Page 1 - 4. HOME ASSIGNMENT- FACTORS AFFECTING STATES OF MATTER

SAI International School
Class-IX
Subject-Chemistry
Topic-Matter in our surroundings
Sub topic- Factors affecting the states of matter
OBJECTIVE QUESTIONS

Q.1 Some crushed ice is put in a test tube and warmed. The ice melts because
its particles
a) change their size
b) gain heat energy and escape
c) gain heat energy and become closer
d) gain heat energy and move away from their fixed positions
Q.2 When ice melts to water, then heat is
a) absorbed
b) evolved
c) no change
d) depends on conditions
Q.3 When heat is constantly applied by a burner to boiling water, then the
temperature of water during vapourisation:
a) rises very slowly
b) rises rapidly until steam is produced
c) first rises then become constant
d) does not rise at all
Q.4 . The temperature remains same during melting, while all the ice changes
into water due to the
a) latent heat of fusion.
b) latent heat of vapourisation.
c) latent heat of evaporation.
d) latent heat of sublimation.
Q.5 The steam causes more severe burns as compared to boiling water at
same temperature due to
a) latent heat of vaporisation.
b) latent heat of fusion.
c) latent heat of sublimation.
latent heat of condensation.
Q.6 The ice is more effective in cooling than ice cold water at same
temperature due to
a) latent heat of vaporisation.
b) latent heat of fusion.
c) latent heat of sublimation.
latent heat of condensation.
Q.7 Latent heat of fusion is amount of

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