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 · 2023 · Paper II, Chemistry · Q61 of 120

Geo-Scientist Prelims 2023 Chemistry Q61: Two components A and B have their pure vapour pressure in the ratio…

QuestionSolutions / Raoult’s law

Two components A and B have their pure vapour pressure in the ratio 1 : 6 and respective mole fractions in the solution in the ratio 1 : 4. The mole fraction of the component B in the vapour phase will be :

  1. (a) 0·14
  2. (b) 0·25
  3. (c) 0·56
  4. (d) 0·96

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

Topic notes: solutions: Raoult’s and Henry’s laws, non-ideal solutions, colligative properties, the van ’t Hoff factor and activity, with every Civil Services, IFoS and Geo-Scientist PYQ →

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