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

Q6(a)(i). Coprecipitation and postprecipitation

10 marks
Topic: Gravimetric analysis
Question only

Question

Explain co-precipitation and post-precipitation with suitable examples.

Model answer

The free solution for 2023 answers questions 1, 3, 4, 7, 8 and 10, the ones picked in its time plan. Question 6 is answered in full in the Geo-Scientist Chemistry Paper I, 2021 to 2025 book, with every part of every paper.

Read the 2023 solution

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

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: gravimetric analysis, solubility product and organic precipitants, with every Civil Services, IFoS and Geo-Scientist PYQ →

Coverscoprecipitationpostprecipitationgravimetric analysisprecipitate impuritiesocclusion

All parts of Question 6

6(a)(i) Coprecipitation and postprecipitation10 marks
6(a)(ii) Oxine and aluminium oxinate5 marks
6(b) Nickel gravimetry with dimethylglyoxime15 marks