UPSC Civil Services · IFoS · Geo-Scientist
Chemistry for exams you answer in writing.
Year-wise solved papers for the UPSC Chemistry optional, built around labelled diagrams and short lines of reasoning. Books, a checked test series and video courses follow.
Why is the rate of hydrolysis of tert-butyl bromide independent of the concentration of the nucleophile?
Rate = k[(CH₃)₃C–Br], so first order, unimolecular.
Nucleophile attacks after the slow step, so [Nu] is absent from the rate law.
Planar R⁺ is attacked from both faces: racemisation.
What is on offer
Solved papers
Latest year freeChemistry optional, Paper I and Paper II, year by year. The latest year is a free download.
Short notes
PlannedOne revision note per syllabus topic. One note is free and the rest are paid.
Books
Releasing soonOne volume per paper, with syllabus, topic-wise weightage and index.
Test series
PlannedWrite a full paper by hand and get your copy back checked.
Notice board
Your mentor
- Integrated M.Sc. Chemistry, IIT Roorkee
- CSIR NET Chemical Sciences, All India Rank 4
- Wrote UPSC Mains with Chemistry optional
- Teaching chemistry since 2019
From the blog
What students say
Exams covered
Common questions
Hear about each new solution first
New solutions and notes are announced on Telegram first. Video solutions go on YouTube, and short revision posts on Instagram.
Previous year questions
Solved papers
Pick an exam. The latest year is free to download. Earlier years are paid, one paper at a time.
Notes
Topic-wise short notes
One short note for each syllabus topic, written for revision. One note is free to download and the rest are paid.
Store
Books, notes and courses
Everything sold here is written and checked by VKC.
Online payment opens at launch. Until then, each release is announced on the Telegram channel.
How buying works
- PayThe Buy button opens a secure payment page. UPI, cards and net banking are accepted.
- ReceiveA PDF book or note arrives by email. For a course or test series you get a join link to a private Telegram channel.
- AccessYour join request is approved within 24 hours. Lectures, papers and notes are posted inside that channel.
Coming later
Recommended books
These are Amazon links. A purchase through them pays this site a small commission at no extra cost to you.
Test series
Answer writing, checked by hand
In a written exam the marks come from how the answer is laid out. Each test here is a full paper in the exam pattern, and every copy comes back with marks and comments.
- EnrolPay once for the series and join the private Telegram channel for your batch.
- Get the paperThe question paper is posted in the channel on the scheduled date.
- Write and sendWrite it by hand in exam time, scan your copy into one PDF and send it in.
- Get it back checkedYour copy returns with marks and comments on each answer, along with a model solution.
What gets checked
Whether the diagram does the work it should, whether the mechanism or derivation is complete, whether key terms are stated and underlined, and whether the answer fits the marks and the space.
When it opens
The schedule and fee are not announced yet. The announcement goes on Telegram first.
Blog
Notes on writing chemistry answers
Short pieces on the paper pattern, answer layout and how to use the clock.
About
Your mentor
VKC has taught chemistry for competitive exams since 2019, across physical, organic and inorganic. He has also written these papers himself, and the solutions follow what an answer booklet has room for: a labelled diagram first, then short lines of reasoning.
- Integrated M.Sc. ChemistryIIT Roorkee
- CSIR NET, Chemical SciencesAll India Rank 4, 2019
- UPSC Civil Services MainsWritten with Chemistry as the optional subject
- UPSC Combined Geo-ScientistReached the interview stage three times
Contact
For questions about a solution, an order or the test series, write to:
Policies
Terms, privacy, refunds and delivery
Draft wording. The highlighted items need to be filled in, and the text should be reviewed before payments go live.
Terms of use
- This site is run by legal name, city, state, India.
- Material on this site is for your personal study. Paid PDFs, videos and test papers may not be shared, resold or re-uploaded. Access is withdrawn without refund if they are.
- Question papers are the property of the Union Public Service Commission. The solutions and notes are original work.
- This site is not affiliated with UPSC or any government body, and it makes no promise of marks or selection.
- These terms are governed by Indian law, with jurisdiction at city.
Privacy
- At purchase we collect your name, email, phone number and Telegram username. A postal address is collected only for printed books.
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- To have your details removed, write to the contact email.
Refunds and cancellation
- PDF books, notes and video courses: no refund once access has been delivered.
- Test series: full refund if requested before the first test is released, and none after that.
- A duplicate or failed payment is refunded to the original payment method within 7 working days.
- Printed books: a damaged or misprinted copy is replaced if reported with a photo within 7 days of delivery.
Delivery
- PDF books and notes are sent to your email right after payment, and within 24 hours at the latest.
- Courses and test series are delivered in a private Telegram channel. Join requests are approved within 24 hours.
- Printed books are shipped within India in number working days.