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Q.

Radius of the first Bohr's orbit of hydrogen atom is

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a

$0.53 Å$

b

$0.22 Å$

c

$0.28 Å$

d

$1.06 Å$

answer is D.

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Detailed Solution

Bohr's radius of the hydrogen atom

$r = \frac{n^{2} \times 0 .529 Å}{z}$ : where $z =$ Atomic number.

$n =$ Number of orbit.

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