The energy required by electrons, present in the first Bohr orbit of hydrogen atom to be excited to second Bohr orbit is ________ J mol –1. Given : RH = 2.18 × 10 –11 ergs. (A) 1.635 × 10 –18 (B) 9.83

Question

The energy required by electrons, present in the first Bohr orbit of hydrogen atom to be excited to second Bohr orbit is ________ J mol –1. Given : RH = 2.18 × 10 –11 ergs.

(A) 1.635 × 10 –18
(B) 9.835 × 10
(C) 9.835 × 10
(D) 1.635 × 10 –11

Prashant Kotian · Accepted Answer

Correct answer: B. n H Z E R n   7 2 1 E 2.18 10 1 2               = 1.635 × 10 –18 Joule/atom = 1.635 × 10 –18 × 6.02 × 10 23 Joule/mole = 9.835 × 10 5 Joule/mole

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