Standard Books Chemistry Bohr's Model MCQ Question with Solution

If speed of electron in ground state energy level is 2.2 × 10⁶ m s⁻¹, then its speed in third excited state will be

A

6.8 × 10⁶ m s⁻¹

B

8.8 × 10⁵ m s⁻¹

C

5.5 × 10⁵ m s⁻¹

D

5.5 × 10⁶ m s⁻¹

Option C

According to Bohr's model, v ∝ 1/n. Here, vₐ = 2.2 × 10⁶ m s⁻¹; nₐ = 1, n₈ = 4. Thus, v₈ = vₐ × (1/4) = 0.55 × 10⁶ = 5.5 × 10⁵ m s⁻¹.

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STANDARD Chemistry Bohr's Model MCQ Question