The products formed when diethyl ether is reacted with cold $HI$ are

Foetal ejection reflex in human female is induced by

From a solid sphere of mass $M$ and radius $R$,a cube of maximum possible volume is cut. The moment of inertia of the cube about an axis passing through its centre and perpendicular to one of its faces is

$A$ thin circular ring of mass $M$ and radius $r$ is rotating about its axis with a constant angular velocity $\omega$. Two objects each of mass $m$ are attached gently to the opposite ends of a diameter of the ring. The ring will now rotate with an angular velocity:

The number of ways that $8$ beads of different colours can be strung as a necklace is

The molarity of pure water is