Secondary Chemistry>Chapter 3 - Atoms and Molecules>Questions as per the Guidelines of CBSE>Q 5

MEDIUM

9th CBSE

IMPORTANT

Earn 100

Which one has more mass $1$ mole of hydrogen gas or $0.20$ mole of nitrogen gas?

Important Questions on Atoms and Molecules

EASY

9th CBSE

IMPORTANT

Secondary Chemistry>Chapter 3 - Atoms and Molecules>Questions as per the Guidelines of CBSE>Q 6

Which one has the larger number of molecules-

1

mole of

N_{2}

or

1

mole of

O_{2}

?

EASY

9th CBSE

IMPORTANT

Secondary Chemistry>Chapter 3 - Atoms and Molecules>Questions as per the Guidelines of CBSE>Q 7

What is the value of Avogadro constant?(

A : 6.022 \times 10^{26}, B : 6.022 \times 10^{23} or C : 6.022 \times 10^{14} .

)

(Enter your correct answer as $A, B or C$ )

EASY

9th CBSE

IMPORTANT

Secondary Chemistry>Chapter 3 - Atoms and Molecules>Questions as per the Guidelines of CBSE>Q 8

What is the valency of carbon in (a)

{CCl}_{4}

, and (b)

{CO}_{2}

?

EASY

9th CBSE

IMPORTANT

Secondary Chemistry>Chapter 3 - Atoms and Molecules>Questions as per the Guidelines of CBSE>Q 9

If the atomic symbol of cobalt is

Co

, what is the atomic symbol of copper?

EASY

9th CBSE

IMPORTANT

Secondary Chemistry>Chapter 3 - Atoms and Molecules>Questions as per the Guidelines of CBSE>Q 10

What is the number of moles in

18

g of water? (

0.5 mole / 1 mole / 1.5 mole

)

EASY

9th CBSE

IMPORTANT

Secondary Chemistry>Chapter 3 - Atoms and Molecules>Questions as per the Guidelines of CBSE>Q 11

What is the mass of 1 mole of water?

EASY

9th CBSE

IMPORTANT

Secondary Chemistry>Chapter 3 - Atoms and Molecules>Questions as per the Guidelines of CBSE>Q 1

State the law of constant proportions and name the scientist who proposed this law.

EASY

9th CBSE

IMPORTANT

Secondary Chemistry>Chapter 3 - Atoms and Molecules>Questions as per the Guidelines of CBSE>Q 2

Name the two laws of chemical combinations and write the statement of one of them.