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JEE Main202126 Aug 2021Morning ShiftChemistryStructure of AtomActual

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 principle quantum number.

Options

  1. AStatement I is false but Statement II is true
  2. BStatement I is true but Statement II is false
  3. CBoth Statement I and Statement II are false
  4. DBoth Statement I and Statement II are true

Correct answer

A. Statement I is false but Statement II is true

Step-by-step solution

According to Bohr's model, velocity of electron is given by V n = 2 . 18 × 10 6 × Z n m / sec As we see from the given formula velocity is inversely proportional to principle quantum number. V n ∝ 1 n ; n ↑ , V n ↓ the magnitude of velocity of electron is independent of positive charges on the nucleus.

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