Class IX, Matter in Our Surroundings | NCERT Science (Chemistry) - CBSE Guide with Notes


Matter in Our Surroundings

CBSE Board Class IX, NCERT Science (Chemistry)

CBSE Guide - Important Points (Definitions) and Hot Questions with Solutions

Question.1: Give reasons for the following observation:
The smell of hot sizzling food reaches you several meters away, but to get the smell from cold food you have to go close.  
Question.2: A diver is able to cut through water in swimming pool. Which property of matter does this observation show?
Question.3: What are characteristics of particles of matter?
Question.4: Why are gases compressible not liquids?
Question.5: 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 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.
Question.6: Liquids generally have lower density as compared to solids. But you must have observed that ice floats on water. Find out why?
Question.7: Differentiate between the properties of three states of matter.
Question.8: For any substance, why does temperature remain constant during the change of state?
Question.9: Suggest a method to liquefy atmospheric gases.
Question.10: Why does a desert cooler cool better on a hot dry day?
Question.11: How does the water kept in an earthen pot (matka) become cool during summer?
Question.12: Why does our palm feel cold when we put some acetone or petrol or perfume on it?
Question.13: Why are we able to sip hot tea or milk faster from a saucer rather than a cup?
Question.14: What type of clothes should we wear in summer?
Question.15: What is meant by saying that the latent heat of vaporization of water is 22.5 x 105 J/Kg?
Question.14: What is meant by saying that the latent heat of fusion of ice is 3.34 x 105 J/Kg?
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CBSE Class IX, NCERT Science (Chemistry) - Matter in Our Surroundings - Also Study
·        Matter in Our Surroundings - MCQs | CBSE Class 9, NCERT Science (Chemistry) Multiple Choice Questions [READ]

·        CBSE Class 9, Matter in Our Surroundings - Answers of NCERT Science Chapter 1 Exercise Questions [READ]

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