JEE PHYSICS MCQ: UNITS & MEASUREMENTS

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Analyzing +4 | -1

The Vander Waal’s equation of state for real gases is given as

\left( {P + \frac{a}{{{V^2}}}} \right)\left( {V - b} \right) = nRT

which of the following terms has dimensions different from that of energy

View answer and explanation

Correct option: B

\frac{a}{{{V^2}}}

Option B is correct. The term

\frac{a}{V^2}

has the dimensions of pressure, not energy, making it dimensionally different from PV, bP, and

\frac{ab}{V^2}

which all have dimensions of energy.

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