Given below are two statements:
Statement I: Rutherford's gold foil experiment cannot explain the line spectrum of hydrogen atom.
Statement II: Bohr's model of hydrogen atom contradicts Heisenberg's uncertainty principle.
In the light of the above statements, choose the most appropriate answer from the options given below:
Statement I: Rutherford's gold foil experiment cannot explain the line spectrum of hydrogen atom.
Statement II: Bohr's model of hydrogen atom contradicts Heisenberg's uncertainty principle.
In the light of the above statements, choose the most appropriate answer from the options given below:
- (A)Statement I is true but Statement II is false.
- (B)Both Statement I and Statement II are false.
- (C)Both Statement I and Statement II are true.✓ Correct
- (D)Statement I is false but Statement II is true.
Answer: (C)
Solution
Statement I is true: Rutherford's atomic model describes the nuclear structure but cannot explain the discrete line spectrum of hydrogen. The line spectrum is explained by Bohr's atomic model with quantized energy levels.
Statement II is also true: Bohr's model assumes electrons move in fixed orbits with definite positions and velocities, which contradicts Heisenberg's uncertainty principle stating that both position and momentum cannot be simultaneously determined with precision.
Therefore, both statements are true.
Statement II is also true: Bohr's model assumes electrons move in fixed orbits with definite positions and velocities, which contradicts Heisenberg's uncertainty principle stating that both position and momentum cannot be simultaneously determined with precision.
Therefore, both statements are true.
JEE Main · 2021 · 27 Jul 2021 · Shift 1 · Single correct option