Chemical Effects of Electric Current

What is a conduction tester?

• A device used to determine whether a substance is a good or poor conductor of electricity

• A device used to measure the resistance of a substance

• A device used to generate electricity

• A device used to store electricity

Which of the following is a good conductor of electricity?

• Wood

• Plastic

• Copper

• Glass

Which of the following is a poor conductor of electricity?

• Tap water

• Salt solution

• Distilled water

• Hydrochloric acid

What is the chemical effect of electric current?

• Formation of gas bubbles at the electrodes

• Deposit of metal on the electrodes

• Change in color of the solution

• All of the above

What happens during the electrolysis of water?

• Water splits up into hydrogen and oxygen

• Water turns into steam

• Water freezes into ice

• Water evaporates

What is electroplating?

• The process of depositing a layer of any desired metal on another material by means of electricity

• The process of converting electricity into metal

• The process of removing metal from an object

• The process of heating metal to a high temperature

Which metal is commonly used for electroplating bicycle parts, car parts, taps, and gas burners?

• Copper

• Gold

• Chromium

• Silver

Why are tin cans used for storing food electroplated with tin over iron?

• To make the cans shiny

• To make the cans stronger

• To protect the iron from corrosion

• To make the cans lighter

Why are iron objects coated with zinc?

• To make the objects shiny

• To make the objects stronger

• To protect the objects from corrosion

• To make the objects lighter