Modern's abc+ of SCIENCE CHEMISTRY FOR Class IX>Chapter 3 - Atoms and Molecules>Revision Exercise>Q 7

MEDIUM

9th CBSE

IMPORTANT

Earn 100

Write the name of the following compound: (Calcium chloride / Calcium chlorate)
${CaCl}_{2}$

92.42% studentsanswered this correctly

Important Questions on Atoms and Molecules

HARD

9th CBSE

IMPORTANT

Modern's abc+ of SCIENCE CHEMISTRY FOR Class IX>Chapter 3 - Atoms and Molecules>Revision Exercise>Q 8

Arrange the following in the increasing order of their mass:
(i) One atom of silver.
(ii) One mole atom of

N

.
(iii)

2

g of sodium.
(iv)

6.022 x 10^{22}

atoms of calcium.

HARD

9th CBSE

IMPORTANT

Modern's abc+ of SCIENCE CHEMISTRY FOR Class IX>Chapter 3 - Atoms and Molecules>Revision Exercise>Q 9

The formula of a compound of radium bromide is

{RaBr}_{2}

. Identify the chemical formula of radium carbonate.

$A : {RaCl}_{2} B : {RaCO}_{3} C : {RaSO}_{4}$

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

MEDIUM

9th CBSE

IMPORTANT

Modern's abc+ of SCIENCE CHEMISTRY FOR Class IX>Chapter 3 - Atoms and Molecules>Revision Exercise>Q 9

The formula of a compound of radium bromide is

{RaBr}_{2}

.
Identify the formula of radium sulphate.

$A : {RaCl}_{2} B : {RaCO}_{3} C : {RaSO}_{4}$

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

MEDIUM

9th CBSE

IMPORTANT

Modern's abc+ of SCIENCE CHEMISTRY FOR Class IX>Chapter 3 - Atoms and Molecules>Revision Exercise>Q 10

Two elements sometimes form more than one compounds.

MEDIUM

9th CBSE

IMPORTANT

Modern's abc+ of SCIENCE CHEMISTRY FOR Class IX>Chapter 3 - Atoms and Molecules>Revision Exercise>Q 10

The smallest particle of a compound is element.

EASY

9th CBSE

IMPORTANT

Modern's abc+ of SCIENCE CHEMISTRY FOR Class IX>Chapter 3 - Atoms and Molecules>Revision Exercise>Q 10

Mass of

6.022

atoms of an element is called atomic mass.

MEDIUM

9th CBSE

IMPORTANT

Modern's abc+ of SCIENCE CHEMISTRY FOR Class IX>Chapter 3 - Atoms and Molecules>Revision Exercise>Q 10

One mole of every substance has same mass.

EASY

9th CBSE

IMPORTANT

Modern's abc+ of SCIENCE CHEMISTRY FOR Class IX>Chapter 3 - Atoms and Molecules>Revision Exercise>Q 11

_____ is a pure substance which is made up of only one kind of atoms.