$AlCl_3$ is:

The angle of elevation of the top of a $T.V.$ tower from three points $A, B, C$ in a straight line through the foot of the tower are $\alpha, 2\alpha, 3\alpha$ respectively. If $AB = a$,the height of the tower is

The reaction $RCOCl + H_2 \xrightarrow{Pd/BaSO_4} RCHO + HCl$ is known as:

In $........$ and $........$ organisms or the parent cell divides into two to give rise to new individuals.

Identify the non-reducing sugar from the following.

$A$ plane passing through $(-1, 2, 3)$ and whose normal makes equal angles with the coordinate axes is