Four physical quantities are listed in column I. Their values are listed in column II in random order.

Match the column correctly.

Explanation

1. At room temperature thermal energy of a gas molecule is,
`E=3/2 Kt=3/2xx1.38xx10^(-23)xx300=6.21xx10^(-21) J`
or `E=(6.21xx10^(21)//1.6xx10^(-19))=0.039 eV`
So, thermal energy of air molecule is of the order of 0.02 eV, i.e.,
`[a] rarr [e]`
2. Energy of the order of MeV is associates with nuclear phenomena such as fission, fusion, radioactivity or binding energy. So binding energy per nucleon is of the order of MeV, i.e.,
`[b] rarr [h]`
3. As X-rays are produced by kV potential difference across the X-ray tube, so energy of X-rays is of the order of keV, i.e.,
`[c] rarr [g]`
4. As atoms get ionised by few eV so the energy of light emitted by atoms is of the order of few eV, i.e.,
`[d] rarr [f]`