Reserpine is obtained from ...... .

During the depression of freezing point in a solution,which of the following are in equilibrium?

Consider a system of three charges $\frac{q}{3}, \frac{q}{3}$ and $\frac{-2q}{3}$ placed at points $A, B$ and $C$,respectively,as shown in the figure. Take $O$ to be the centre of the circle of radius $R$ and angle $\angle CAB = 60^{\circ}$.

Which of the following is most reactive towards alcoholic $KOH$?

Let $n = 1! + 4! + 7! + \ldots + 400!$. Then the ten's digit of $n$ is

Liquids $A$ and $B$ form an ideal solution. If $X_A$ and $Y_A$ are the mole fractions of $A$ in the solution and in vapour phase in equilibrium,respectively,then (Given $P_A^o > P_B^o$):