EASY
9th CBSE
IMPORTANT
Earn 100

Define the term mole. Write the notation of the mole unit. 

Important Questions on Atoms and Molecules

MEDIUM
9th CBSE
IMPORTANT
LIVING SCIENCE CHEMISTRY 9>Chapter 3 - Atoms and Molecules>Practice Questions>Q 12
How many gram-atoms of carbon and oxygen are present in one mole of carbon dioxide?
MEDIUM
9th CBSE
IMPORTANT
LIVING SCIENCE CHEMISTRY 9>Chapter 3 - Atoms and Molecules>Practice Questions>Q 13
Write the relationship between the number of moles (n), mass (m) and the molar mass (M) of a compound.
MEDIUM
9th CBSE
IMPORTANT
LIVING SCIENCE CHEMISTRY 9>Chapter 3 - Atoms and Molecules>Practice Questions>Q 14
Define the term symbol of an element. Why are Dalton's symbols not used in chemistry?
MEDIUM
9th CBSE
IMPORTANT
LIVING SCIENCE CHEMISTRY 9>Chapter 3 - Atoms and Molecules>Practice Questions>Q 15
Write the chemical formula of Hydrogen sulphide.
MEDIUM
9th CBSE
IMPORTANT
LIVING SCIENCE CHEMISTRY 9>Chapter 3 - Atoms and Molecules>Practice Questions>Q 15
Write the chemical formula of Iron (ll) Chloride. 
EASY
9th CBSE
IMPORTANT
LIVING SCIENCE CHEMISTRY 9>Chapter 3 - Atoms and Molecules>Practice Questions>Q 16
What are polyatomic ions? Give examples.
MEDIUM
9th CBSE
IMPORTANT
LIVING SCIENCE CHEMISTRY 9>Chapter 3 - Atoms and Molecules>Practice Questions>Q 17
What is the molecule C60 called? What type of shape does it have?
MEDIUM
9th CBSE
IMPORTANT
LIVING SCIENCE CHEMISTRY 9>Chapter 3 - Atoms and Molecules>Practice Questions>Q 1
What do you understand by the law of constant proportions? Illustrate it with two examples.