Grade 8 Quiz: Chemical Effects of Electric Current

Which of the following does not conduct electricity?

• Sugar solution

• Vinegar solution

• Lemon juice solution

• Caustic soda solution

Electroplating is based on ___________of an electric current.

• Physical effect

• Chemical effect

• Heating effect

• Magnetic effect

Adding common salt to distilled water makes it

• Good Conductor

• Poor Conductor

• No change

• Both A and B

An electrolyte is

• a metal

• a solution

• a liquid that conducts electricity

• none of these

Flow of electrons is called

• Electrode

• Electrolyte

• Electric current

• Electroplating

Electroplating prevents

• electric current

• chemical effect

• lightening

• rusting

Which of these is plated on the iron to prevent it from chemically reacting with food?

• Gold

• Chromium

• Tin

• Zinc

Out of the following, which metal is used to electroplate iron to make it shining and rust resistant?

• Gold

• Chromium

• Zinc

• Tin

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 corn field

• according to the disposal guidelines of the local authority.

• in the nearby pond

Which one of the following solutions will not conduct electricity?

• lemon juice

• vinegar

• tap water

• vegetable oil