Chemical Effects of Electric Current — Class 8 MCQs with Answers
Class 8 CBSE Science · Chapter 111
Pre-2026 syllabusThis chapter is from the older NCERT book. See the 2026-27 Class 8 Science chapters →
72 practice questions · 24 Easy · 24 Medium · 24 Hard · Updated
Jump to the 6 solved questions
Practise the most important Class 8 CBSE Science questions from Chapter 111, "Chemical Effects of Electric Current". You get 6 timed quizzes made from 72 NCERT-based MCQs, with answers and explanations. The questions are split into 24 Easy, 24 Medium and 24 Hard. Warm up on the basics, then move on to the exam-level questions that top scorers in CBSE Board exams get right.
To score well in "Chemical Effects of Electric Current", focus on clear concepts in physics, chemistry and biology basics. Each MCQ here is timed and uses exam-style marking (+4 correct, −1 wrong, 0 skipped). This helps you stay accurate when time is short, just as real papers need. Every question has a short explanation, so a wrong answer becomes a quick lesson. It is the fastest way to fix gaps before a test.
Use this chapter for focused revision. Start with the Easy set to check your basics on Chemical Effects of Electric Current, then move to Medium and Hard to practise applying them. Your accuracy, streaks and XP save automatically. This chapter also adds to your overall Class 8 Science mastery score. Try the 6 sample questions below: tap an option to see the answer and a worked explanation. Sign in free to start practising.
Chemical Effects of Electric Current — important questions & MCQs with answers (Class 8 Science)
6 solved questions from this chapter's difficulty levels, each with its answer and explanation. Tap an option to check yourself.
0 of 6 answered
- Q1 of 6Easy
Liquids that allow electric current to pass through them are called:
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Answer: Good conductors
Explanation: Liquids that allow current to flow are good conductors of electricity.
- Q2 of 6Easy
A device often used to test whether a liquid conducts electricity is a:
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Answer: Tester with an LED or bulb
Explanation: A tester with an LED or bulb glows when current passes, showing the liquid conducts.
- Q3 of 6Medium
Passing current through acidified water produces gas bubbles. This is an example of:
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Answer: The chemical effect of electric current
Explanation: Producing gases by passing current through a solution is a chemical effect of the current.
- Q4 of 6Medium
In electroplating, the object to be plated is connected so that the coating metal is deposited on it. The process relies on the:
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Answer: Chemical effect of electric current
Explanation: Electroplating deposits metal using the chemical effect of the current in a solution.
- Q5 of 6Hard
A bridge made of iron is given a zinc coating. Years later, scratches expose the iron but it still resists rust better than bare iron. The BEST reason is that:
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Answer: The zinc coating protects the iron from moisture and air, slowing rusting
Explanation: The zinc layer shields the iron from the air and moisture that cause rust.
- Q6 of 6Hard
Assertion (A): Distilled water is a poor conductor, but salt water conducts well. Reason (R): Dissolved salt provides ions that carry the current. Choose the correct option.
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Answer: Both A and R are true and R explains A
Explanation: Salt water conducts because of its ions, which pure water lacks — R explains A.
Chemical Effects of Electric Current notes: key concepts (Class 8 Science)
This chapter covers how electric current produces chemical effects — conduction in liquids, electrolysis and electroplating.
- Conduction in liquids
- Liquids that conduct electricity (e.g. salt/acid solutions) are good conductors; distilled water is a poor conductor.
- Testing conduction
- A tester (LED/bulb) shows whether a liquid conducts; current causes the bulb to glow.
- Chemical effects
- Passing current through a conducting solution can cause gas bubbles, deposits on electrodes, or colour changes.
- Electrolysis
- Chemical decomposition of a solution by electric current at the electrodes.
- Electroplating
- Depositing a layer of one metal on another using electric current, e.g. chromium plating to prevent rust and improve looks.
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Chemical Effects of Electric Current — FAQs
What are the key concepts in Class 8 Science Chemical Effects of Electric Current?+
This chapter covers how electric current produces chemical effects — conduction in liquids, electrolysis and electroplating. Key ideas include Conduction in liquids, Testing conduction, Chemical effects, Electrolysis, Electroplating.
What does Class 8 Science Chapter 111 (Chemical Effects of Electric Current) cover on XamBaaz?+
It has 72 NCERT-based MCQs on "Chemical Effects of Electric Current": 24 Easy, 24 Medium and 24 Hard. Together they make 6 timed quizzes, and you never get the same set twice. Every question has an instant explanation. They help you prepare for CBSE Board exams.
Are these "Chemical Effects of Electric Current" questions free to practise?+
Yes. Sign in with Google to practise "Chemical Effects of Electric Current" free. Full unlimited access is ₹999/year. One year from the day you pay. You stay in Class 8 till 31 March; on 1 April your account moves up to Class 9 and the rest of your year carries over. No chapter is charged separately.
How should I revise "Chemical Effects of Electric Current" for the exam?+
Start with the Easy quiz to check your basics, then try Medium and Hard to practise applying them. There are 6 timed quizzes on this chapter, so you can come back for a fresh set instead of one you have seen. Read each explanation, retry the questions you miss, and track your accuracy until it stays high.
Are these "Chemical Effects of Electric Current" MCQs available with answers?+
Yes. 6 sample questions are on this page with answers: tap an option, or "Show answer", to see the correct option and a step-by-step explanation. Sign in free with Google to start practising, with instant scoring.
Is there negative marking in the "Chemical Effects of Electric Current" quizzes?+
Yes. The timed quizzes use exam-style marking: +4 for a right answer, −1 for a wrong one and 0 for a skip. MHT-CET and CBSE board papers have no negative marking. Our mocks for those are scored their way.
What are the important questions from Chemical Effects of Electric Current (Class 8 Science)?+
The questions that matter most test Conduction in liquids, Testing conduction, Chemical effects, Electrolysis, Electroplating. This page shows 6 solved important MCQs with answers and explanations. Sign in to practise all 72 questions on the chapter as timed quizzes.
Is there an online quiz for Chemical Effects of Electric Current?+
Yes — Class 8 Science Chemical Effects of Electric Current has timed online quizzes at Easy, Medium and Hard levels, with instant scoring and a worked explanation on every question. The first quiz on the chapter is free.
Are there question answers and extra questions for Chemical Effects of Electric Current (Class 8 Science)?+
Yes. This page has 6 solved questions on Chemical Effects of Electric Current, each with the correct answer and a short explanation. Sign in to practise all 72 questions on the chapter as timed quizzes.