Class 8 Science — Chapter 11: Chemical Effects of Electric Current
72 practice questions · 24 Easy · 24 Medium · 24 Hard
Practise Class 8 Science Chapter 11, "Chemical Effects of Electric Current", with 72 NCERT-aligned multiple-choice questions. The set is split into 24 Easy, 24 Medium and 24 Hard questions, so you can warm up on the fundamentals and then push into the exam-level problems that separate top scorers in CBSE Board exams.
"Chemical Effects of Electric Current" is one of the chapters where concept clarity across physics, chemistry and biology basics really pays off. Each MCQ on this chapter is timed and uses exam-grade marking (+2 correct, −1 wrong, 0 skipped), training the same accuracy-under-pressure that real papers demand. Every question carries a short explanation, so a wrong answer becomes a quick lesson rather than a dead end — the fastest way to close gaps before a test.
Use this chapter as targeted revision: attempt the Easy set first to confirm your basics on Chemical Effects of Electric Current, then move to Medium and Hard to test application and problem-solving. Your accuracy, streaks and XP save automatically, and the chapter feeds into your overall Class 8 Science mastery score. A few sample questions are shown below; sign in free to practise all 72.
Key concepts: Chemical Effects of Electric Current (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.
💡 Exam tips for Chemical Effects of Electric Current
- Distilled (pure) water does not conduct; dissolving salt/acid adds ions that carry the current.
- Electroplating is used to make objects shiny, prevent corrosion, and save costly metals.
Sample questions
Which of these liquids conducts electricity?
Salt solution conducts electricity because it contains charged particles (ions).
A tester bulb does not glow in a liquid, but the LED tester does. This tells us the liquid is:
An LED responds to weak currents, so the liquid conducts a little even when the bulb stays dark.
When current passes through acidified water, gas collects at both electrodes, but more at one than the other. The gases are mainly:
The current splits water into hydrogen and oxygen, with more hydrogen — a chemical effect.
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 11 (Chemical Effects of Electric Current) cover on XamBaaz?+
It covers 72 NCERT-aligned MCQs on "Chemical Effects of Electric Current" — 24 Easy, 24 Medium and 24 Hard — each with a timed quiz and an instant explanation, suitable 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 (limited-time launch price), with no per-chapter charges.
How should I revise "Chemical Effects of Electric Current" for the exam?+
Start with the Easy quiz to confirm your fundamentals, then attempt Medium and Hard for application-level practice. Review each explanation, retry the questions you miss, and track your accuracy on this chapter until it is consistently high.
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