NIOS 355 — Electroplating
This is a complete, free study companion for NIOS 355 — Electroplating — built around what the exam actually asks. The topics examiners repeat most are Principle of electroplating with anode, cathode and electrolyte, Faraday's laws and calculation of deposited mass, and Current density and its effect on deposit quality. The syllabus runs to 6 chapters. Below you'll find the full topic-frequency ranking, the exam paper pattern, every chapter, a step-by-step study plan, and the official downloads — everything in one place.
Everything here is free. We're an independent student resource, not the official NIOS body, so always confirm the current syllabus and exam dates on the official NIOS website before you rely on them.
Key information
- Subject code
- 355
- Level
- Class 12
- Programme
- CL12
- Exam
- On-Demand Examination System
- Conducted by
- National Institute of Open Schooling (NIOS)
Most important topics (by past-paper frequency)
| # | Topic | Times asked | Likelihood |
|---|---|---|---|
| 1 | Principle of electroplating with anode, cathode and electrolyte | 3 | 60% |
| 2 | Faraday's laws and calculation of deposited mass | 3 | 60% |
| 3 | Current density and its effect on deposit quality | 3 | 60% |
| 4 | Copper plating bath and copper coating uses | 3 | 60% |
| 5 | Nickel plating bath, properties and applications | 3 | 60% |
| 6 | Chromium plating bath, decorative chromium and hard chromium | 3 | 60% |
| 7 | Electroplating on plastics: cleaning, etching, activation and electroless plating | 3 | 60% |
| 8 | Safety precautions in electroplating workshop | 3 | 60% |
| 9 | Components of electroplating bath and electrolyte functions | 3 | 60% |
| 10 | Metal surface preparation before electroplating | 3 | 60% |
| 11 | Chemical cleaning: solvent, alkaline, electrolytic and ultrasonic cleaning | 3 | 60% |
| 12 | Mechanical cleaning: polishing, brushing and buffing | 3 | 60% |
Based on how often each topic appeared in official previous-year question papers.
What you will study (chapters)
- Chapter 1
- Principles of Electroplating
- Chapter 2
- Substrates and Coatings
- Chapter 3
- Safety and Environmental Considerations
- Chapter 4
- Electrolytes and Bath Preparation
- Chapter 5
- Process Parameters and Process Control
- Chapter 6
- Quality Assurance, Troubleshooting, and Waste Management
How to study NIOS 355 — Electroplating and score well
- Start with the highest-frequency topics — In NIOS 355 — Electroplating, Principle of electroplating with anode, cathode and electrolyte, Faraday's laws and calculation of deposited mass, Current density and its effect on deposit quality, and Copper plating bath and copper coating uses appear again and again in past papers. Master these first — they return the most marks for the time you put in.
- Practise with previous-year papers — Solve the last 5–10 years of NIOS NIOS 355 — Electroplating papers under timed, exam-like conditions. Past papers show exactly which topics repeat and how questions are worded.
- Revise actively, not passively — Write a one-page summary for each of the 6 chapters — key definitions, formulas and the points examiners reward — then re-test yourself instead of re-reading.
- Mark your answers with the official scheme — After each practice paper, score yourself against the official marking scheme. It shows how marks are awarded step-by-step, so you learn to present answers the way examiners expect.
Exam tips: how to score higher in NIOS 355 — Electroplating
Where students lose marks: rushing the high-weightage questions, skipping the steps the marking scheme rewards, and saving easy sections for last. Read the whole paper first, attempt your strongest section early to bank marks, and always show your working.
Manage your time: split your time in proportion to the marks each section carries, keep a few minutes at the end to check, and never leave a question blank — a partial, structured answer still earns partial marks.
Frequently asked questions
What are the most important topics in NIOS 355 — Electroplating?
Based on past papers, the most frequently asked topics include Principle of electroplating with anode, cathode and electrolyte, Faraday's laws and calculation of deposited mass, Current density and its effect on deposit quality. The full ranked list with how often each appears is in the "Most important topics" section above.
Where can I download NIOS 355 — Electroplating previous-year question papers?
Official NIOS previous-year question papers are available on the official NIOS website. Open the Question Papers section for the direct link, plus the exam pattern and the topics that repeat most.
How can I prepare for NIOS 355 — Electroplating faster?
Start with the highest-frequency topics, learn the exam pattern so you know how each section is marked, and practise with past papers. A subject-aware study tutor can quiz you on exactly these topics.
A Gyani AI tutor trained on the NIOS 355 — Electroplating syllabus and past papers can quiz you on the most-asked topics and show you exactly what to revise.