Modern Physics PYQ — Page 28

If mass-energy equivalence is taken into account, when water is cooled to form ice, the mass of water should

Formation of covalent bonds in compounds exhibits

Sodium and copper have work functions $2.3 \mathrm{eV}$ and $4.5 \mathrm{eV}$ respectively. Then the ratio of the wave lengths is nearest to

If $13.6 \mathrm{eV}$ energy is required to ionize the hydrogen atom, then the energy required to remove an electron from $n=2$ is