| ⇦ | 
| ⇨ |
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: - As a light wave travels from one medium to another which of its following properties
- A body of mass m is placed on the earth’s surface. It is taken from the earth’s surface
- A polished metal plate has a rough and black-spot. It is heated to 1400 K
- A block of mass m1 rests on a horizontal table. A light string connected
- A uniform force of (3i + j) newton acfs on a particle of mass 2kg
Topics: Atoms and Nuclei
(136)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- As a light wave travels from one medium to another which of its following properties
- A body of mass m is placed on the earth’s surface. It is taken from the earth’s surface
- A polished metal plate has a rough and black-spot. It is heated to 1400 K
- A block of mass m1 rests on a horizontal table. A light string connected
- A uniform force of (3i + j) newton acfs on a particle of mass 2kg
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