Chemical Effects of Electric Current

Which of the following does not conduct electricity?

• Sugar solution

•  Vinegar solution

• Lemon juice solution

• Caustic soda solution

An electric current can produce

• heating effect

• chemical effect

• magnetic effect

• all of the above

Tags

NGSS.MS-PS1-2

NGSS.MS-PS3-3

Pure or distilled water is a

• poor conductor

• good conductor

• Both

• None of the above

Why do we add little dilute sulphuric acid to copper sulphate solution during electroplating?

• To increase acidity

•  To increase conductivity

• So that the colour becomes more prominent

•  To burn copper sulphate

Which of the following is a bad conductor of electricity?

•  Distilled water

• Silver nitrate

•  Sulphuric acid

• Copper sulphate

Electroplating is based on ___________of an electric current.

• Physical effect

• Chemical effect

• Heating effect

• Magnetic effect

Tags

NGSS.MS-PS1-2

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

• Gold

• Chromium

• Tin

• Zinc

Electroplating prevents

• electric current

• chemical effect

• lightening

• rusting

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

• Gold

• Chromium

• Zinc

• Tin

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.

Tags

NGSS.MS-PS2-3