The dimensional formula ML^ -1 T^ -2 can represent

The dimensional formula for coefficient of viscosity is $[\eta] = \dfrac{[F]}{[A][\dfrac{dv}{dx}]} = \dfrac{MLT^{-2}}{L^2 T^{-1}} = ML^{-1}T^{-1}$.

The dimensional formula for surface tension is $[S] = \dfrac{[F]}{[L]} = \dfrac{MLT^{-2}}{L} = MT^{-2}$.

The dimensional formula for modulus of elasticity is $[E] = \dfrac{\text{Stress}}{\text{Strain}} = \dfrac{[F]/[A]}{1} = \dfrac{MLT^{-2}}{L^2} = ML^{-1}T^{-2}$.

The dimensional formula for moment of a force is $[\tau] = [r][F] = L \cdot MLT^{-2} = ML^2T^{-2}$.

Thus, $ML^{-1}T^{-2}$ represents modulus of elasticity.