UPSC Combined Geo-Scientist, Mains · 2021 · Mains Paper II
Q13(a). pH of a solution with the hydrogen electrode
Question
How is the pH of a solution determined using hydrogen electrode?
Model answer
The free solution for 2021 answers questions 1, 2, 3, 4, 6, 7, 10, 12, 14 and 15, the ones picked in its time plan. Question 13 is answered in full in the Geo-Scientist Chemistry Paper II, 2021 to 2025 book, with every part of every paper.
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.
Printed copy and Kindle
UPSC Combined Geo-Scientist (Main) Chemistry Paper II: Model Answers 2021 to 2025
- All fifteen questions of each paper, with the question printed above its answer
- Numericals worked from formula to result with units; graphs with labelled axes
- Topic-wise weightage and a topic-wise index
Covershydrogen electrodepH measurementNernst equationcalomel electrodeemf
All parts of Question 13
- 13(a) pH of a solution with the hydrogen electrode10 marks
- 13(b) Photochemical decomposition of hydrogen iodide10 marks