Question

Which of the following is a correct statement?

• A. All liquid conduct electricity
• B. Aluminum is an insulator
• C. All solids conduct electricity
• D. Sea water is a good conductor of electricity

Answer 1

The correct option is D

Sea water is a good conductor of electricity

Correct option is D: Sea water is a good conductor of electricity

Explanation for correct option:

1. The finest conductor of electricity is seawater.
2. There are many salts dissolved in it.
3. These are all electrolytes that dissociate in water to form ions.
4. Seawater is the best conductor of electricity because ions carry a charge.

Explanation for incorrect option:

1. A - “All liquid conduct electricity” is a false statement as pure water can't conduct electricity
2. B - “Aluminum is an insulator” is incorrect as it can conduct electricity
3. C - “All solids conduct electricity” is incorrect as wood can't conduct electricity which is solid.

Hence option D is correct