MEDIUM
9th CBSE
IMPORTANT
Earn 100

Define foam and give one example:

 

Important Questions on Is Matter Around Us Pure

MEDIUM
9th CBSE
IMPORTANT
Science for Ninth class Part 2 Chemistry>Chapter 2 - Is Matter Around Us Pure>Short Answer Type Questions>Q 35
What is meant by the concentration of a solution?
MEDIUM
9th CBSE
IMPORTANT
Science for Ninth class Part 2 Chemistry>Chapter 2 - Is Matter Around Us Pure>Short Answer Type Questions>Q 36
What will happen if a saturated solution is: (i) heated and (ii) cooled?
HARD
9th CBSE
IMPORTANT
Science for Ninth class Part 2 Chemistry>Chapter 2 - Is Matter Around Us Pure>Short Answer Type Questions>Q 37
21.5 g of sodium chloride dissolves in 60 g of water at 25°C. Calculate the solubility of sodium chloride in water at that temperature.
HARD
9th CBSE
IMPORTANT
Science for Ninth class Part 2 Chemistry>Chapter 2 - Is Matter Around Us Pure>Short Answer Type Questions>Q 38
9.72 g of potassium chloride dissolves in 30 g of water at 70°C. Calculate the solubility of potassium chloride at that temperature.
EASY
9th CBSE
IMPORTANT
Science for Ninth class Part 2 Chemistry>Chapter 2 - Is Matter Around Us Pure>Short Answer Type Questions>Q 39
Classify the following as physical or chemical change:
Cooking of food.
MEDIUM
9th CBSE
IMPORTANT
Science for Ninth class Part 2 Chemistry>Chapter 2 - Is Matter Around Us Pure>Short Answer Type Questions>Q 39

Classify the following as physical or chemical change:

Boiling of water.

MEDIUM
9th CBSE
IMPORTANT
Science for Ninth class Part 2 Chemistry>Chapter 2 - Is Matter Around Us Pure>Short Answer Type Questions>Q 39

Classify the following as physical or chemical change:

Cutting of trees.

MEDIUM
9th CBSE
IMPORTANT
Science for Ninth class Part 2 Chemistry>Chapter 2 - Is Matter Around Us Pure>Short Answer Type Questions>Q 39

Classify the following as physical or chemical change:

Dissolving salt in water.