Q71 / 90 · JEE Main 2023 (13 Apr Shift 2) · Physics

In the equation X+aY2[Y-b]=RT, X is pressure, Y is volume, R is universal gas constant and T is temperature. The physical quantity equivalent to the ratio ab is:

 

  • A
    Pressure gradient
  • Correct answer
    B
    Energy
  • C
    Impulse
  • D
    Coefficient of viscosity

Solution

X & aY2 have the same dimensions. Y & b also have the same dimensions.

Therefore,

aY2=ML-1T-2⇒a=ML-1T-2×L6=ML5T-2

and b=L3.

So, the dimensions of ab is,

ab=ML5T-2L3=ML2T-2.

This is the dimensional form of energy. Hence, this is the right option.

Hence, the correct answer is option: 'B'.

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