| ⇦ | 
| ⇨ |
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
Related Questions: - Figure below shows two paths that may be taken by a gas to go from a state A
- The temperature at which the vapour pressure of a liquid becomes equal to the external
- The approximate depth of an ocean is 2700 m. The compressibility of water is
- The wavelength of light emitted from second orbit to first orbit in a hydrogen atom is
- The angle of incidence at which reflected light is totally polarised for refraction
Topics: Atoms and Nuclei
(136)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- Figure below shows two paths that may be taken by a gas to go from a state A
- The temperature at which the vapour pressure of a liquid becomes equal to the external
- The approximate depth of an ocean is 2700 m. The compressibility of water is
- The wavelength of light emitted from second orbit to first orbit in a hydrogen atom is
- The angle of incidence at which reflected light is totally polarised for refraction
Topics: Atoms and Nuclei (136)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
18000+ students are using NEETLab to improve their score. What about you?
Solve Previous Year MCQs, Mock Tests, Topicwise Practice Tests, Identify Weak Topics, Formula Flash cards and much more is available in NEETLab Android App to improve your NEET score.
Share this page with your friends
Leave a Reply