CUET · PHYSICS · PYQ PAPER 2023
Choose the correct statements from the following:
A. The minimum energy required to free the electron from the ground state of the hydrogen atom is 13.6 J
B. The principle quantum number n labels the stationary states in the ascending order of energy
C. Bohr gave the basic idea of discrete energy levels
D. de Broglie hypothesis provided an explanation for Bohr's second postulate for the quantization of angular momentum of the orbiting electron
E. line spectrum provides useful information about the atomic structure.
Choose the correct answer from the options given below:
- A A, C, D and E only
- B A, B and D only
- C B, C, D and E only
- D A and E only
Answer & Solution
Correct Answer
(C) B, C, D and E only
Step-by-step Solution
Detailed explanation
A. The ionization energy of hydrogen from ground state is \( 13.6 \text{ eV} \approx 2.179 \times 10^{-18} \text{ J} \). \( 13.6 \text{ J} \) is incorrect. B. For hydrogen, energy \( E_n = - \frac{13.6 \text{ eV}}{n^2} \). As \( n \) increases, \( E_n \) increases (becomes less…
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