CHEMISTRY REVISION

An electric current can produce

• heating effect only.

• chemical effect only.

• magnetic effect only.

• chemical, heating, and magnetic effects.

Tags

NGSS.HS-PS2-5

Which one of the following solutions will not conduct electricity?

• lemon juice

• vinegar

• tap water

• vegetable oil

Tags

NGSS.MS-PS2-3

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

• iron

• aluminium

• copper

• chromium

Which of the following statements is incorrect about the conductivity of water?

• Rain water is a good conductor of electricity.
• On addition of table salt, water conducts electricity.
• On addition of lemon juice, water conducts electricity.
• Water becomes a good conductor of electricity when heated.

An electrolyte is

• a metal

• a solution

• a liquid that conducts electricity

• none of these

Tags

NGSS.HS-PS2-5

Flow of electrons is called

• Electrode

• Electrolyte

• Electric current

• Electroplating

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

• Gold

• Chromium

• Tin

• Zinc

Tags

NGSS.HS-PS2-6

A cation has ___________ charge.

Light emitting diodes (LED) glow even when a ___________ electric current flows through it.

Change in colour is an example of the ___________ effect of current.