If an electron is moving in the nth orbit of the Hydrogen atom, then its velocity vn for the nth orbit is given as:

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vn∝1n

vn∝n2

vn∝1n2

vn∝n

answer is A.

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Detailed Solution

In Bohr’s postulates mvr=nh2πAnd radius of Bohr orbit r ∝ n2Thus, velocity of electron v ∝ 1n, where n is orbit number

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