UPSC Combined Geo-Scientist, Mains · 2023 · Mains Paper I

Q11(c). Balancing missing nuclear particles

5 marks
Topic: Nuclear chemistry
Question only

Question

Write ‘X’ in the following equations: (i) ²⁴₁₂Mg + X → ²⁷₁₄Si + ¹₀n (ii) ¹⁴₇N + X → ¹²₆C + ³₁H (iii) ⁹₄Be + X → ¹²₆C + ¹₀n (iv) ⁷₃Li + X → ⁸₄B + γ (v) ²⁷₁₃Al + X → ²⁴₁₁Na + ⁴₂He

Model answer

The free solution for 2023 answers questions 1, 3, 4, 7, 8 and 10, the ones picked in its time plan. Question 11 is answered in full in the Geo-Scientist Chemistry Paper I, 2021 to 2025 book, with every part of every paper.

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Printed copy and Kindle

UPSC Combined Geo-Scientist (Main) Chemistry Paper I: Model Answers 2021 to 2025

All eleven questions of each paper, with the question printed above its answer
Titration, gravimetric and nuclear numericals worked with units; structures drawn
Topic-wise weightage and a topic-wise index

Printed copy Kindle edition Read sample pages

Topic notes: nuclear chemistry: radioactive decay, binding energy, radiocarbon dating and the GM counter, with every Civil Services, IFoS and Geo-Scientist PYQ →

Coversnuclear reactionsbalancing nuclear equationsconservation of mass numberalpha particleneutron

All parts of Question 11

11(a) Packing fraction and binding energy of iron-5615 marks
11(b) Radiocarbon age of a wood sample10 marks
11(c) Balancing missing nuclear particles5 marks