Question

Which of the following metal does not conduct electricity?

• A. Brass
• B. Barium
• C. Bismuth
• D. All Of These

Answer 1

The correct option is C

Bismuth

Explanation for correct option:

C. Bismuth$\left(\mathrm{Bi}\right)$

Metals:

• A metal is a class of substance that has high electrical/thermal conductivity.
• Metals are usually malleable as well as ductile in nature.
• Usually, metals are good conductors of heat and electricity.
• Some metals, that conduct electricity easily are Copper$\left(\mathrm{Cu}\right)$ as well as Silver$\left(\mathrm{Ag}\right)$.

Bismuth is a poor conductor of electricity as Bismuth is a metal that has five electrons in its valence shell. Thus it has high resistance to electric current.

Explanation for incorrect options:

A. Brass is an alloy of copper$\left(\mathrm{Cu}\right)$ and zinc$\left(\mathrm{Zn}\right)$ that contains $66\%$ and $34\%$ Zinc. Thus, it is a good conductor of electricity.

B. Barium$\left(\mathrm{Ba}\right)$ is a good conductor of electricity.

Hence, the correct option is C i.e. Bismuth.