Chemical Effects of Current

An electric current can produce

• heating effect only

• chemical, heating, and magnetic effects.

• magnetic effect only

• chemical effect only

You perform an experiment taking similar bulbs and cells but two different solutions A and B. You find that the bulb in the setup A glows more brightly as compared to that of the setup B. You would conclude that

• higher current is flowing through the circuit in setup A

• higher current is flowing through the circuit in setup B

• equal current is flowing through both the circuits

• No conclusion

You have set up an electroplating factory near your village.

You should dispose off the waste of the factory

• in the nearby river

• in the nearby pond

• in the nearby cornfield

• according to the disposal guidelines of the local authority

When electric current is passed through a conducting solution, there is a change of colour of the solution. This indicates

• the lightning effect of current

• the magnetic effect of current

• the heating effect of current

• the chemical effect of current

Which one of the following solutions will not conduct electricity?

• lemon juice

• vinegar

• tap water

• vegetable oil

Which of the following metals is used in electroplating to make objects appear shining?

• iron

• copper

• chromium

• aluminum

The conductors among the following are

• Hydrochloric acid

• Sugar solution

• Vinegar

• Salt water

Zinc is coated onto iron to

• Give shiny surface

• Prevent rusting

• Make iron cheap

• All of these

Which of the following is a good conductor?

• Plastic

• Brick

• Graphite

• Cotton

Which of the following cannot work as tester for electric circuits

• Bulb

• LED

• Magnetic Compass

• Battery