The temperature at which a real gas obeys ideal gas laws over an appreciable range of pressure is called:

If $A \cap B = B$,then

If $u=\sin ^{-1}\left(\frac{x^4+y^4}{x+y}\right)$, then $x \frac{\partial u}{\partial x}+y \frac{\partial u}{\partial y}$ is equal to

Four thin rods of same mass $M$ and same length $l$ form a square as shown in the figure. The moment of inertia of this system about an axis passing through the centre $O$ and perpendicular to its plane is

In biennial plants,normally the number of carpels is:

The gas used in the hydrogenation of vegetable oils in the presence of nickel as catalyst is