$CrO_3$ dissolves in aqueous $NaOH$ to give:

Which of the following pairs of organs includes only the endocrine glands?

The ratio of angular speeds of the minute hand and the hour hand of a watch is:

The acceleration due to gravity is measured on the surface of the Earth by using a simple pendulum. If $\alpha$ and $\beta$ are relative errors in the measurement of length and time period respectively,then the percentage error in the measurement of acceleration due to gravity is ................

The compound insoluble in acetic acid is

If $x^2+px+1$ is a factor of the expression $ax^3+bx+c$,then