JEE Main 2013 — Structure Of Atom Question with Solution
From: JEE Main 2013 (Offline)
Question
Energy of an electron is given by . Wavelength of light required to excite an
electron in an hydrogen atom from level n = 1 to n = 2 will be
(h = 6.62 × 10−34 Js and c = 3.0 × 108 ms−1)
(h = 6.62 × 10−34 Js and c = 3.0 × 108 ms−1)
Choose an option
Show full solutionCorrect option: D
Correct answer
D1.214 × 10−7 m
Step-by-step explanation
Given =
=
Electron in an hydrogen atom exited from level n = 1 to n = 2. So n2 = 2 and n1 = 1.
And for H, Z = 1
= 1.6335 10-18 J
We know =
= 1.6335 10-18
then
=
Electron in an hydrogen atom exited from level n = 1 to n = 2. So n2 = 2 and n1 = 1.
And for H, Z = 1
= 1.6335 10-18 J
We know =
= 1.6335 10-18
then
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This is a previous-year question from JEE Main 2013, covering the Structure Of Atom chapter of Chemistry. PrepSharp catalogues every PYQ from JEE Main with a verified answer key and step-by-step solution prepared by IIT alumni — so you can search by chapter, topic or year and revise efficiently.