CBSE Class 8 Science Chapter 11 Chemical Effects Of Electric Very Short Answer Type Questions
Question 1. Will the solution of sugar in distilled water conduct electricity?
Answer: The sugar solution in distilled water will make it a good conductor of electricity, and current can easily pass through it.
Question 2. The fresh fruits and vegetables conduct electricity to some extent. Explain why
Answer: Due to the presence of various salt solutions in fruits and vegetables, they can conduct electricity to some extent.
” Electroplating Process Class 8 “
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Question 3. State, which one is a better conductor of electricity, sea water or drinking water?
Answer: As sea water contains more salt, which increases conductivity. So, sea water is a good conductor of electricity.
” Cbse Class 8 Science Chapter 11 Vsaqs “
Question 4. Mention any one important difference in the conduction of electricity by solids over liquids.
Answer: Since, no chemical changes takes place when electricity is allowed to pass through the solids while in liquids chemical changes take place when electricity is passed through it.
Question 5. Name the effect of the current responsible for the glow of the bulb in an electric circuit.
Answer: The heating effect of electric current is responsible for the bulb to glow in an electric circuit.
Question 6. A chemical compound is produced by the method of electrolysis. Give an example.
Answer: Solution hydroxide or caustic soda is produced by the electrolysis of an aqueous solution (water solution) of sodium chloride.
Question 7. Mention the planner who should oversee the electroplating.
Answer: The waste of electrolysers should be disposed of far away from residential areas
” Chemical Effects Of Electric Current Class 8 “
” Conductivity Of Liquids Class 8 “
Question 8. Why is tin electroplated on iron to make cans used for
Answer: Electroplating is done on the iron to prevent it from rusting and corrosion. By electroplating the iron with tin, the food does not come into contact with iron directly, so it is protected from getting spoiled.
Question 9. During the electrolysis of water, at which electrode is hydrogen gas evolved?
Answer: During the electrolysis of water, hydrogen gas is evolved at the cathode.
Question 10. Explain why a layer of zinc is coated over Iron?
Answer: A Layer of zinc is coated over iron because zinc prevents it from rusting and corrosion.