Question

Plz ans.q.no.19 with steps

Answer 1

Remember:
We can add two numbers only if both have same dimensions.

In P + a/V^2 both P and a/V^2 has dimensions of pressure.

Dimensional formula of pressure = [M L^-1 T^-2]

∴ Dimensions of Pressure = a / (dimension of volume)^2
[M L^-1 T^-2] = a / [L^3]^2

a = [M L^5 T^-2]

Correct option is (A)