Question:
The correct match between Item - I (starting material) and Item - II (reagent) for the preparation of benzaldehyde is :
Correct Option:
Solution:
According to Bohr's atomic theory :
(A) Kinetic energy of electron is $\propto \frac{Z^{2}}{n^{2}}$
(B) The product of velocity (v) of electron and principal quantum number (n). 'vn' $\propto Z^{2} .$
(C) Frequency of revolution of electron in an orbit is $\propto \frac{Z^{3}}{n^{3}}$.
(D) Coulombic force of attraction on the electron is $\propto \frac{Z^{3}}{n^{4}}$. Choose the most appropriate answer from the options given below:
(1) (C) only
(2) $(\mathrm{A})$ and $(\mathrm{D})$ only
(3) (A) only
(4) $(\mathrm{A}),(\mathrm{C})$ and $(\mathrm{D})$ only