How do we test purity of substance? 

Important Questions on Is Matter Around Us Pure?

MEDIUM

9th CBSE

IMPORTANT

Together with Science Class 9>Chapter 2 - Is Matter Around Us Pure?>ASSESS YOURSELF>Q 20

How can we separate particles of colloidal solution? Name the process. 

MEDIUM

9th CBSE

IMPORTANT

Together with Science Class 9>Chapter 2 - Is Matter Around Us Pure?>ASSESS YOURSELF>Q 21

When blue ink is heated, what do you think has got evaporated from the watch glass? 

MEDIUM

9th CBSE

IMPORTANT

Together with Science Class 9>Chapter 2 - Is Matter Around Us Pure?>ASSESS YOURSELF>Q 22

What will be the residue left on the watch glass on heating blue ink in it? 

EASY

9th CBSE

IMPORTANT

Together with Science Class 9>Chapter 2 - Is Matter Around Us Pure?>ASSESS YOURSELF>Q 23

Is ink a pure substance or mixture? Give reason. 

MEDIUM

9th CBSE

IMPORTANT

Together with Science Class 9>Chapter 2 - Is Matter Around Us Pure?>ASSESS YOURSELF>Q 24

Does blue ink consist of single colour or more than one colour?

EASY

9th CBSE

IMPORTANT

Together with Science Class 9>Chapter 2 - Is Matter Around Us Pure?>ASSESS YOURSELF>Q 25

How is pure sugar obtained from sugar solution? 

EASY

9th CBSE

IMPORTANT

Together with Science Class 9>Chapter 2 - Is Matter Around Us Pure?>ASSESS YOURSELF>Q 26

What do you observe in the china dish during crystallization? 

MEDIUM

9th CBSE

IMPORTANT

Together with Science Class 9>Chapter 2 - Is Matter Around Us Pure?>ASSESS YOURSELF>Q 27

Does the crystals look pure after crystallisation?