Draw a labelled diagram showing the process of fractional distillation.

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 1

Which of the following is true about

FeS

?

MEDIUM

9th CBSE

IMPORTANT

Together with Science Class 9>Chapter 2 - Is Matter Around Us Pure?>ASSESS YOURSELF>Q 4

For each of the following, use letters to indicate whether the matter is element (E), compound (C) or mixture (M).

S. No.	Matter	Classification
$1$ .	Water
$2$ .	Mercury
$3$ .	Air
$4$ .	Tin

EASY

9th CBSE

IMPORTANT

Together with Science Class 9>Chapter 2 - Is Matter Around Us Pure?>ASSESS YOURSELF>Q 6

Which of the following statements are true for pure substances?
(i) Pure substances contain only one kind of particles.
(ii) Pure substances may be compounds or mixtures.
(iii) Pure substances have the same composition throughout.
(iv) Pure substances can be exemplified by all elements other than nickel.

EASY

9th CBSE

IMPORTANT

Together with Science Class 9>Chapter 2 - Is Matter Around Us Pure?>ASSESS YOURSELF>Q 7

Rusting of an article made up of iron is called

HARD

9th CBSE

IMPORTANT

Together with Science Class 9>Chapter 2 - Is Matter Around Us Pure?>ASSESS YOURSELF>Q 50

Calculate the mass of potassium sulphate required to prepare its 10% solution in 100 g of water.

MEDIUM

9th CBSE

IMPORTANT

Together with Science Class 9>Chapter 2 - Is Matter Around Us Pure?>ASSESS YOURSELF>Q 50

Differentiate between physical and chemical change. Give one example of each. Give one example where both physical and chemical change is taking place.

HARD

9th CBSE

IMPORTANT

Together with Science Class 9>Chapter 2 - Is Matter Around Us Pure?>ASSESS YOURSELF>Q 51

What volume of ethyl alcohol and water must be mixed together to prepare