Q34.The energy required to break one mole of Cl −Cl bonds in Cl2 is 242 kJ mol−1 . The longest wavelength of light capable of breaking a single Cl −Cl bond is (c = 3 × 108 ms−1 and NA = 6.02 × 1023 mol−1) (1) 594 nm (2) 640 nm (3) 700 nm (4) 494 nm
What This Question Tests
This question combines the concepts of bond dissociation energy and the energy of a photon, requiring calculations involving Avogadro's number, Planck's constant, and the speed of light to find the maximum wavelength.
Concepts Tested
Formulas Used
E = hc/λ
E_mole = N_A * E_single
📚 NCERT Sections This Tests
12.5 — A Hydrogen Atom Initially In The Ground Level Absorbs A Photon,
Physics Class 12 · Chapter 12
12.5 A hydrogen atom initially in the ground level absorbs a photon, which excites it to the n = 4 level. Determine the wavelength and frequency of photon.
12.3 — A Difference Of 2.3 Ev Separates Two Energy Levels In An Atom. What
Physics Class 12 · Chapter 12
12.3 A difference of 2.3 eV separates two energy levels in an atom. What is the frequency of radiation emitted when the atom make a transition from the upper level to the lower level?
11.4 — Monochromatic Light Of Wavelength 632.8 Nm Is Produced By A
Physics Class 12 · Chapter 11
11.4 Monochromatic light of wavelength 632.8 nm is produced by a helium-neon laser. The power emitted is 9.42 mW. (a) Find the energy and momentum of each photon in the light beam, (b) How many photons per second, on the average, arrive at a target irradiated by this beam? (Assume the beam to have uniform cross-section which is less than the target area), and (c) How fast does a hydrogen atom have to travel in order to have the same momentum as that of the photon?
📋 Question Details
- Chapter
- Atomic Structure
- Topic
- Photoelectric effect, Bond dissociation energy
- Year
- 2010
- Shift
- Unknown
- Q Number
- Q34
- Type
- MCQ
- NCERT Ref
- Class 11 Chemistry Ch 2: Atomic Structure
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