VKC ScienceChemistry for written exams Telegram

UPSC Combined Geo-Scientist

Chemist

  • 2 objective papers
  • 120 questions each
  • 2 h per paper
  • 100 + 300 marks

Prelims Paper II covers chemistry.

UPSC Combined Geo-Scientist, Prelims · 2026 · Paper II, Chemistry · Q39 of 120

Geo-Scientist Prelims 2026 Chemistry Q39: A sharp end point is NOT achieved during titration of boric acid…

QuestionAnalytical chemistry / boric acid titration

A sharp end point is NOT achieved during titration of boric acid against NaOH. The sharp end point can be observed

  1. (a) By addition of suitable Lewis acid to the solution
  2. (b) By using diphenylamine sulphonic acid as indicator
  3. (c) By addition of suitable organic polyhydroxy compounds
  4. (d) By using xylenol-orange as indicator

Part of VKC Basic

Read the answer and its explanation 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

Take this paper offlineAll 120 questions with answers and explanations in one PDF.
Download PDFJoin Telegram