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JEE Advanced Chemistry Structure of Atom 2019 JEE Advanced 2019 (Paper 2)

JEE Advanced Chemistry Question (2019) — Solution

Question

Consider the Bohr's model of a one-electron atom where the electron moves around the nucleus. In the following List-I contains some quantities for the n t h orbit of the atom and List-II contains options showing how they depend on n .   List - I List - II (I) Radius of the n t h orbit P ∝ n - 2 (II) Angular momentum of the electron in the n t h orbit Q ∝ n - 1 (III) Kinetic energy of the electron in the n t h orbit R ∝ n 0 (IV) Potential energy of the electron in the n t h orbit S ∝ n 1   T ∝ n 2   U ∝ n 1 / 2 Which of the following options has the correct combination considering List-I and List-II?

Options

  1. A. I I I , S
  2. B. I V , Q
  3. C. I V , U
  4. D. I I I , P

Answer

D. I I I , P

Step-by-step solution

According to Bohr’s atomic model: Radius of orbit ∝ n 2 Angular Momentum ∝ n Kinetic energy ∝ 1 n 2 Potential energy ∝ - 1 n 2

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Related: Chemistry — Structure of Atom · All PYQ Banks