Hemp fibers are obtained from which plant?

What is the biological concentration of $DDT$ in the body fat of Indian people?

The silicate having one monovalent corner oxygen atom in each tetrahedron unit is:

$A$ monoatomic ideal gas,initially at temperature $T_1$,is enclosed in a cylinder fitted with a frictionless piston. The gas is allowed to expand adiabatically to a temperature $T_2$ by releasing the piston suddenly. If $L_1$ and $L_2$ are the lengths of the gas column before and after expansion respectively,then $\frac{T_1}{T_2}$ is given by:

Coordination compounds have great importance in biological systems. In this context,which of the following statements is incorrect?

Two identical flutes produce fundamental notes of frequency $300\,Hz$ at $27\,^{\circ}C.$ If the temperature of air in one flute is increased to $31\,^{\circ}C,$ the number of beats heard per second will be