(a) PV = RT
   (b) p/V = RT
   (c) PV = RTy
   (d) pVy = RT
Ans: (a)
91.A fan produces a feeling of comfort during hot weather, because [NDA
   2010]
   (a) our body radiates more heat in air
   (b) fan supplies cool air
   (c) conductivity of air increases
   (d) our perspiration evaporates rapidly
Ans: (d)
92.Which one of the following statements is correct? [NDA 2010]
   (a) Only electrons reside inside the nucleus of an atom
   (b) Both electrons and protons reside inside the nucleus of an atom
   (c) Only neutrons reside inside the nucleus of an atom
   (d) Both protons and neutrons can reside inside the nucleus of an atom
Ans: (d)
93.Gases have two specific heat capacities:
   (a) one at the constant volume and another at the constant pressure
   (b) both at the constant volume
   (c) both at the constant pressure
   (d) none of these
Ans: (a)
94.The Carnot"s engine takes heat:
   (a) at constant temperature
   (b) at constant pressure
   (c) at constant volume
   (d) none of these
Ans: (a)
95.The Otto engine takes heat:
   (a) at constant temperature
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