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ChemistryMediumNumerical2024 · 31 Jan Shift 1

Q52.The ionization energy of sodium in kJ mol – 1 . If electromagnetic radiation of wavelength 242 nm is just sufficient to ionize sodium atom is ______.(nearest integer)

What This Question Tests

This question tests the application of the photoelectric effect principle to calculate ionization energy from a given wavelength of electromagnetic radiation.

Concepts Tested

Ionization energyPhotoelectric effectPlanck's equationWavelength-energy relation

Formulas Used

E = hc/λ

1 eV = 1.602 x 10^-19 J

1 kJ/mol = (1 J/atom) * (N_A / 1000)

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📋 Question Details

Chapter: Atomic Structure
Topic: Photoelectric effect and ionization energy
Year: 2024
Shift: 31 Jan Shift 1
Q Number: Q52
Type: Numerical
NCERT Ref: Class 11 Chemistry Ch 2: Atomic Structure

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