We have completed the NCERT/CBSE chapter-wise Multiple Choice Questions for Class 8 Science book Chapter 14 Chemical Effects of Electric Current with Answers by expert subject teacher for latest syllabus and examination. You can Prepare effectively for the exam taking the help of the Class 8 Science Objective Questions PDF free of cost from here. Students can take a free test of the Multiple Choice Questions of Chemical Effects of Electric Current. Each Questions has four options followed by the right answer. Download the Science Quiz Questions with Answers for Class 8 free Pdf and prepare to exam and help students understand the concept very well.
MCQ Questions for Class 8 Science with Answers
Q1. Kerosene is:
(i) electrolyte
(ii) non-electrolyte
(iii) electrode
(iv) none of these
(i) electrolyte
Q2. Which of the following does not conduct electricity?
(i) Sugar solution
(ii) Vinegar solution
(iii) Lemon juice solution
(iv) Caustic soda solution
(i) Sugar solution
Q3. An electric lamp glows due to
(i) Chemical effect
(ii) Magnetic effect
(iii) Heating effect
(iv) None
(iii) Heating effect
Q4. Why do we add little dilute sulphuric acid to copper sulphate solution during electroplating?
(i) To increase acidity
(ii) To increase conductivity
(iii) So that the colour becomes more prominent
(iv) To burn copper sulphate
(ii) To increase conductivity
Q5. In electrolytic solutions, which of the following acts as carrier of charge?
(i) Protons
(ii) Electrons
(iii) Neutrons
(iv) Ions
(iv) Ions
Q6. Which of the following is a good conductor of electricity:
(i) istilled water
(ii) tap water
(iii) kerosene
(iv) none of these
(ii) tap water
Q7. Which of the following is a good conductor?
(i) Brick
(ii) Steel
(iii) Plastic
(iv) Cotton
(ii) Steel
Q8. Potential difference is created in a electric circuit due to
(i) Switch
(ii) Cell or battery
(iii) Voltmeter
(iv) Conductor
(ii) Cell or battery
Q9. Electroplating is based on
(i) heating effect of electricity
(ii) chemical effect of electricity
(iii) physical effect of electricity
(iv) magnetic effect of electricity
(ii) chemical effect of electricity
Q10. The process of depositing a layer of any desired metal on another material by means of electricity is called _.
(i) Electric plating
(ii) Electroplating
(iii) Electric depositing
(iv) None of the above
(ii) Electroplating
Q11. Electroplating is done
(i) To protect the metals against corrosion
(ii) To give shiny appearance to articles
(iii) To repair the worn out materials
(iv) All of the above
(iv) All of the above
Q12. A battery is used to:
(i) convert chemical current into electric
(ii) maintain a potential difference current
(iii) measure the current
(iv) measure the temperature
(i) convert chemical current into electric
Q13. Waste from an electroplating factory must be disposed off
(i) in the nearby river
(ii) in the nearby pond
(iii) in the nearby cornfield
(iv) according to the disposal guidelines of Waste Management Bodies
(iv) according to the disposal guidelines of Waste Management Bodies
Q14. Which of the appliances at your home does not run on electric current?
(i) Television
(ii) Mixer grinder
(iii) Air conditioner
(iv) Gas burner
(iv) Gas burner
Q15. Flow of electron is called
(i) electrolyte
(ii) electroplating
(iii) electrodes
(iv) electric current
(iv) electric current
Q16. Copper wire is a
(i) Good conductor
(ii) Poor conductor
(iii) Good conductor and poor conductor
(iv) None of the options
(i) Good conductor
Q17. What is the principle involved in the glowing of an electric bulb?
(i) Magnetic effect of current
(ii) Heating effect of current
(iii) Chemical effect
(iv) Conduction of current
(ii) Heating effect of current
Q18. Car parts, bath taps, kitchen gas burners, bicycle handlebars arc electroplated with:
(i) chromium
(ii) zinc
(iii) tin
(iv) none of these
(i) chromium
Q19. An electrolyte is
(i) a metal
(ii) a liquid that conducts current
(iii) a non-metal
(iv) none of these
(ii) a liquid that conducts current
Q20. A device which prevents or allow the current to flow through it
(i) Conductor
(ii) Motor
(iii) Terminal
(iv) Switch
(iv) Switch
Q21. Electroplating prevents
(i) corrosion
(ii) passing of current
(iii) dissociation
(iv) shining
(i) corrosion
Q22. A sheet of pure copper is used as
(i) cathode
(ii) anode
(iii) positrode
(iv) negatrode
(i) cathode
Q23. Which of the following is the electrolyte in a dry cell?
(i) Copper sulphate
(ii) Zinc sulphate
(iii) Sulphuric acid
(iv) Ammonium chloride
(iv) Ammonium chloride
Q24. Electroplating is a process which is:
(i) magnetic effect of electricity
(ii) heating effect of electricity
(iii) chemical effect off electricity
(iv) none of these
(iii) chemical effect off electricity
Q25. Which is not a non-electrolyte?
(i) Ethyl alcohol
(ii) Sodium chloride
(iii) Urea
(iv) Sodium solution
(ii) Sodium chloride
Q26. Which categories of substance are generally good conductors?
(i) Insulator
(ii) Non-metals
(iii) Metals
(iv) Reflector
(iii) Metals
Q27. Tap water is a good conductor of electricity while distilled water is not because
(i) Tap water contain salts
(ii) Distilled water do not contain salt
(iii) Only (i) is correct
(iv) Both (i) & (ii) is correct
(ii) Distilled water do not contain salt
Q28. The substance which is conductor of electricity is:
(i) rubber
(ii) paper
(iii) nails
(iv) plastic
(iii) nails
Q29. What is the common name for manganese-dioxide-alkaline-zinc cell?
(i) Moz cell
(ii) Long life cell
(iii) Manganese-dioxide
(iv) Alkaline cell
(iv) Alkaline cell
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