Which of the following metals is common to both brass and bronze?

Step 1: Analyze the question We need the metal found in both brass and bronze. Both are alloys, which are mixtures of metals.

Step 2: Recall the concept

• Brass = Copper + Zinc
• Bronze = Copper + Tin

Step 3: Compare the compositions Both alloys contain copper. Zinc appears only in brass, and tin appears only in bronze.

Step 4: Check the options

• A. Aluminium: not a main component of either alloy (it appears only in aluminium bronze, a special type).
• B. Copper: the main component of both brass and bronze.
• C. Lead: not a main component. It is sometimes added in small amounts to improve machinability.
• D. Iron: not a component of either one.

Answer: B. Copper

Exam tip: Remember "Brass = Copper + Zinc" and "Bronze = Copper + Tin". Copper is the base metal for both. Questions on alloys often ask for the common metal, so always look for copper first.