th CBSE

IMPORTANT

LIVING SCIENCE CHEMISTRY 9>Chapter 3 - Atoms and Molecules>TEST PAPER>Q 4

What is the atomicity of ${\mathrm{CH}}_4$?

EASY

9th CBSE

IMPORTANT

LIVING SCIENCE CHEMISTRY 9>Chapter 3 - Atoms and Molecules>TEST PAPER>Q 4

What is the atomicity of ${\mathrm{NCl}}_3$?               

EASY

9th CBSE

IMPORTANT

LIVING SCIENCE CHEMISTRY 9>Chapter 3 - Atoms and Molecules>TEST PAPER>Q 4

What is the atomicity of ${\mathrm{OF}}_2$?