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

Q8(c). Beta decay products

Question

What are x and y in the following nuclear reactions? Justify their formation. ¹¹₆C → ¹¹₅B+x; ¹⁴₆C → ¹⁴₇N+y.

Answer in brief

x is a positron (β⁺) and y an electron (β⁻); a neutrino or antineutrino also accompanies the decay.

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

CoversBeta decay productsNuclear equations

All parts of Question 8