NEET Physics: Quantum Mechanics questions with solutions

Q1. The angular momentum of an electron in an orbit is quantized because it is a necessary condition for the compatibility with

1. Wave nature of electron
2. Particle nature of electron
3. Pauli's exclusion behaviour
4. None of these

Answer: Wave nature of electron

Quantized angular momentum follows from the requirement that the electron’s de Broglie wave must form a stable standing wave in the orbit. This compatibility condition selects only discrete allowed orbits, so the wave nature of the electron is the reason.