61
What is the physical state of water at 12° Celsius?
A)
Gas
B)
Solid
C)
Liquid
D)
Ionic
Answer & Solution
Answer: Option
C
62
Which one of the following statement with regarding to expansion of materials due to heating is not correct?
A)
As ice melts, it expands uniformly upto 4°C
B)
Mercury thermometer works using the principle of expansion due to heating
C)
Small gap is kept between two rails to allow for expansion due to heating
D)
The length of metallic wire increases when its temperature is increased
Answer & Solution
Answer: Option
A
63
Which of the following devices can be used to detect radiant heat?
A)
Liquid thermometer
B)
Six's maximum and minimum thermometer
C)
Constant volume air thermometer
D)
Thermopile
Answer & Solution
Answer: Option
D
64
Lakes freeze in cold countries in winter, leaving the water underneath at
A)
0° C
B)
0° F
C)
4° C
D)
4° F
Answer & Solution
Answer: Option
C
65
How much mechanical work must be done to completely melt 1g of ice at 0°C?
A)
4.2 J
B)
80 J
C)
336 J
D)
2268 J
Answer & Solution
Answer: Option
B
66
Which of the following thermodynamic process of constant volume is called?
A)
Isobar
B)
Symmetric
C)
Adiabatic
D)
Isochoric
Answer & Solution
Answer: Option
D
67
Thermostat is related to
A)
Humidity
B)
Temperature
C)
Air
D)
Clouds
Answer & Solution
Answer: Option
B
68
What is the freezing point of water on Kelvin scale?
A)
173.15 K
B)
373.15 K
C)
473.15 K
D)
273.15 K
Answer & Solution
Answer: Option
D
69
Which electric device is not based on Joule's law of heating?
A)
Electric kettle
B)
Electric plugs and switches
C)
Electric iron
D)
Fuse used in an electric circuit
Answer & Solution
Answer: Option
B
70
Match the following.
List-I List-II
a. Zeroth Law of Thermodynamics
1. Give us the concept of temperature
b. First Law of Thermodynamics
2. Defines internal energy
c. Second Law of Thermodynamics
3. Change in internal energy is zero
d. In a complete cycle of changes
4. The efficiency of on engine is always less than unity
A)
a-1, b-2, c-3, d-4
B)
a-1, b-2, c-4, d-3
C)
a-4, b-3, c-2, d-1
D)
a-3, b-2, c-4, d-1
Answer & Solution
Answer: Option
B
