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Question

Choose the correct alternative from the following.

A
Bohr's theory accurately explains the spectral lines present due to a magnetic field.
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B
Bohr's theory was applicable to all size atoms.
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C
Bohr's theory was able to explain Heisenberg uncertainty principle properly.
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D
It violates the Heisenberg Uncertainty Principle
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Solution

The correct option is D It violates the Heisenberg Uncertainty Principle
It violates the Heisenberg Uncertainty Principle. The Bohr atomic model theory considers electrons to have both a known radius and orbit i.e. position and momentum are known at the same time, which is impossible according to Heisenberg principle. Even it failed to explain the Zeeman effect i.e. the spectral line is split into several components in the presence of a magnetic field.
The Bohr atomic model theory made correct predictions for smaller sized atoms like hydrogen, but poor spectral predictions are obtained when larger atoms are considered.

Therefore, option (D) is correct.

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