Question

Which of the following is not a good conductor of
electricity?
(1) Graphite (2) Distilled water
(3) Tap water (4) Bronze

Answer 1

Distilled water is not a good conductor

Answer 2

HELLO THERE!

Let me tell you some points:

(1) Graphite, being a non metal, is a good conductor of electricity due to flow of electrons within it. (Proof: A pencil conducts electricity, because its nib (lid) is made up of graphite).

(3) Tap water contains dissolved minerals. So, when current is passed through it, there is a free flow of ions which migrate towards electrodes for discharging. Hence, tap water conducts electricity. (Proof: When a bulb is connected to the circuit, it glows).

(4) Bronze: Bronze is an alloy of Copper and Tin, which are good conductors of electricity. So, bronze can also conduct electricity.

(2) But, distilled water neither contains free electrons, nor free mobile ions, to conduct electricity. Hence, distilled water does not conduct electricity. (Proof: Take distilled water and pass current through it. Connect a bulb to the circuit, it does not glow).

HOPE MY ANSWER IS SATISFACTORY...

THANKS!