Matter in our Surroundings | In-Chapter Exercise Solutions| NCERT Class 09 Ch. 1| Page 3, 6, 9, 10

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NCERT In-Chapter Exercise Solutions – Matter in Our Surroundings (Page 3, 6, 9 and 10)

Page 03 Q 01 - 00:08 - 04:10
Page 03 Q 02 - 04:11 - 05:54
Page 03 Q 03 - 05:55 - 07:15
Page 03 Q 04 - 07:16 - 08:18
Page 06 Q 01 - 08:19 - 11:21
Page 06 Q 02 - 11:22 - 17:10
Page 06 Q 03 - 17:11 - 20:46
Page 06 Q 04 - 20:47 - 22:47
Page 09 Q 01 - 22:48 - 24:20
Page 09 Q 02 - 24:21 - 27:06
Page 09 Q 03 - 27:07 - 29:02
Page 09 Q 04 - 29:03 - 29:51
Page 10 Q 01 - 29:52 - 32:53
Page 10 Q 02 - 32:54 - 34:07
Page 10 Q 03 - 34:08 - 34:55
Page 10 Q 04 - 34:56 - 37:04
Page 10 Q 05 - 37:05 - 38:39

Page 3
1. Which of the following are matter? Chair, air, love, smell, hate, almonds, thought, cold, colddrink, smell of perfume.

2. Give reasons for the following observation:
The smell of hot sizzling food reaches you several metres
away, but to get the smell from cold food you have to go close.

3. A diver is able to cut through water in a swimming pool. Which
property of matter does this observation show?

4. What are the characteristics of the particles of matter?

Page 6
1. The mass per unit volume of a substance is called density.
(density = mass/volume).
Arrange the following in order of increasing density – air, exhaust
from chimneys, honey, water, chalk, cotton and iron.

2. (a) Tabulate the differences in the characteristics of states of matter.
(b) Comment upon the following: rigidity, compressibility, fluidity, filling a gas container, shape, kinetic energy and density.

3. Give reasons
(a) A gas fills completely the vessel in which it is kept.
(b) A gas exerts pressure on the walls of the container.
(c) A wooden table should be called a solid.
(d) We can easily move our hand in air but to do the same
through a solid block of wood we need a karate expert.

4. Liquids generally have lower density as compared to solids. But you must have observed that ice floats on water. Find out why.

Page 9
1. Convert the following temperature to celsius scale:
a. 300 K b. 573 K.

2. What is the physical state of water at: a. 250ºC b. 100ºC ?

3. For any substance, why does the temperature remain constant
during the change of state?

4. Suggest a method to liquefy atmospheric gases.

Page 10
1. Why does a desert cooler cool better on a hot dry day?

2. How does the water kept in an earthen pot (matka) become cool
during summer?

3. Why does our palm feel cold when we put some acetone or
petrol or perfume on it?

4. Why are we able to sip hot tea or milk faster from a saucer rather than a cup?

5. What type of clothes should we wear in summer?

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MATTER in Our Surroundings : CBSE Class 9 IX Science, NCERT Solutions Class 9 Science Chapter 1 - Matter in our Surroundings, Chemistry Matter in Surroundings part 1 (Introduction, Matter & Particles) CBSE class 9 IX, CBSE Class 9 Science - Chapter 1 - Matter in Our Surroundings,

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