MEDIUM
9th CBSE
IMPORTANT
Earn 100

Identify the solution from the following mixtures:
(a) air
(b) muddy water
(c) sea water
(d) soda water

Important Questions on Is Matter Around Us Pure?

MEDIUM
9th CBSE
IMPORTANT
Core science chemistry>Chapter 2 - Is Matter Around Us Pure?>EXERCISE 2A>Q 5
The 'sea water' can be classified as a homogeneous as well as heterogeneous mixture. Comment.
EASY
9th CBSE
IMPORTANT
Core science chemistry>Chapter 2 - Is Matter Around Us Pure?>EXERCISE 2A>Q 6
Sucrose (sugar) crystals obtained from sugarcane and beetroot are mixed together. Will it be a pure substance or a mixture? Give reasons for the same.
EASY
9th CBSE
IMPORTANT
Core science chemistry>Chapter 2 - Is Matter Around Us Pure?>EXERCISE 2A>Q 1
State points of difference between homogeneous and heterogeneous mixtures.
MEDIUM
9th CBSE
IMPORTANT
Core science chemistry>Chapter 2 - Is Matter Around Us Pure?>EXERCISE 2A>Q 2
Given a solution of substance A, how will you test whether it is saturated or unsaturated with respect to A, at the prevailing temperature? What is observed when a hot saturated solution of a substance is allowed to cool?
EASY
9th CBSE
IMPORTANT
Core science chemistry>Chapter 2 - Is Matter Around Us Pure?>EXERCISE 2A>Q 3
State two characteristics of pure substance.
MEDIUM
9th CBSE
IMPORTANT
Core science chemistry>Chapter 2 - Is Matter Around Us Pure?>EXERCISE 2A>Q 4

Classify the following as homogeneous and heterogeneous mixture:
(a) Soft drink 
(b) Wood 
(c) Vinegar 
(d) Soil 
(e) Sugar solution 
(f) Filtered tea

HARD
9th CBSE
IMPORTANT
Core science chemistry>Chapter 2 - Is Matter Around Us Pure?>EXERCISE 2A>Q 5

The teacher instructed three students ‘A’, ‘B’ and ‘C’ respectively to prepare a 50% (mass by volume) solution of sodium hydroxide (NaOH). 'A' dissolved 50g of NaOH in 100 mL of water, 'B' dissolved 50g of NaOH in 100 g of water while 'C dissolved 50g of NaOH in water to make 100 mL of solution. Which one of them has made the desired solution and why?

MEDIUM
9th CBSE
IMPORTANT
Core science chemistry>Chapter 2 - Is Matter Around Us Pure?>EXERCISE 2A>Q 6
Arun has prepared 0.01% (by mass) solution of sodium chloride in water. Which of the following correctly represents the composition of the solutions?