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Question

Which of the following relation is untrue based on Bohr's model of the atom?

A
Velocity of electron 1n
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B
Frequency of revolution 1n3
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C
Radius of orbit n2Z
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D
Energy of an electron in nthorbit Z2
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Solution

The correct option is C Radius of orbit n2Z
According to Bohr's theory,
r=r0(n2Z)
So, the radius is directly proportional to square of n and inversely proportional to atomic number Z. Similarly, velocity is proportional to Zn. Frequency is proportional to Z2n3 and energy of an electron in nth orbit is Z2n2.

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