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WorksheetsRevision matter & measurements
Total questions: 25
Worksheet time: 14mins
What happens to molecules when the temperature drops or lowers?
The molecules get closer together
The molecules start moving faster.
The molecules stop moving.
The molecules become smaller.
Change of state of matter happens only when
heat is absorbed
heat is rejected
heat is absorbed or rejected
temperature is constant
The reverse process of fusion
melting
fission
freezing
condensation
vaporisation is the process of
heating liquid at a fixed temperature
change of liquid to gas when heated
boiling point
evaporation
Melting point of ice is same as
melting point of water
freezing point of ice
freezing point of water
boiling point of ice
Amount of heat rejected during freezing of a substance is same as
heat absorbed during melting
heat rejected during melting
heat absorbed during freezing
heat rejected during freezing
The change of liquid state to gaseous state on heating at a constant temperature by absorption of heat is called
evaporation
condensation
boiling point
vaporization
It is diificult to cook vegetables at low pressure, but easy to cook in a pressure cooker. the reason is
boiling point of liquid increases with increase in pressure
temperature is low at low pressure
pressure cooker is closed
boiling point of liquid increases with decrease in pressure
The process of change of liquid state to gaseous state at all temperautres is called
vaporization
evaporation
condensation
sublimation
Evaporation of a liquid does not depend on
temperature of liquid
exposed surface area
volume of liquid
humidity
Sweat cools your body because
sweat takes heat from the body to evaporate
water in the sweat cools the body
water in the sweat lowers the body temperature
excess water is removed from the body
Carbondioxide gas when cooled converts into solid carbondioxide which is called dry ice. this process is called
sublimation
deposition
evaporation
vaporization
What is the density of a piece of copper whose mass is 17.8 g and has a volume is 2 cm3 ?
8.9 g m-3
8.9 g cm-3
8.9 kg m-3
8.9 kg cm-3
At what temperature is the density of water , 1000 kgm-3 ?
4° K
4° C
0° C
100° C
Weight of the liquid displaced by a body is equal to
apparent weight
lost weight
Buoyant force
relative density
Ratio of density of a substance to the density of water.
density
realtive density
upthrust
unit of density
If the density of a body is more than the density of liquid
the body sinks
the body floats
the body neither sink nor float
the body partialy sinks
Apparent weight of a floating body
0
1
2
3
1 g cm-3 = _________kg m-3
1 / 1000
106
1000
10-3
