The mechanical quantity, which has dimensions of reciprocal of mass $\left(\mathrm{M}^{-1}\right)$ is
The mechanical quantity, which has dimensions of reciprocal of mass $\left(\mathrm{M}^{-1}\right)$ is
Torque
Gravitational constant
Angular momentum
Coefficient of thermal conductivity
Solution
We know that, $F=\frac{G M_1 M_2}{r^2}$
$\begin{aligned} & \Rightarrow \quad[G]=\frac{[F]\left[r^2\right]}{\left[M_1\right]\left[M_2\right]}=\frac{\left[\mathrm{MLT}^{-2}\right]\left[\mathrm{L}^2\right]}{[\mathrm{M}][\mathrm{M}]} \\ & \Rightarrow[G]=\left[\mathrm{M}^{-1} \mathrm{~L}^3 \mathrm{~T}^{-2}\right]\end{aligned}$
i.e., gravitational constant is mechanical quantity which has dimensions of reciprocal of mass $\left(\mathrm{M}^{-1}\right)$