CHEMISTRY SAII CBSE CLASS IX Online Test

No of moles in 112 g of calcium oxide is

Formula of calcium oxide is

An atom contains 12 nucleons and 6 electrons. Its mass number is

Which atom is it?

Considering an atom has 5 shells, the number of electrons that can be accomodated in it are

Ratio by mass of carbon and oxygen in Carbon dioxide are

alpha

particles were

Description:

This test is for al;l cbse students of class IX students interested to get top marks in chemistry. The chapters for the test are atoms and molecules and structure of an atom. Students must be thorough with valencies, theory and numericals of mole concept, isotopes etc.
Hope you all get good marks. BEST OF LUCK!

Tags:

Atoms and molecules Structure of an atom CBSE Chemistry

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