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UPSC Combined Geo-Scientist

Chemist

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

Mains Paper III covers analytical and organic chemistry.

UPSC Combined Geo-Scientist, Mains · 2016 · Mains Paper III

Q3(b). Radiation and absorbance

Question

Complete: doubling (i) frequency, (ii) wavelength, (iii) wavenumber changes photon energy how? (iv) Find absorbance at 10% transmittance. (v) Effect of doubling path length?

Answer in brief

(i) Double; (ii) halve; (iii) double; (iv) 1; (v) double, under Beer–Lambert conditions.

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CoversRadiationabsorbanceSpectroscopy

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