Where is the Natural History Museum located?

If the angles of a triangle are in the ratio $1: 1: 4$,then the ratio of the perimeter of the triangle to its largest side is

In a sinusoidal wave,the time required for a particular point to move from maximum displacement to zero displacement is $0.170 \,s$. The frequency of the wave is ........ $Hz$.

What is the volume (in litres) of oxygen at $STP$ required for complete combustion of $32 \ g$ of $CH_4$ ? (Molecular weight of $CH_4$ is $16$ )

Manganese is required in

Which one of the following orders is correct for the bond dissociation energies of halogen molecules?