Question

which among the following is an insulator, 1) copper 2) Diamond 3)silicon 4) germanium​

Answer 1

Answer:

Correct Answer is 2)Diamond. Diamond is a pure insulator of electricity.

Explanation:

Diamond is made up of Carbon Atoms. As Carbon have 4 electrons in it's outermost shell, it makes bonds by sharing of electrons and do covalent bondings. In Diamond, a Carbon Atom is bonded to four other Carbon atoms by covalent bonds, making it a tightly-packed solid. As the carbon atoms are strongly bonded with each other, the bonds don't break even by applying energy, hence making them insulators.

Germanium and Silicon are Semiconductors, they are insulators at room temperature but began to work as conductors at higher temperatures.

Copper is a Conductor of electricity.