Temperature

Q. Calculate the specific latent heat of fusion of a solid if 25 g of it requires 8400 J of heat energy for melting.

1. $3.36\times {10}^{5}J/kg$
2. $4.36\times {10}^{5}J/kg$
3. $6.36\times {10}^{5}J/kg$
4. $5.36\times {10}^{5}J/kg$

Q.

Why is the thermometer kept under the tongue?

Q.

Explain, how land and sea breezes occur?

Q. Kinetic energy of the molecules of a substance increases with increase in__________.

1. volume
2. area
3. mass
4. temperature

Q.

Assertion (A): The sea and land breezes are formed due to convection current of air.
Reason (R): During the day time, sea water gets heated faster than land.

1. A and R are true and R is the correct explanation of A.

2. A and R are true, but R is not the correct explanation of A.

3. A is true but R is false.

4. Both A and R are false.

Q. What happens when we increase the temperature of a substance?

1. Kinetic energy of the molecules increases
2. Molecules becomes stationary
3. Kinetic energy of the molecules decreases
4. Molecules starts to move in a particular direction

Q.

Is hatred a physical quantity?

Q. Temperature is a measure of:

1. mass of the molecules of a body
2. degree of hotness or coldness of a body
3. number of molecules in a body
4. pressure on the molecules

Q. Arrange the following in the order of decreasing temperature:

1. Cold water
2. The Sun
3. Ice cream
4. Hot tea

1. $1-3-2-4$
2. $3-1-4-2$
3. $1-2-3-4$
4. $4-3-2-1$

Q. is the S.I unit of temperature.

1. Degree Celsius
2. Degree Fahrenheit
3. Kelvin

Q.

Himanshu has three buckets as shown below. He puts his right-hand in bucket A and left-hand in bucket B. He then puts both of his hands in a bucket with water at room temperature. His right-hand feels that the water in the new bucked is hotter while his left-hand feels it as colder.Select the correct option:

1. Water in bucket A is hotter than water in bucket B.
2. Water in bucket B is hotter than water in bucket A.
3. Water in bucket A and B are equally hot.
4. Insufficient information

Q.

The rise and fall in temperature can be measured with the help of a_______[barometer/thermometer]

Q. Molecules of a solid vibrate with larger amplitude at:

1. zero temperature
2. lower temperature
3. higher temperature
4. zero pressure

Q.

The temperature is recorded by --------------------------.

Q.

In summer, if a wooden chair and an iron chair both kept in the sun are touched, which of the following will appear warmer?

1. Both will appear equally warmer

2. Wooden chair

3. Iron chair

4. Cannot be determined

Q.

__________ determines the degree of hotness or coldness of a body.

Q. Normal temperature of a human body is ____ degree celcius.

1. 37
2. 96.8
3. 98.6
4. 100

Q.

Given below are four objects:

(i) Base of a frying pan

(ii) Ice cream

(iii) Snow

(iv) Molten wax

Which of the following object(s) given above is/are hot?

1. iii and iv
2. i only
3. i, ii and iii
4. i and iv

Q. A reliable measure of the degree of hotness or coldness of a body is:

1. Color
2. Fumes coming from the body
3. Temperature
4. All of these

Q.

Himanshu has three buckets as shown below. Suppose he puts his right hand in bucket A and his left hand in bucket B. Then, he puts both of his hands in normal water. His right-hand feels that the water here is hot and his left-hand feels it is cold. Select the correct option:

1. A is hotter than B

2. B is hotter than A

3. A and B are equally hot

4. Can’t be said

Q. statement (1): A solid on heating undergoes expansion only because of increasing the amplitude of the simple oscillators.

1. statement 1 and statement 2 are correct and statement 2 is correct explanation for statement 1
2. statement 1 and statement 2 are correct and statement 2 is not correct explanation for statement 1
3. statement 1 is true and statement 2 is false
4. statement 1 is wrong and statement 2 is true

Q. Match the columns in the correct order.

1. Measure of hotness
2. Thermal energy flow
3. Heat transfer rate is high
4. Heat transfer rate is low

Q. What can you say about the particles of the system when we increase the temperature of the system?

1. Particles remain as it is
2. Particles become more active
3. Particles become less active
4. Particles move out of the system

Q.

________ thermometer is used to measure the body temperature.

Q.

What physical quality determines the flow of heat energy?

Q. The surface temperature of the Sun is about _________.

1. 6500$°$C
2. 5500$°$C
3. 5000$°$C
4. 6000$°$C

Q.

What is a land breeze?