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The radius of the second Bohr orbit for hydrogen atom is – (Planck's Const. h = 6.6262 × 10 –34 Js; mass of electron = 9.1091 × 10 –31 kg; charge of electron e = 1.60210 ×10 –19 C; permittivity of vaccum ∈ 0 = 8.854185 ×10 –12 kg –1 m –3 A 2 )

1. 0.529 Å
2. 2.12 Å
3. 1.65 Å
4. 7.76 Å Students may find similar question in CP exercise sheet : [ JEE Main, Chapter : Atomic Structure, Exercise-1, Q. No.14 ] [ JEE Advance, Chapter : Atomic Structure, Exercise-1, Q. No.21 ]

Correct answer: 2.12 Å

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