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

MEDIUM
9th CBSE
IMPORTANT
Science for Ninth class Part 2 Chemistry>Chapter 2 - Is Matter Around Us Pure>Very Short Answer Type Questions>Q 16
“The properties of the product are different from those of the constituents”. Identify whether this statement best describes an element, a compound or a mixture.
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 90
The given mixture contains three constituents A, B and C. The constituent A is a yellow coloured, solid element which dissolves in a liquid D. The constituent B is a blue coloured salt which is insoluble in liquid D but dissolves easily in another liquid E. The constituent C is a liquid which is used in cooking food and forms a solid fat on hydrogenation. 
(a) What do you think could (i) constituent A, and (ii) liquid D be? 
(b) What could (i) constituent B, and (ii) liquid E be? 
(c) What could liquid C be? 
(d) How will you separate the mixture containing A, B and C?