MCQ Questions for Class 11 Physics Chapter 11 Thermal Properties of Matter with Answers

Check the below NCERT MCQ Questions for Class 11 Physics Chapter 11 Thermal Properties of Matter with Answers Pdf free download. MCQ Questions for Class 11 Physics with Answers were prepared based on the latest exam pattern. We have provided Thermal Properties of Matter Class 11 Physics MCQs Questions with Answers to help students understand the concept very well.

Q1. Absorptive power of perfectly black body is

(a) Zero
(b) Infinity
(c) One
(d) Constant

(c) One

Q2. A black body at hot temperature at 227°C radiates heat at a rate of 5 cal/cm²s. at a temperature of 727°C the rate of heat radiated per unit area will be

(a) 50 cal/cm²s
(b) 250 cal/cm²s
(c) 80 cal/cm²s
(d) 100 cal/cm²s

(c) 80 cal/cm²s

Q3. A body cools from 50°C to 46°C in 5 minutes and to 40°C in the next 10 minutes. The surrounding temperature is

(a) 30°C
(b) 28°C
(c) 36°C
(d) 32°C

(a) 30°C

Q4. For which of the following process, the thermal conduction is maximum?

(a) Combustion
(b) Radiation
(c) Convection
(d) Conduction

(b) Radiation

Q5. A bucket full of hot water is kept in a room and it cools from 75°C to 70°C in t1 minutes from 70°C to 65°C in t2 minutes and from 65°C to 60°C in t3 minutes; then

(a) t1 – t2 = t3
(b) t1 < t2 < t3

(c) t1 > t2 > t3
(d) t1 < t2 > t3

(b) t1 < t2 < t3

Q6. The good absorber of heat are

(a) Non-emitter
(b) Poor-emitter
(c) Good-emitter
(d) Highly polished

(c) Good-emitter

Q7. Two stars A and B radiate maximum energy at 3600°A and 3600°A respectively. Then the ratio of absolute temperatures of A and B is

(a) 256 : 81
(b) 81 : 256
(c) 3 : 4
(d) 4 : 3

(d) 4 : 3

Q8. A person with dark skin as compared to a person with white skin will experience

(a) Less heat and less cold
(b) More heat and more cold
(c) More heat and less cold
(d) Less heat and more cold.

(b) More heat and more cold

Q9. A cup of tea cools from 80°C to 60°C in one minute. The ambient temperature is 30°C. in cooling from 60°C to 50°C, it will take.

(a) 50 sec
(b) 90 sec
(c) 60 sec
(d) 30 sec

(a) 50 sec

Q10. The best ideal black body is

(a) Lamp of charcoal heated to high temperature
(b) Metal coated with a black dye
(c) Glass surface coated with coalter
(d) Hollow enclosure blackened inside and having a small hole

(d) Hollow enclosure blackened inside and having a small hole

Q11. The earth intercepts approximately one billionth of the power radiated by the sun. if the surface temperature of the sun were to drop by a factor of 2, the average radiant energy incident on earth per second would reduce by factor of

(a) 2
(b) 4
(c) 8
(d) 16

(d) 16

Q12. The process of heat transfer in which heat is transferred with actual migration of medium particles is known as (AFMC-94)

(a) Conduction
(b) Convection
(c) Radiation
(d) Reflection

(b) Convection

Q13. Unit of Stefans constant is given by

(a) W/ m K²
(b) W/ m² K²
(c) W²/ m² K4
(d) W/ mK

(b) W/ m² K²

Q14. The reading of Centigrade thermometer coincides with that of Fahrenheit thermometer in a liquid. The temperature of the liquid is

a) 40°C
b) 100°C
c) 313°C
d) 0ºC

a) 40°C

Q15. Expansion during heating

a) generally decreases the density of a material
b) None of these
c) increases the weight of a material
d) occurs only in solids

a) generally decreases the density of a material

Q16. Which of the following will expand the most for same rise in temperature?

a) Aluminium
b) Wood
c) Glass
d) All will expand same

a) Aluminium

Q17. An iron tyre is to be fitted on to a wooden wheel 1m in diameter. The diameter of tyre is 6 mm smaller than that of wheel. The tyre should be heated so that its temperature increases by a minimum of (the coefficient of cubical expansion of iron is 3.6 × 10–5/°C)

a) 500°C
b) 334°C
c) 1000°C
d) 167°C

a) 500°C

Q18. Assertion: The triple point of water is a standard fixed point in modern thermometry.
Reason: The triple point of a substance is unique i.e. it occurs at one particular set of values of pressure and temperature

a) Assertion is correct, reason is correct; reason is a correct explanation for assertion
b) Assertion is incorrect, reason is correct
c) Assertion is correct, reason is correct; reason is not a correct explanation for assertion
d) None of these

a) Assertion is correct, reason is correct; reason is a correct explanation for assertion

Q19. A metal sheet with a circular hole is heated. The hole

a) gets larger
b) gets deformed
c) gets smaller
d) None of these

a) gets larger

Q20.A solid ball of metal has a spherical cavity inside it. The balln is heated. The volume of cavity will

a) increase
b) decrease
c) remain unchanged
d) have its shape changed

a) increase

Q21. Assertion : Water kept in an open vessel will quickly evaporate onthe surface of the moon.
Reason : The temperature at the surface of the moon is much higher than boiling point of the water.

a) Assertion is correct, reason is incorrect
b) None of these
c) Assertion is correct, reason is correct; reason is not a correct explanation for assertion
d) Assertion is correct, reason is correct; reason is a correct explanation for assertion

a) Assertion is correct, reason is incorrect

Q22. Two marks on a glass rod 10 cm apart are found to increase their distance by 0.08 mm when the rod is heated from 0°C to 100°C. A flask made of the same glass as that of rod measures a volume of 1000 cc at 0°C. The volume it measures at 100°C in cc is

a) 1002.4
b) 1008.2
c) 1004.2
d) 1006.4

a) 1002.4

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