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UPSC Combined Geo-Scientist

Chemist

  • 3 descriptive papers
  • 200 marks each
  • 3 h per paper

Mains Paper II covers physical chemistry.

UPSC Combined Geo-Scientist, Mains · 2018 · Mains Paper II

Q7. Minimum momentum uncertainty of an electron in a 3 nm molecule

Question

The Heisenberg uncertainty principle can be written as Δx·Δpₓ ≥ h/4π. For a particle trapped in a one-dimensional box of length L, the maximum value of Δx is L. Calculate the minimum value of Δpₓ for an electron trapped in a linear molecule of length L = 3.0 nm and clearly state the units.

Model answer

The free solution for 2018 answers questions 1, 2, 3, 4, 5, 6, 8, 12, 13 and 15, the ones picked in its time plan. This part is not answered on the site yet. New answers are announced on Telegram.

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CoversHeisenberg uncertainty principleparticle in a boxmomentum uncertaintyΔx Δp ≥ h/4π