Chemistry-(general)
NEET Chemistry (general) MCQ Question
Type: MCQ-numerical-Easy-Class 11
According to the de Broglie equation, what is the wavelength of an electron with a kinetic energy of 2.0 × 10^−25 J and mass 9.1 × 10^−31 kg?
A
6.63 × 10^−10 m
B
9.87 × 10^−10 m
C
4.87 × 10^−10 m
D
8.97 × 10^−10 m
Correct Answer
Option D
Detailed Explanation
Using the de Broglie equation, λ = h / mv, where h is Planck's constant and mv is momentum. Solving for λ with given K.E. and mass, we find the wavelength is 8.97 × 10^−10 m.
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