Physics
Grade-7
Easy
Question
Which of the following is correct?
- Pure water forms ions to conduct electricity.
- A liquid conducts electricity because of the presence of ions.
- Water can be used for extinguishing fires caused due to electrical faults.
- Carbon is a non-metal, so it cannot be used in an electrolytic cell.
Hint:
The electrolytes have charged ions that conduct electricity.
The correct answer is: A liquid conducts electricity because of the presence of ions.
- Electrolytes are liquids that are used to conduct electricity.
- Electrolytes have ions that carry charges.
- These charges are used to carry electrons.
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