UPSC Combined Geo-Scientist, Mains · 2025 · Mains Paper I

Q2(c). Synthesis of YBa₂Cu₃O₇

5 marks
Topic: Inorganic solids
Question only

Question

How will you synthesize YBa₂Cu₃O₇ quaternary oxide? Explain with chemical reaction.

Model answer

The free solution for 2025 answers questions 1, 3, 4, 6, 9 and 10, the ones picked in its time plan. Question 2 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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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: inorganic solids: perovskite, spinel, ReO₃, corundum, high-Tc superconductors and solid-state synthesis, with every Civil Services, IFoS and Geo-Scientist PYQ →

CoversYBa2Cu3O7YBCOhigh-temperature superconductorceramic methodsolid-state synthesis

All parts of Question 2

2(a) Local ion displacement in BaTiO₃; electrical behaviour15 marks
2(b) Structures of non-stoichiometric hydrides and oxides10 marks
2(c) Synthesis of YBa₂Cu₃O₇5 marks