JEE PYQ: Atomic Structure Question 10
Question 10 - 2021 (24 Feb Shift 2)
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 $\propto \frac{Z^2}{n^3}$ (D) Coulombic force of attraction on the electron is $\propto \frac{Z^3}{n^4}$
(1). ((C) only)
(2). ((A) and (D) only)
(3). ((A) only)
(4). ((A), (C) and (D) only)
Show Answer
Answer: (2)
Solution
(A) $KE \propto Z^2/n^2$ – correct. (B) $Vn \propto Z$, not $Z^2$ – incorrect. (D) Force $\propto Z^3/n^4$ – correct.
BETA
