MEDIUM
9th CBSE
IMPORTANT
Earn 100

Draw a flow diagram of the processes involved in obtaining gases like nitrogen, oxygen and argon from air.

Important Questions on Is Matter Around Us Pure

EASY
9th CBSE
IMPORTANT
Science for Ninth class Part 2 Chemistry>Chapter 2 - Is Matter Around Us Pure>Multiple Choice Questions (MCQs)>Q 74
The dyes present in fountain pen ink can be separated by the technique of : 
EASY
9th CBSE
IMPORTANT
Science for Ninth class Part 2 Chemistry>Chapter 2 - Is Matter Around Us Pure>Multiple Choice Questions (MCQs)>Q 76
The material which is added to water during the purification process at the waterworks to disinfect it is:
MEDIUM
9th CBSE
IMPORTANT
Science for Ninth class Part 2 Chemistry>Chapter 2 - Is Matter Around Us Pure>Multiple Choice Questions (MCQs)>Q 77
The technique which is used to separate particles of a solid suspended in a liquid quickly is called: 
EASY
9th CBSE
IMPORTANT
Science for Ninth class Part 2 Chemistry>Chapter 2 - Is Matter Around Us Pure>Multiple Choice Questions (MCQs)>Q 80

The correct increasing order of the boiling points of liquid oxygen, liquid argon and liquid nitrogen present in liquid air is:

EASY
9th CBSE
IMPORTANT
Science for Ninth class Part 2 Chemistry>Chapter 2 - Is Matter Around Us Pure>Multiple Choice Questions (MCQs)>Q 85
Which one of the following scrap metal cannot be separated by magnetic separation ?
HARD
9th CBSE
IMPORTANT
Science for Ninth class Part 2 Chemistry>Chapter 2 - Is Matter Around Us Pure>Questions Based on High Order Thinking Skills (HOTS)>Q 86
The liquid air has three components X, Y and Z whose boiling points are -186°C, -183°C and -196°C respectively. When liquid air is fed into a tall fractional distillation column from near its bottom and warmed up slowly : 
(a) Which component will be collected from near the bottom of the fractional distillation column? Why? 
(b) Which component will be collected from the top part of the fractional distillation column? Why? 
(c) Which component will be collected from the middle part of the fractional distillation column? Why? 
(d) What could the component X, Y and Z be? 
HARD
9th CBSE
IMPORTANT
Science for Ninth class Part 2 Chemistry>Chapter 2 - Is Matter Around Us Pure>Questions Based on High Order Thinking Skills (HOTS)>Q 87
There are three liquids A, B & C, all having different densities and different boiling points. Liquids A & C are organic in nature whereas liquid B is considered to be inorganic. When liquids A & B are put together in a container, they form a single layer. On the other hand, when, liquids B & C are mixed, they form two separate layers :
(a) Which process will you use to separate a mixture of A & B ? 
(b) Which method will you use to separate a mixture of B & C ? 
(c) Name the liquids which would behave like (i) A (ii) B and (iil)C. 
HARD
9th CBSE
IMPORTANT
Science for Ninth class Part 2 Chemistry>Chapter 2 - Is Matter Around Us Pure>Questions Based on High Order Thinking Skills (HOTS)>Q 88
A solid mixture contains four constituents P, Q, R & S. P consists of tiny grains and it is mixed with cement for plastering the walls. Q is a white solid which is recovered on a large scale from sea water by the process of evaporation. R is in the form of tiny particles of a material whose corrosion is called rusting. And S is a white solid which is used in making ordinary dry cells. 
(a) What could P, Q, R & S be? 
(b) How would you separate a mixture containing P, Q, R & S?