Question

This is not an alloy of copper:

• A. Brass
• B. Bronze
• C. Solder
• D. Duralumin

Answer 1

The correct option is C

Solder

An alloy is a homogeneous mixture of two or more metals, or a metal and a non-metal.

Explanation for correct option (c):

Solder contains:

• Solder alloy is also known as fuse metal alloy, it is made up of lead and tin.
• Its composition is $50\%$ lead, and $50\%$ tin. It does not contain copper in it.

Explanation for incorrect options:

(a) Brass
Brass contain $60-80\%$ copper.

(b) Bronze
Bronze contain $80\%$ copper.

(d) Duralumin

Duralumin contain $4\%$ copper.

Therefore, option (c) Solder is correct.