JEE Main 2021 — Structure Of Atom Question with Solution
From: JEE Main 2021 (Online) 24th February Evening Shift
Question
According to Bohr's atomic theory :
(A) Kinetic energy of electron is .
(B) The product of velocity (v) of electron and principal quantum number (n), .
(C) Frequency of revolution of electron in an orbit is .
(D) Coulombic force of attraction on the electron is .
Choose the most appropriate answer from the options given below :
(A) Kinetic energy of electron is .
(B) The product of velocity (v) of electron and principal quantum number (n), .
(C) Frequency of revolution of electron in an orbit is .
(D) Coulombic force of attraction on the electron is .
Choose the most appropriate answer from the options given below :
Choose an option
Show full solutionCorrect option: D
Correct answer
D(A) and (D) only
Step-by-step explanation
According to Bohr's theory,
I. or
( Correct)
II. Speed of electron
(Here, Z = atomic number, n = number of shells)
( Incorrect)
III. Frequency of revolution of electron
Frequency ( ) ( Incorrect)
I. or
( Correct)
II. Speed of electron
(Here, Z = atomic number, n = number of shells)
( Incorrect)
III. Frequency of revolution of electron
Frequency ( ) ( Incorrect)
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This is a previous-year question from JEE Main 2021, 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.