Persistent nucellus in the seed is known as

The solution of $\frac{dy}{dx} = \frac{y^2}{xy - x^2}$ is

The number of oxygen atoms bonded to one phosphorous atom in $P_4O_6$ is

Which of the following statements is incorrect for physical adsorption?

Diazo-coupling is useful to prepare some

The minimum force required to move a body up an inclined plane is three times the minimum force required to prevent it from sliding down the plane. If the coefficient of friction between the body and the inclined plane is $\frac{1}{2 \sqrt{3}}$,then the angle of the inclined plane is (in $^{\circ}$)