Chemical Effects of Electric Current – MCQs Online Practice Test with Automatic scoring
CBSE Class 8 Science – Chapter Wise Study Materials Based on NCERT
Chapter 14: Chemical Effects of Electric Current – 30 MCQ Timed Quiz
Suitable for:
Annual Examination • Periodic Tests • Class Tests • Pre-Board / School Level Board Exam Pattern
These MCQs are designed strictly as per the NCERT syllabus, making them ideal for CBSE Class 8 board exams standard.
This is a 30-question, 30-minute timed quiz on
Chapter 14: Chemical Effects of Electric Current with automatic scoring and detailed per-question feedback.
Click “Start Quiz” to begin the timer and attempt the questions.
Timed MCQ Quiz – Chapter 14: Chemical Effects of Electric Current
Topic 1 – Conductors, Insulators & Conducting Liquids (Q1 – Q5)
Q1. A substance that allows electric current to pass through it easily is called a:
Q2. Which one of the following is the best conductor of electricity?
Q3. Distilled water is a very poor conductor of electricity because it:
Q4. Tap water conducts electricity mainly because it has:
Q5. Which of the following liquids is least likely to conduct electricity?
Topic 2 – Testing Conductivity: LED, Bulb & Magnetic Effect (Q6 – Q10)
Q6. In a simple circuit used to test liquids, which indicator is most suitable to detect a weak current?
Q7. A student dips two clean electrodes in lemon juice, connects them to a battery and a small bulb, but the bulb does not glow. The correct conclusion is that lemon juice:
Q8. The deflection of a compass needle kept near a coil in a liquid-testing circuit shows that the:
Q9. In a conductivity test, the electrodes should be:
Q10. Why are electrodes cleaned before using them in experiments on liquids?
Topic 3 – Chemical Effects of Electric Current & Key Terms (Q11 – Q15)
Q11. Chemical changes produced in a conducting liquid due to electric current are called:
Q12. The conducting liquid in an electrolytic cell is known as the:
Q13. The electrode connected to the positive terminal of the battery is called the:
Q14. In a conducting solution, electric current is mainly carried by:
Q15. Electrolysis means:
Topic 4 – Copper Sulphate Activity & Electrolysis (Q16 – Q20)
Q16. In the copper sulphate experiment with two copper electrodes, the electrode connected to the negative terminal:
Q17. In a copper sulphate solution, the blue colour is mainly due to the presence of:
Q18. In the copper sulphate experiment with copper electrodes, the colour of the solution remains almost the same because:
Q19. When iron is used as the cathode in copper sulphate solution, a reddish-brown layer forms on iron because:
Q20. During electrolysis of acidified water, bubbles at the cathode are mainly of:
Topic 5 – Electroplating: Principle & Uses (Q21 – Q25)
Q21. Electroplating is the process of:
Q22. In electroplating, the object to be electroplated is always connected as the:
Q23. For copper electroplating of an iron key, a suitable electrolyte is:
Q24. Which of the following is a correct use of electroplating?
Q25. The main advantage of electroplating steel spoons with silver is that the spoons:
Topic 6 – Safety, Higher-Order & Mixed Applications (Q26 – Q30)
Q26. Why should electrical switches not be touched with wet hands?
Q27. School experiments on chemical effects of current use cells or small batteries instead of mains electricity mainly because:
Q28. In which of the following situations is the chemical effect of electric current clearly seen?
Q29. The study of chemical effects of electric current helps us understand and use processes like:
Q30. During an experiment, gas bubbles and metal deposition are seen in a solution when current passes. This shows that the: