Page 2 - HOME ASSIGNMENT-1(Obj.& Sub.)
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(iii) freezing
(iv) melting
a) Only (i)
b) Only (iv)
c) (i) and (iii)
d) (ii) and (iv)
Q.8 Dry ice is
a) Solid CO2
b) Water in solid state
c) Non-volatile solid
d) Liquid carbon dioxide
Q.9 If we keep cold drink bottle in freezer, what will happen?
a) Water will change into ice
b) Cold drink bottle will break
c) CO2 gas will get solidified
d) Nothing happens
Q.10 If we keep cold drink bottle in freezer, what will happen?
a) Water will change into ice
b) Cold drink bottle will break
c) CO2 gas will get solidified
d) Nothing happens
SUBJECTIVE
Q.1 Name one property which is shown by Ammonium chloride not by Sodium
chloride
Q.2 What is deposition? Name a substance which undergo sublimation.
Q.3 Define the following:
a) Sublimation
b) Melting point
c) Vaporisation (c) Vapourasition: The conversion of a liquid into its
gaseous form on heating is known as vapourisation.
Q.4 Give reasons:
a) A piece of naphthalene ball kept inside clothes disappear after few
days.
b) Gases get converted into liquid on cooling.
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