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QJEEM19Ch04e6: JEE Main 2019 Chemistry - Class 11 JEEM19Ch04e6 Solution: The combination of plots which does not represent isothermal…

The combination of plots which does not represent isothermal expansion of an ideal gas is –

JEE Main 2019 (Online) 12th January Evening Slot Chemistry - Thermodynamics Question 136 English

Multiple Choice Options

  • A A and D
  • B B and D
  • C B and C
  • D A and C

Step-by-Step Verified Solution

For isothermal process of ideal gas,

PV = constants = K

∴\therefore   P = kv{k \over v}

So, the graph between P and 1v{1 \over v} is straight line passing through the origin. So, graph (A) is correct.

As PV = K so the P and V curve is hyperbola. So, graph (B) is wrong.

In isothermal PV = constant.

So, graph (C) is right.

We know internal energy (u) = f2{f \over 2} nRT. Internal energy is function of temperature (T) only. So, U does not change when volume(V) changes. So, graph (D) is wrong.

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