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Saturday, 31 October

JEE Main 2021 · ChemistryMultiple choiceTwo statementsMediumConceptual

JEE Main 26 August 2021, Shift 1, Chemistry Q32

Question 32 of 90 in this shift, Chemistry question 2 of 30, Section A.

Given below are two statements : Statement I : According to Bohr's model of an atom, qualitatively the magnitude of velocity of electron increases with decrease in positive charges on the nucleus as there is no strong hold on the electron by the nucleus. Statement II : According to Bohr's model of an atom, qualitatively the magnitude of velocity of electron increases with decrease in principal quantum number. In the light of the above statements, choose the most appropriate answer from the options given below :
  1. (1)Both Statement I and Statement II are true
  2. (2)Both Statement I and Statement II are false
  3. (3)Statement I is true but Statement II is false
  4. (4)Statement I is false but Statement II is trueOfficial answer

Official answer

Option 4

NTA final key.

Chapter
Structure of Atom
Topic
Bohr's Atomic Theory
Idea tested
Electron Velocity in Orbit

Same idea in other shifts

Asked 2× in all
  1. 5 Apr 2024, Shift 1 · Q81The value of Rydberg constant (RH\mathrm{R_H}) is 2.18×10−182.18 \times 10^{-18} J. The velocity of electron having mass 9.1×10−319.1 \times 10^{-31} kg…MediumNumerical value

Question text from the official JEE Main paper published by NTA; answer from the final answer key. Chapter, topic and idea tags, difficulty and skill are Lumi’s. Lumi analyses 108 of the 174 JEE Main shifts held from 2017 to 2026.