This quiz works best with JavaScript enabled. Home > Class 8 > Class 8 Science Chapter 14 Chemical Effects Of Electric Current ā Quiz 1 š Homepage š Download PDF Books š Premium PDF Books Class 8 Science Chapter 14 Chemical Effects Of Electric Current Quiz 1 (23 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. The article to be electroplated is made A) The anode. B) The cathode. C) Either anode or cathode. D) None of these. Show Answer Correct Answer: B) The cathode. 2. Electric current is the flow of particles with A) A negative charge. B) A positive charge. C) Both positive and negative charges flowing opposite to each other. D) Either positive or negative charge depending on the material. Show Answer Correct Answer: D) Either positive or negative charge depending on the material. 3. When electric current is passed through a conducting solution, there is a change of colour of the solution. This indicates A) The chemical effect of current. B) The heating effect of current. C) The magnetic effect of current. D) The lightning effect of current. Show Answer Correct Answer: A) The chemical effect of current. 4. In a voltaic cell, the Zinc rod is connected to the Anode. A) False. B) True. C) All the above. D) None of the above. Show Answer Correct Answer: A) False. 5. Electrons move easily in A) Insulators. B) Conductors. C) Capacitors. D) None of the above. Show Answer Correct Answer: B) Conductors. 6. The phenomenon was discovered in the year A) 1857. B) 1845. C) 1831. D) None. Show Answer Correct Answer: C) 1831. 7. Which of the following is a good electrical conductor A) Graphite. B) Silicon. C) Phosphorus. D) Carbon. Show Answer Correct Answer: A) Graphite. 8. Which of the following is responsible for the flow of current through a metallic conductor? A) Valence electrons. B) Lone pair of electrons. C) Free electrons. D) None of the above. Show Answer Correct Answer: C) Free electrons. 9. An electrolyte is a compound which in its molten or aqueous state conducts an electric current by decomposing the current. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 10. Electric current can produce A) Heating effect of current. B) Magnetic effect. C) Chemical effect. D) All of these. Show Answer Correct Answer: D) All of these. 11. A/ An ..... is used to provide electricity to the bulb in a torch. A) Electric switch. B) Electric motor. C) Electric cell. D) Screw driver. Show Answer Correct Answer: C) Electric cell. 12. Which Of The Following Is Not An Application Of The Chemical Effect Of Electric Current? A) Electroplating of metals. B) Purification of metals. C) Decomposition of elements. D) Decomposition of compounds. Show Answer Correct Answer: C) Decomposition of elements. 13. Generators convert A) Mechanical energy to chemical energy. B) Mechanical energy to light energy. C) Mechanical energy to electrical energy. D) Mechanical energy to heat energy. Show Answer Correct Answer: C) Mechanical energy to electrical energy. 14. If Plus Sign (+) Denotes The Positive Electrode And Minus Sign (-) Denotes The Negative Electrode, Then Which Of The Following Statement Is Correct For An Iron Spoon To Be Copper Plated? A) Iron spoon (+), copper plate (-), Iron sulphate electrolyte. B) Iron spoon (-), copper plate (+), Iron sulphate electrolyte. C) Copper plate (-), Iron spoon (+), Copper sulphate electrolyte. D) Copper plate (+), Iron spoon (-), Copper sulphate electrolyte. E) None of them. Show Answer Correct Answer: D) Copper plate (+), Iron spoon (-), Copper sulphate electrolyte. 15. In 1800, a British chemist ..... had shown that if electrodes were immersed in water and a current was passed bubbles of oxygen and hydrogen were produced. A) William Shakesphere. B) William Nicholoson. C) William Dornet. D) William nike. Show Answer Correct Answer: B) William Nicholoson. 16. What is the full form for CFL A) Combustible fluoride lamp. B) Compact fluoride lamp. C) Combustible fluorescent lamp. D) Compact fluorescent lamp. Show Answer Correct Answer: D) Compact fluorescent lamp. 17. The metal rods or plates through which the current enters or leaves the conducting solution are called A) Electrodes. B) Electrolytes. C) Ions. D) Conductors. Show Answer Correct Answer: A) Electrodes. 18. The liquids that conduct electricity are solutions of acids, bases and salts in water A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 19. Electrolysis is used in refining of ..... metals A) Pure. B) Non. C) Impure. D) Liquid. Show Answer Correct Answer: C) Impure. 20. For Electroplating An Iron Object With Copper Metal Or Copper Plating, The method that we should not follow is? A) The iron object is made negative electrode. B) The copper plate is made positive electrode. C) Iron sulphate solution is taken as electrolyte. D) Copper sulphate solution is taken as electrolyte. Show Answer Correct Answer: C) Iron sulphate solution is taken as electrolyte. 21. The lower part of a bulb is called ..... A) Metal. B) Apex. C) Base. D) Armature. Show Answer Correct Answer: C) Base. 22. Which of the following is another name for Cathode A) Negative Terminal. B) Positive Terminal. C) All the above. D) None of the above. Show Answer Correct Answer: A) Negative Terminal. 23. In an LED, the longer lead is attached to the ..... terminal of the battery. A) Positive. B) Negative. C) Any one of these. D) Need not be attached to the battery. Show Answer Correct Answer: A) Positive. 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