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The wavelength of Kα line in copper is 1.5Å. The ionisation energy of K electron in copper is
Options
(a) 11.2×10⁻¹⁷ J
(b) 12.9×10⁻¹⁶ J
(c) 1.7×10⁻¹⁵ J
(d) 10×10⁻¹⁶ J
Correct Answer:
12.9×10⁻¹⁶ J
Explanation:
Required ionization energy, E = hc / λ
E = 6.6 × 10⁻³⁴ × 3 × 10⁸ / 1.5 × 10⁻¹°
= 12.9 × 10⁻¹⁶ J
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Subject: Physics
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Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- At 0⁰C, 15 gm of ice melts to form water at 0⁰C. The change in entropy is
- A body of mass 2 kg is kept by pressing to a vertical wall by a force of 100 N
- In L-C-R series circuit, an alternating emf e and current i are given by the equations
- If in a L-R series circuit the power factor is 1/2 and R=100Ω, then the value of L is,
- When 1 kg of ice at 0⁰C melts to water at 0⁰C, the resulting change in its entropy
Topics: Atoms and Nuclei (136)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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