Question

In the equation $\left( P + \frac{a}{V^{2}} \right)$ (V – b) = RT, the SI unit of a is

• A. (a) N m²
• A. (b) N m⁴
• A. (c) N m^–3
• A. (d) N m^–2

Answer 1

(b)

Sol. P + $\frac{a}{V^{2}}$ = 0; $\frac{a}{V^{2}}$ = pressure

Sol. [a] = $\frac{MLT^{- 2}}{L^{2}}$ . L⁶ = MLT^–2.L⁴ = F.L⁴ = Nm⁴