Page 1 - 4. HOME ASSIGNMENT- DIFFERENT STATES OF MATTER
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SAI International School
                                                       Class-IX
                                                Subject-Chemistry
                                      Topic-Matter in our surroundings
                                     Sub topic- Different states of matter
                OBJECTIVE QUESTIONS
                 Q.1     Assertion: Liquids diffuse less easily as compared to gases.

                         Reason: Intermolecular forces are greater in gases.


                 Q.2     Assertion: Gases have high kinetic energy.
                         Reason : Gases can flow
                 Q.3     Assertion: Gases are highly compressible
                         Reason :The intermolecular space in gases is very high.
                 Q.4     The property to flow is unique to fluids. Which one of the following
                         statements is correct?

                         (a) Only gases behave like fluids
                         (b) Gases and solids behave like fluids

                         (c) Gases and liquids behave like fluids
                         (d) Only liquids are fluids
                 Q.5     A few substances are arranged in the increasing order of ‘forces of

                         attraction’ between their particles. Which one of the following represents a
                         correct arrangement?

                         (a) Water, air, wind
                         (b) Air, sugar, oil

                         (c) Oxygen, water, sugar
                         (d) Salt, juice, air




               SUBJECTIVE
                 Q.1     Why do gases neither have fixed volume nor fixed shape?

                 Q.2     Solids cannot be compressed Justify?
                 Q.3     Give reasons:
                             a)  Gases completely fill the vessel in which they are kept.
                             b)   Solids do not flow.
                 Q.4      A rubber band can change its shape on stretching. Will you classify it as
                          solid or not? Justify?
                 Q.5     A student placed a gas jar containing air in the upside-down position over
                         a gas jar full of reddish brown bromine vapours. He observed that the





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