MCQ Questions for Class 8 Science Chapter 14 Chemical Effects of Electric Current with Answers

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All questions answers in the last paragraph

Q1. Which of the following is a good conductor of electricity:

(A) istilled water
(B) tap water
(C) kerosene
(D) none of these

Q2. Polythene is

(A) a conductor
(B) an insulator
(C) both (A) and (B)
(D) none of these

Q3. Which of the following is a good conductor?

(A) Brick
(B) Steel
(C) Plastic
(D) Cotton

Q4. When current flows through a conducting solution than the electrode connected to the negati’wc terminal of the battery is called :

(A) anode
(B) cathode
(C) rod
(D) none of these

Q5. LED glows:

(A) when a strong electric current flows through it
(B) whenever a weak electric current flows through it
(C) when no electric current flows through it
(D) none of these

Q6. Electroplating is based on

(A) heating effect of electricity
(B) chemical effect of electricity
(C) physical effect of electricity
(D) magnetic effect of electricity

Q7. Pure or distilled water is a

(A) poor conductor
(B) good conductor
(C) both (A) and (B)
(D) none of these

Q8. Current is the flow of:

(A) electrons
(B) protons
(C) neutrons
(D) none of these

Q9. Magnetic compass connected In a circuit is used to check:

(A) magnetism in electric current
(B) slow current
(C) small current
(D) none of these

Q10. Copper is

(A) a good conductor
(B) an insulator
(C) both (A) and (B)
(D) none of these

Q11. An electric current can produce

(A) heating effect
(B) chemical effect
(C) magnetic effect
(D) all of these

Q12. A battery is used to:

(A) convert chemical current into electric
(B) maintain a potential difference current
(C) measure the current
(D) measure the temperature

Q13. Kerosene is:

(A) electrolyte
(B) non-electrolyte
(C) electrode
(D) none of these

Q14. Waste from an electroplating factory must be disposed off

(A) in the nearby river
(B) in the nearby pond
(C) in the nearby cornfield
(D) according to the disposal guidelines of Waste Management Bodies

Q15. An electrolyte is

(A) a metal
(B) a liquid that conducts current
(C) a non-metal
(D) none of these

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