EASY
9th CBSE
IMPORTANT
Earn 100

Give one example each of polyatomic cation and polyatomic anion.

Important Questions on Atoms and Molecules

MEDIUM
9th CBSE
IMPORTANT
Super Simplified Science Chemistry CLASS IX>Chapter 3 - Atoms and Molecules>Test Your Knowledge>Q 13

Define the term mole.

EASY
9th CBSE
IMPORTANT
Super Simplified Science Chemistry CLASS IX>Chapter 3 - Atoms and Molecules>Test Your Knowledge>Q 14
What do the following denote (i) N  (ii) N2?
EASY
9th CBSE
IMPORTANT
Super Simplified Science Chemistry CLASS IX>Chapter 3 - Atoms and Molecules>Test Your Knowledge>Q 15
Write the chemical formulae of (i) sodium carbonate (ii) calcium sulphate.
EASY
9th CBSE
IMPORTANT
Super Simplified Science Chemistry CLASS IX>Chapter 3 - Atoms and Molecules>Test Your Knowledge>Q 16
Explain gram atomic mass in terms of mole concept.
MEDIUM
9th CBSE
IMPORTANT
Super Simplified Science Chemistry CLASS IX>Chapter 3 - Atoms and Molecules>Test Your Knowledge>Q 17

Why do mixtures not obey the law of constant composition?

EASY
9th CBSE
IMPORTANT
Super Simplified Science Chemistry CLASS IX>Chapter 3 - Atoms and Molecules>Test Your Knowledge>Q 18

What do we call the particles which have less electrons than the normal atoms?

EASY
9th CBSE
IMPORTANT
Super Simplified Science Chemistry CLASS IX>Chapter 3 - Atoms and Molecules>Test Your Knowledge>Q 19

What is the valency of PO4 in the compound Ca3(PO4)2?

EASY
9th CBSE
IMPORTANT
Super Simplified Science Chemistry CLASS IX>Chapter 3 - Atoms and Molecules>Test Your Knowledge>Q 20
Calculate the molar mass of sulphuric acid (H2SO4).