MCQ
Which type of the overlap of orbitals involves in hyperconjugation ?
- A$\pi - \pi $
- ✓$\sigma - \pi $
- C$\sigma - \sigma $
- D$p-p$
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

$\Delta E = - 2.0 \times {10^{ - 18}}\,J\left( {\frac{1}{{n_2^2}} - \frac{1}{{n_1^2}}} \right)$
the wavelength of the light that must be absorbed to excite hydrogen electron from level $n\, = 1$ to level $n\, = 2$ will be: $(h\, = 6.625\times10^{-34}\, J\,s,\, C\, = 3\times10^8\, m\,s^{-1})$