Together with Science Class 9>Chapter 3 - Atoms and Molecules>ASSESS YOURSELF>Q 9

MEDIUM

9th CBSE

IMPORTANT

Earn 100

An element 'X' has valency equal to $3$ . What will be its formula with carbonate ion?

75.47% studentsanswered this correctly

Important Questions on Atoms and Molecules

MEDIUM

9th CBSE

IMPORTANT

Together with Science Class 9>Chapter 3 - Atoms and Molecules>ASSESS YOURSELF>Q 10

The mass of single atom of an element X is

2.65 \times 10^{- 23}

g. The atomic mass and name of element is

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9th CBSE

IMPORTANT

Together with Science Class 9>Chapter 3 - Atoms and Molecules>ASSESS YOURSELF>Q 11

'X' and 'Y' are two elements which form X₂Y₃and X₃Y₄. If

0.2

mol of X₂Y₃weighs

32

g and

0.4

mol of X₃Y₄ weighs

92.8

g, the atomic weights of X and Y respectively are

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9th CBSE

IMPORTANT

Together with Science Class 9>Chapter 3 - Atoms and Molecules>ASSESS YOURSELF>Q 12

4

g of

{CH}_{4}

and

8

g of

O_{2}

contain

EASY

9th CBSE

IMPORTANT

Together with Science Class 9>Chapter 3 - Atoms and Molecules>ASSESS YOURSELF>Q 13

Which of the following is octa-atomic?

HARD

9th CBSE

IMPORTANT

Together with Science Class 9>Chapter 3 - Atoms and Molecules>ASSESS YOURSELF>Q 14

Mass of one atom of oxygen is

MEDIUM

9th CBSE

IMPORTANT

Together with Science Class 9>Chapter 3 - Atoms and Molecules>ASSESS YOURSELF>Q 15

3.42

g of sucrose are dissolved in

18

g of water in a beaker. The number of oxygen atoms in the solution are

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9th CBSE

IMPORTANT

Together with Science Class 9>Chapter 3 - Atoms and Molecules>ASSESS YOURSELF>Q 16

A change in the physical state can be brought about

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9th CBSE

IMPORTANT

Together with Science Class 9>Chapter 3 - Atoms and Molecules>ASSESS YOURSELF>Q 18

Matter can neither be created nor be destroyed is law of conservation of _____.