GENERAL SCIENCE PHYSICS ONE LINERS FOR TNPSC UPSC SSC SET 013
121). In cold countries alcohol is preferred to mercury as a thermometric liquid because
A). alcohol is a better conductor of heat
B). alcohol can be coloured and its level is seen easily
C). alcohol has a very low freezing point
D). alcohol is cheaper than mercury
Answer: alcohol has a very low freezing point
122). On heating a circular metallic disc with a circular hole at the centre, the diameter of the hole will
A). decrease
B). remain the same
C). increase
D). first increase, then decrease
Answer: increase
123). When a certain mass of liquid is heated in a glass flask
A). the density of the liquid remains unchanged
B). the density of the liquid increases
C). the liquid level starts rising at once
D). the liquid level falls first and then starts rising
Answer: the liquid level falls first and then starts rising
124). When a cube of ice floating on water in a beaker melts, the level of water in the beaker
A). rises
B). falls
C). remains the same
D). first rises and then falls
Answer: remains the same
125). If water in a lake were to behave like other liquids, then in extremely cold weather it would freeze
A). from top to bottom
B). from bottom to top
C). simultaneously throughout the depth
D). first on the surface, bottom and sides and then in the interior.
Answer: from bottom to top
126). The temperature of the top of a frozen lake is 15 degree C; What is the temperature of the water in the lake in contact with the ice layer?
A). 0∘C
B). 4∘C
C). −15∘C
D). −7.5∘C
Answer: 0∘C
127). Fish can survive inside a frozen lake because
A). fish are warm blooded animals
B). fish hibernate in ice
C). water near the bottom does not freeze
D). ice is a good conductor of heat .
Answer: water near the bottom does not freeze
128). What happens when water is cooled from 8 degree C to 0 degree C?
A). its volume decreases uniformly, becoming minimum at 0 degree C.
B). its density increases uniformly, attaining maximum value at 0 degree C.
C). its volume decreases up to 4 degree C and then increases.
D). its density decreases up to 4 degree C and then increases.
Answer: its volume decreases up to 4 degree C and then increases.
129). The best conductor of heat among liquid is
A). water
B). mercury
C). ether
D). alcohol
Answer: mercury
130). An iron hammer, lying in the sun, appears much hotter than its wooden handle because
A). iron is at a higher temperature
B). iron is darker than wood
C). iron absorbs more heat
D). iron is a good conductor of heat
Answer: iron is a good conductor of heat
A). alcohol is a better conductor of heat
B). alcohol can be coloured and its level is seen easily
C). alcohol has a very low freezing point
D). alcohol is cheaper than mercury
Answer: alcohol has a very low freezing point
122). On heating a circular metallic disc with a circular hole at the centre, the diameter of the hole will
A). decrease
B). remain the same
C). increase
D). first increase, then decrease
Answer: increase
123). When a certain mass of liquid is heated in a glass flask
A). the density of the liquid remains unchanged
B). the density of the liquid increases
C). the liquid level starts rising at once
D). the liquid level falls first and then starts rising
Answer: the liquid level falls first and then starts rising
124). When a cube of ice floating on water in a beaker melts, the level of water in the beaker
A). rises
B). falls
C). remains the same
D). first rises and then falls
Answer: remains the same
125). If water in a lake were to behave like other liquids, then in extremely cold weather it would freeze
A). from top to bottom
B). from bottom to top
C). simultaneously throughout the depth
D). first on the surface, bottom and sides and then in the interior.
Answer: from bottom to top
126). The temperature of the top of a frozen lake is 15 degree C; What is the temperature of the water in the lake in contact with the ice layer?
A). 0∘C
B). 4∘C
C). −15∘C
D). −7.5∘C
Answer: 0∘C
127). Fish can survive inside a frozen lake because
A). fish are warm blooded animals
B). fish hibernate in ice
C). water near the bottom does not freeze
D). ice is a good conductor of heat .
Answer: water near the bottom does not freeze
128). What happens when water is cooled from 8 degree C to 0 degree C?
A). its volume decreases uniformly, becoming minimum at 0 degree C.
B). its density increases uniformly, attaining maximum value at 0 degree C.
C). its volume decreases up to 4 degree C and then increases.
D). its density decreases up to 4 degree C and then increases.
Answer: its volume decreases up to 4 degree C and then increases.
129). The best conductor of heat among liquid is
A). water
B). mercury
C). ether
D). alcohol
Answer: mercury
130). An iron hammer, lying in the sun, appears much hotter than its wooden handle because
A). iron is at a higher temperature
B). iron is darker than wood
C). iron absorbs more heat
D). iron is a good conductor of heat
Answer: iron is a good conductor of heat
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