Question

Assertion (A) : In Bohr model of hydrogen atom, the energy levels are discrete and quantised. Reason (R) : In a hydrogen atom, the electrostatic force on the electron provides the necessary centripetal force to it to revolve around the nucleus.

• A. Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of the Assertion (A).
• B. Both Assertion (A) and Reason (R) are true, but Reason (R) is not the correct explanation of the Assertion (A).
• C. Assertion (A) is true, but Reason (R) is false.
• D. Both Assertion (A) and Reason (R) are false.

Hint:

In Bohr's model: \[ \text{Electrostatic force} \rightarrow \text{Centripetal force} \] but \[ \text{Quantised energy levels} \rightarrow mvr=\frac{nh}{2\pi}. \] Do not confuse these two independent conditions.

Answer 1

The Correct Option is B