Phenol reacts with $CHCl_3$ and $NaOH$ at $340 \ K$ to give .......

Two rain drops reach the earth with different terminal velocities having ratio $9:4$. Then the ratio of their volumes is

Which of the following substances has the highest boiling point?

The value of $\int_{-1}^{1} (\sqrt{1 + x + x^2} - \sqrt{1 - x + x^2}) \, dx$ is

Which of the following is not a class of Bryophytes?

If $\int \frac{\cos x-\sin x}{\sqrt{8-\sin 2 x}} d x=a \sin ^{-1}\left(\frac{\sin x+\cos x}{b}\right)+c$ where $c$ is a constant of integration,then the ordered pair $(a, b)$ is equal to