The compound insoluble in acetic acid is

Hydrolysis of sucrose with dilute aqueous sulphuric acid yields

$1.5 \ g$ of $CdCl_2$ was found to contain $0.9 \ g$ of $Cd$. Calculate the atomic weight of $Cd$.

The sensation of fatigue in the muscles after prolonged strenuous physical work is caused by

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 ................

Companion cells in plants are associated with