JEE Main 2019 Chemistry question on Atomic Structure

1. A.
   The electron can be found at a distance $2a_0$ from the nucleus.
2. B.
   The magnitude of the potential energy is double that of its kinetic energy on an average.
3. C.
   The probability density of finding the electron is maximum at the nucleus.
4. D.
   The total energy of the electron is maximum when it is at a distance $a_0$ from the nucleus.

[JEE Main 2019 · 9 Apr · Shift II]