1st Year Physics Chapter 11 Heat and Thermodynamics Mcqs With Answers

This chapter is about Thermodynamics and you can get the 1st Year Physics Chapter 11 Heat and Thermodynamics Mcqs With Answers here. In this chapter, you will study Thermodynamics in which the conversion of heat into different forms of energy takes place. It describes the behavior of gases. The behavior of gases is well explained by the Kinetic Theory of Gases. Gases have a relation to Pressure and Temperature. Internal Energy is the sum of all the kinetic and potential energies of a substance. The First Law of Thermodynamics is very important to describe the relation between heat and work. There are two types of processes including Reversible and Irreversible processes takes place. A heat engine converts thermal energy into mechanical energy. Carnot engine is the base engine for all the other engines. Entropy is quite important in thermodynamics. So, these are the importance of this chapter. Have a look down for the MCQs.

1st Year Physics Chapter 11 Heat and Thermodynamics Mcqs With Answers

KEY POINTS

 

Question.1: At absolute temperature, the K.E of the molecules:

• Become minimum
• Become maximum
• Become zero
• None of these

Question.2: Temperature is a property, which determines?

• How much heat a body  contains
• Whether a body will feel hot or cold to touch
• In which direction heat will flow between two systems
• How much total absolute energy a body has

Question.3: We prefer mercury  as a thermometric substance because:

• Over a wide range of temperature, its expansion is uniform
• It does not stick to the thermometer glass
• Its boiling point is high
• All of the above

Question.4: The scales of temperature are based on two foxed points, which are

• The temperature of water at 0⁰C and 100⁰C
• The temperature of melting ice and boiling water at atmospheric pressure
• The temperature of ice-cold and boiling water
• The temperature of frozen and boiling mercury

Question.5: What does V represent in the equation PV/2=RT?

• The volume of n mole of gas
• Mass of 4g of gas
• Mass of 2gm of gas
• The volume of 2 moles of gas

Question.6: In a clinical thermometer, the mercury in the capillary tube does not contract once removed from the patient because______.

• Mercury takes a long time to contact
• The amount of mercury use is very small
• The capillary tube has a small constriction near the bulb
• The capillary tube is very narrow

Question.7: Normal human body temperature 98.6^oF corresponds to:

• 37oC
• 42oC
• 55oC
• 410oC

Question.8: The Fahrenheit and centigrade scales agree to:

• -40
• 542
• 15.5
• -273

Question.9: The kinetic energy of the molecular motion appears as_______.

• P.E
• Heat
• Temperature
• None of these

Question.10: Heating of water under atmospheric pressure is an:

• Adiabatic process
• Isothermal process
• Isochoric process
• Isobaric process

Question.11: According to pascal’s law, the pressure of a gas in a vessel is?

• Different in different directions
• Same in all direction
• Same only along with opposite directions
• Same only along with normal directions

Question.12: We can produce heat by?

• Frictional process
• Chemical processes
• Electrical processes
• All of the above

Question.13: Which one is true for internal energy?

• It is the sum of all forms of molecular energies of a system
• It is a state function of a system
• It is proportional to transitional K.E of the molecules
• All are correct

Question.14: At what temperature the adiabatic process is equivalent to the isothermal process?

• O⁰ C
• Zero Kelvin
• Critical temperature
• None of these

Question.15: Which one is not an example of the adiabatic process?

• Rapid escape of air from a burst tyre
• The rapid expansion of air
• Conversion of water into ice in the refrigerator
• Cloud formation in the atmosphere

Question.16: The pressure exerted by a column of mercury 76cm high and at 0oc is called_______.

• 1 atmosphere
• 1 newton per square meter
• 1 pascal
• Data is insufficient

Question.17: Standard condition refers to gas at:

• 76cm,0oc
• 760mm,273k
• 1 atm,273k
• All of the above

Question.18: If the volume of gas is held constant and we increase its temperature then?

• Its pressure is constant
• Its pressure rises
• Its pressure falls
• All of the above

Question.19: If the pressure of a given gas is held constant its density is inversely proportional to its absolute temperature. It is the statement of?

• Boyle’s law
• Charle’s law
• Ideal gas law
• Avagadro’s law

Question.20: Boyle’s law holds for ideal gases in______.

• Isochoric process
• Isobaric process
• Isothermal process
• Adiabatic process

Question.21: For a gas obeying Boyle’s law, if the pressure is doubled, the volume becomes:

• Double
• One half
• Four times
• One of the fourth

Question.22: During which process the volume of the system remains constant______.

• Isothermal
• Isobaric
• Isochoric
• Adiabatic

Question.23: Which of the following properties of molecules of a gas is the same for all gases at a particular temperature?

• Momentum
• Mass
• Velocity
• Kinetic energy

Question.24: In which process entropy remains constant?

• Isobaric
• Isochoric
• Adiabatic
• Isothermal

Question.25: Which statement of the second law of thermodynamics is based on a heat engine?

• Clausius statement
• Kelvin statement
• Carnot statement
• Boyles statement

Question.26: Which quantity is not a thermodynamic state function?

• Internal energy
• Heat energy
• Pressure
• Volume

Question.27: The value of y for diatomic gas is:

• 1.67
• 1.4
• 1.3
• None

Question.28: The work done in the isochoric process is_____.

• Constant
• Variable
• Zero
• Depends on the situation

Question.29: In the successful operation of the heat engine which condition should be met.

• Cyclic process
• Operated at a certain temperature difference
• Both a and b
• Not described

Question.30: The performance of a refrigerator is described as by_______.

• Efficiency
• Coefficient of performance
• Both a and b
• Not described