Which of the following statement is incorrect in Bohr’s model if the mass of an electron becomes 10 times its original mass ?

Expression of velocity is, $\mathrm{v}=\frac{2{\mathrm{\pi ze}}^2}{\mathrm{nh}}$. As velocity of electron is independent from mass of electron, hence option 1 is wrong.

Expression of radius is, $\mathrm{r}=\frac{{\mathrm{n}}^2{\mathrm{h}}^2}{4{\mathrm{\pi }}^2{\mathrm{mZe}}^2}$. If mass increased by 10 times, radius decreases by 10 times. hence, option-2 is correct.

Expression of energy is, $\mathrm{E}=\frac{-2{\mathrm{\pi }}^2{\mathrm{mZ}}^2{\mathrm{e}}^4}{{\mathrm{n}}^2{\mathrm{h}}^2}$. If mass increases by 10 times, then energy also increases by 10 times. Hence, option-3 is also correct.

Expression of wavelength is, $\mathrm{\lambda }=\frac{2{\mathrm{\pi r}}_{\mathrm{n}}}{\mathrm{n}}$.No dependency on mass, therefore wavelength remains the same. Hence, option-4 is also correct.