EASY
9th CBSE
IMPORTANT
Earn 100

A compound has the chemical formula MnO2 . Answer the following questions:
a. Name the elements present in this compound.
b. Name the compound represented by the formula.
 

Important Questions on Atoms and Molecules

MEDIUM
9th CBSE
IMPORTANT
LIVING SCIENCE CHEMISTRY 9>Chapter 3 - Atoms and Molecules>Practice Questions>Q 5
What is the value of Avogadro's number? What would be the mass of one Avogadro's number of nitrogen atoms? 
 
MEDIUM
9th CBSE
IMPORTANT
LIVING SCIENCE CHEMISTRY 9>Chapter 3 - Atoms and Molecules>Practice Questions>Q 6
What is the mass of carbon that will be present with 8 g of oxygen in CO2? 
MEDIUM
9th CBSE
IMPORTANT
LIVING SCIENCE CHEMISTRY 9>Chapter 3 - Atoms and Molecules>Practice Questions>Q 7
What is the mass of oxygen which will be present with 6 g of carbon in CO2? 
EASY
9th CBSE
IMPORTANT
LIVING SCIENCE CHEMISTRY 9>Chapter 3 - Atoms and Molecules>Practice Questions>Q 8
State law of conservation of mass.
MEDIUM
9th CBSE
IMPORTANT
LIVING SCIENCE CHEMISTRY 9>Chapter 3 - Atoms and Molecules>Practice Questions>Q 8
State law of constant proportions.
MEDIUM
9th CBSE
IMPORTANT
LIVING SCIENCE CHEMISTRY 9>Chapter 3 - Atoms and Molecules>Practice Questions>Q 9
Identify the postulates of Dalton's atomic theory which are no longer supported by the modern knowledge of nature of matter.
EASY
9th CBSE
IMPORTANT
LIVING SCIENCE CHEMISTRY 9>Chapter 3 - Atoms and Molecules>Practice Questions>Q 10
What is the atomicity of AsH3?
MEDIUM
9th CBSE
IMPORTANT
LIVING SCIENCE CHEMISTRY 9>Chapter 3 - Atoms and Molecules>Practice Questions>Q 10
What is the atomicity of CO?