161. Match items from groups I, II, III, IV and V.
     

1. 1. F–G–J–K–M
      E–G–I–K–N

   
   
   

   2. F–G–I–K–M
      F–H–I–K–N

   
   
   

   3. F–H–J–L–N
      E–H–I–L–M

   
   
   

   4. E–G–J–K–N
      F–H–J–K–M

   
   
   

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   Correct Option: D

   

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162. The specific heats of an ideal gas depend on its

1. 1. Temperature

   
   
   

   2. Pressure

   
   
   

   3. Volume

   
   
   

   4. Molecular weight and structure

   
   
   

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   Temperature C is the amount of heat required to increase the temperature of a substance by 1 °C or 1K per kg.
   

   Correct Option: A

   Temperature C is the amount of heat required to increase the temperature of a substance by 1 °C or 1K per kg.
   

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163. The definition of 1 K as per the internationally accepted temperature scale is

1. 1. 1/100^th the difference between normal boiling point and normal freezing polnt of water

   
   
   

   2. 1/273.15^th the normal freezing point of water

   
   
   

   3. 100 times the difference between the triple point of water and the normal freezing point of water

   
   
   

   4. 1 /273.16^th of the triple point of water

   
   
   

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   NA

   Correct Option: D

   NA

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164. An insulated rigid vessel contains a mixture of fuel and air. The mixture is ignited by a minute spark. The contents of the vessel experience

1. 1. Increase in temperature, pressure and energy
      

   
   
   

   2. Decrease in temperature, pressure and energy

   
   
   

   3. Increase in temperature and pressure but no change in energy

   
   
   

   4. Increase in temperature and pressure but decrease in energy

   
   
   

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   Increase in temperature and pressure but no change in energy Temperature increases
   Volume = constant; p – decreases
   ∆ Q = 0 (insulated)

   Correct Option: C

   Increase in temperature and pressure but no change in energy Temperature increases
   Volume = constant; p – decreases
   ∆ Q = 0 (insulated)

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165. During a non-flow thermodynamic process (1– 2) execut ed by a per fect gas, t he heat interaction is equal to the work interaction (Q_1.2 = W₁₂) when the process is

1. 1. Adiabatic

   
   
   

   2. Polytropic

   
   
   

   3. Isothermal

   
   
   

   4. Isentropic

   
   
   

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   For isothermal process
   δ U = 0
   As per 1^st law of thermodynamics
   
   δ Q = δ W

   Correct Option: C

   For isothermal process
   δ U = 0
   As per 1^st law of thermodynamics
   
   δ Q = δ W

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