EASY
9th CBSE
IMPORTANT
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Coal is an element.

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Important Questions on Is Matter Around Us Pure?

EASY
9th CBSE
IMPORTANT
LIVING SCIENCE CHEMISTRY 9>Chapter 2 - Is Matter Around Us Pure?>CHECK YOUR PROGRESS>Q 10
Benzene is a compound and it contains carbon and hydrogen.
EASY
9th CBSE
IMPORTANT
LIVING SCIENCE CHEMISTRY 9>Chapter 2 - Is Matter Around Us Pure?>CHECK YOUR PROGRESS>Q 10
Brass is a mixture of two elements copper and tin.
HARD
9th CBSE
IMPORTANT
LIVING SCIENCE CHEMISTRY 9>Chapter 2 - Is Matter Around Us Pure?>CHECK YOUR PROGRESS>Q 10

Hydrogen is the most abundant element in the earth’s crust.

EASY
9th CBSE
IMPORTANT
LIVING SCIENCE CHEMISTRY 9>Chapter 2 - Is Matter Around Us Pure?>CHECK YOUR PROGRESS>Q 10

A solution of glucose in water is a homogeneous mixture.

HARD
9th CBSE
IMPORTANT
LIVING SCIENCE CHEMISTRY 9>Chapter 2 - Is Matter Around Us Pure?>CHECK YOUR PROGRESS>Q 1
A solution of hydrochloric acid is labeled as 60% (m/v). The density of the solution is 1.1 g ml-1. Calculate the concentration of the solution in % (m/m). 
MEDIUM
9th CBSE
IMPORTANT
LIVING SCIENCE CHEMISTRY 9>Chapter 2 - Is Matter Around Us Pure?>CHECK YOUR PROGRESS>Q 2
A solution of potassium chloride in water is 35% (m/v). The density of the solution is 1.2 g mL-1. Calculate the concentration of the solution in % (m/m).
EASY
9th CBSE
IMPORTANT
LIVING SCIENCE CHEMISTRY 9>Chapter 2 - Is Matter Around Us Pure?>CHECK YOUR PROGRESS>Q 3
The concentration of all salts present in sea water is 3.52% (m/v). Calculate the volume of sea water which on evaporation will produce 5 kg of salts. 
HARD
9th CBSE
IMPORTANT
LIVING SCIENCE CHEMISTRY 9>Chapter 2 - Is Matter Around Us Pure?>CHECK YOUR PROGRESS>Q 4
18-carat gold contains 18 parts of gold and 6 parts of copper by mass. Calculate the concentration of gold and copper in 18-carat gold in % (rn/m).