VKC ScienceChemistry for written exams Telegram

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

Q6(b). Pipette histogram and Gaussian

Question

For 50 pipette measurements, successive bin counts are 3, 1, 7, 9, 13, 7, 5, 4, 1 (percentages 6, 2, 14, 18, 26, 14, 10, 8, 2). Plot a histogram and compare with a Gaussian of the same mean and standard deviation.

Answer in brief

The distribution is approximately bell-shaped, with its largest bin containing 26% of the observations.

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 2016 solution2016 question paper

CoversPipette histogramGaussianStatistics

All parts of Question 6