⇦ | ⇨ |
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: - A nucleus of mass number 220, initially at rest, emits an α-particle. If the Q-value
- The first line in Lyman series has wavelength λ. The wavelength
- The temperature of ideal gas is reduced from 927° C to 27° C. The r.m.s velocity
- Energy of photon whose frequency is 10¹² MHz will be
- If ₉₂U²³⁸ undergoes successively 8 ∝-decays and 6 β-decays, the resulting nucleus is
Topics: Atoms and Nuclei
(136)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- A nucleus of mass number 220, initially at rest, emits an α-particle. If the Q-value
- The first line in Lyman series has wavelength λ. The wavelength
- The temperature of ideal gas is reduced from 927° C to 27° C. The r.m.s velocity
- Energy of photon whose frequency is 10¹² MHz will be
- If ₉₂U²³⁸ undergoes successively 8 ∝-decays and 6 β-decays, the resulting nucleus is
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