Question

1. Which of the following is true?
a) Sea breeze happens during night time when the sea is cooler than the land.
b) Sea breeze happens during day time when the land is cooler than the sea.
c) Land breeze happens during night time when the land is cooler than the sea.
d) Land breeze happens during day time when the sea is cooler that the land.
When a solid melts, the temperature remains constant even though heat is being supplied because
a) The heat is being used to break up the intermolecular bonds.
b) The solid is not absorbing any heat
c) The molecules are moving faster
d) The molecules are far apart.
A liquid changes into a gas at a constant temperature known as its
a) Absolute zero b) Boiling point c) Evaporation point d) Dew point
Cooling always accompanies evaporation because
a) The air molecules cool the liquid surface
b) The more energetic molecules leave the liquid
c) There are fewer liquid molecules left in the liquid
d) The escaped molecules return to the liquid
Amit found that a glass P was stuck inside another glass Q. What could he do to separate the two glasses?
a) Pour hot water into glass P and put glass Q in hot water
b) Pour hot water into glass P and put glass Q in cold water
c) Pour cold water into glass P and put glass Q in cold water.
d) Pour cold water into glass P and put glass Q in hot water.
There is a hole in the middle of a copper plate. When heating the plate, diameter of hole would
a) Always increase b) Always decrease
c) Remains the same d) None of these
In which of the following process convection does not take place primarily?
a) Sea and land breeze b) Trade wind
c) Boiling and water d) Warming of glass of bulb due to filament
Mud houses are cooler in summer and warmer in winter because
a) Mud is a good conductor of heat
b) Mud is a superconductor of heat
c) Mud is a bad conductor of heat
d) None of these
The equatorial and polar regions of the earth receive unequal solar heat. The convection current arising due to this is called
a) Land breeze b) Sea breeze c) Trade wind d) Tornado
The transmission of heat by conduction is possible in case of:
a) solids b) liquids c) gases d) all the above
Aluminium is a better conductor of heat that wood. It is so because
a) Aluminium has a higher density than wood
b) Aluminium has a higher specific heat capacity than wood.
c) Aluminium has more free electrons that wood
d) Aluminium has a higher mass than wood.
Which of the following statements about radiation is/are true?
1. Radiation can pass through solids. 2. Radiation can pass through liquids.
3. Radiation can pass through gases.
a) 3 only b) 2 and 3 only c) 1 and 3 only d) 1, 2 and 3
Petrol storage tanks are not painted black because
a) Black is good conductor of heat
b) Black is bad conductor of heat
c) Black is good emitter of radiation
d) Black is good absorber of radiation.

Which of the following is false?
a) We wear white to keep ourselves warm during winter.
b) We wear white to keep ourselves cool during summer.
c) Aluminium foils are used to keep food warm
d) Pipes are painted black to minimize transfer of thermal energy.
Container A and Container B are filled with equal amount of boiling water and the temperature of the water in the containers is measured with a thermometer some time later. It is observed that container A has a much lower temperature than container B. What are the possible reason(s)?
1. Container A is black and container B is silver.
2. Container A has a lid and container B is not covered.
3. Container A is made of steel and container B is made of clay.
a) 1 and 2 only b) 1 and 3 only c) 2 and 3 only d) 1, 2 and 3
Assertion and Reason Type:
Directions: In each of the following questions, a statement of Assertion (A) is given followed by a corresponding statement of Reason (R ) just below it. Of the statements, mark the correct answer as
a) If both assertion and reason are true and reason is the correct explanation of assertion
b) If both assertion and reason are true but reason is not the correct explanation of assertion
c) If assertion is true but reason is false
d) If assertion is false but reason is true.
Assertion: Temperature is the measure of the heat energy.
Reason: Energy is the capacity to do work.
Assertion: Radiation is a process of transfer of heat in which a material medium is not necessary.
Reason: The heat from the sun reaches us through millions of miles of empty space by convection.
Assertion: Heat energy is transferred from one body to another due to a temperature difference between them.
Reason: Heating a substance causes a rise in temperature.
Assertion: When a very hot liquids is poured into a thick glass tumbler it cracks.
Reason: Unequal expansion of the inner and outer glass walls causes the glass to crack.​

Answer 1

Answer:

Yes

You read the book it is written there

Answer 2

Yes it is right answer