 # Multiple choice questions on thermal properties of matter

In this page we have Multiple choice questions on thermal properties of matter for Class 11,JEE and NEET . Hope you like them and do not forget to like , social share and comment at the end of the page.

## Multiple Choice questions

Question 1:
There are three Rods A,B,C of equal length L at same temperature .There coefficient of linear expansion are αa, αb, αr   respectively. if the temperature of all rod are increased by θ ° C and coefficient of linear expansion is like αbac. then what will be the final order of length of rod
a. Lc>Lb>Lc
b. Lb= La= Lc
c. La>Lb>Lc
d. Lb>La>Lc

Question-2:
Three bodies are having temperature
TA = - 42 °F
TB = - 10 °C
TC = 2000 K
Which body among these is most warm
a, TA
b, TB
c, TC
d, None of these

Question-3
A sphere of mass m and diameter D is Heated by temperature ΔT , if Coefficient of linear expansion is α what will be the change in the Surface Area
a, π D2α ΔT (α ΔT+ 2)
b. π D2α ΔT (α ΔT- 2)
c. π D2α ΔT (α ΔT+ 4)
d. π D2α ΔT (α Δ- 4)

Question-4
if α is the Coefficient of linear expansion of block and L denotes length, T denotes Temperature then which one of these is true
a, dL - α L dT = 0
b, dL + α L dT = 0
c, αdL - L dT = 0
D, αdL - +L dT = 0

Question-5
Consider the following statement
A.If body A and body B are in state of thermal equilibrium, B & C are in state of thermal equilibrium then A & C are in Equilibrium
B. If body A and body B are not in equilibrium and A & C are not in thermal equilibrium then B & C may be in thermal equilibrium.
a. Only A is Correct
b. Only b is Correct
c. A & B is Correct
d. Neither is correct

Question-6
For any material, density ρ , mass m and volume V are related by ρ = m/V and B is coefficient of volume expansion then which one is true
a, B = (1/ρ) (dρ/ dT)
b, B = -(1/ρ) (dρ/ dT)
C, B = (1/ρ) (dρ/ dV)
d, B = (1/ρ) (dρ/ dV)

Question-7
A constant volume air thermometer works on
a, Pascal law
b, Charles law
c, Boyles law
d, Archimedes

Question-8
10 litres of benzene weight
a, more in summer than in winter
b, more in winter than in Summer
c, equal in winter and summer
d, none of above

Question-9
An Aluminium Rod of length L0rest on a smooth horizontal base if the temperature is increase by ΔT °C. What will be the longitudinal strain developed
a, αΔT
B, Zero
c. -αΔT
D. none of the above

Question-10
A metal ball immersed in alcohol weight m1 at 0 °C and m2 at 150 °C. The coefficient of cubical expansion of the metal is less than that of alcohol. Assuming that density of metal is large as compared to that alcohol ,it can be shown
a. m1- m2>0
b. m1- m2<0
c. m1=m2
d none of the above

Question-11
if a is coefficient of Linear expansion, b coefficient of areal expansion, c coefficient of Volume expansion. Which of the following is true
a. b=2a
b. c=3a
c. b=3a
d. a=2b

Question-12
the coefficient of linear expansion of an in homogeneous rod changes linearly from α1to α2from one end to the other end of the rod. The effective coefficient of linear expansion of the rod is

a. α12
b. 1/2(α12)
c. √α1α2
d. None of the these

Question 13
Which of the following devices is used to detect thermal radiation?
a. Thermopile
b. Constant volume air thermometer
c. Liquid thermometer
d. Six Maximum and minimum thermometer

Question 14
The sprinkling of water reduces the temperature of the closed room
a. The water has large latent heat of vaporization
b. Water is bad conductor of heat
c. Specific heat of water is high
d. the temperature of water is less than that of room

Question 15
As the temperature is increased, the time period of a pendulum
(a) increases as its effective length increases even though its centre of mass still remains at the centre of the bob.
(b) decreases as its effective length increases even though its centre of mass still remains at the centre of the bob.
(c) increases as its effective length increases due to shifting of centre of mass below the centre of the bob.
(d) decreases as its effective length remains same but the centre of mass shifts above the centre of the bob