VKC ScienceChemistry for written exams Telegram

UPSC Combined Geo-Scientist

Chemist

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

Mains Paper I covers inorganic chemistry.

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

Q3(b). Born–Haber cycle

Question

Draw the Born-Haber Cycle for the formation of NaCl crystal and write the two important uses of the Cycle.

Answer in brief

Hess' s law relates the formation enthalpy to sublimation, bond dissociation, ionisation, electron attachment and lattice formation.

Part of VKC Basic

Read the key points and the full model answer with VKC Basic

VKC Basic (₹999 for 6 months) opens every solved answer, the notes, the handbook and the daily answer archive. Every Mains test series includes it.

See what is included Already a member? Sign in

The full model answer

As written for the answer booklet: the diagram carries the working, the lines stay short. Read here only; it is not offered as a download.

The handwritten model answer pages open with the VKC plan.
Read the whole 2018 solution2018 question paper

CoversBorn–Haber cycleLattice enthalpy

All parts of Question 3