Chemical effects of electric current 1

1.An electric current can produce

• heating effect only.

• chemical effect only.

• magnetic effect only.

• chemical, heating, and magnetic effects.

When an 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

Small amount of a mineral salt present naturally in water makes it a______________ of electricity.

• insulator

• conductor

• both a and b

• none of these

Flow of electron is called

• Electroplating

• Electric current

• Electrodes

• Electrolyte

conductors can allow electricity because of the presence of

• free ions

• free electrons

• free protons

• atoms

Adding common salt to distilled water makes it

• Good Conductor

• Poor Conductor

• No change

• Both A and B

Sugar solution is a good conductor of electricity.

• True

• False

Tags

NGSS.MS-PS2-3

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 of the following liquid is not a good conductor of electricity?

• Orange juice
• Tap water
• Vinegar
• Honey