List of top Chemistry Questions on Quantum Mechanics asked in TS EAMCET

The angular momentum of electron in H atom in \(n_x\) state is \(1.051\times10^{-34}\,\mathrm{J\,s}\). The de Broglie wavelength of electron in this \(n_x\) state is \[ (h=6.6\times10^{-34}\,\mathrm{J\,s};\ \pi=3.14) \]

A metal was irradiated separately with radiation of wavelength (a) \(400\,\mathrm{nm}\), (b) \(500\,\mathrm{nm}\) and (c) \(600\,\mathrm{nm}\) respectively. Identify the wavelength(s) corresponding to which photoelectrons are emitted from the surface of that metal. \[ \left(\text{Work function}=2.25\,\mathrm{eV},\; h=6.6\times10^{-34}\,\mathrm{J\,s},\; c=3\times10^8\,\mathrm{m\,s^{-1}},\; 1\,\mathrm{eV}=1.6\times10^{-19}\,\mathrm{J}\right) \]