Chemical Effects of Electric Current Quiz

An electric current can produce

• heating effect only

• chemical effect only

• magnetic effect only

• chemical, heating, and magnetic effects

Boojho and Paheli performed experiments taking similar bulbs and cells but two different solutions A and B as shown in Fig.14.1. They found 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

• the current flowing through the circuits in the two setups cannot be compared in this manner

Boojho’s uncle has set up an electroplating factory near his village. He 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 chemical effect of current

• the heating effect of current

• the magnetic effect of current

• the lightning 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

• aluminium

Which of the following solutions will not make the bulb in Fig 14.2 glow?

• sodium chlorides

• copper sulphate

• silver nitrate

• sugar solution in diluted water

Fill in the blanks

Why is a layer of zinc coated over iron?

Will the solution of sugar in distilled water conduct electricity?