Brass is an alloy and it is a mixture of _____?
Answer & explanation
Correct answer: option 1
The correct answer is Option (1) → Zinc and Copper
An alloy is a uniform mixture of a metal with other metals or a non-metal, made to improve its properties. Brass is copper mixed with zinc (usually about 60–70% copper); it is harder than copper and does not corrode easily, so it is used for taps, utensils and musical instruments.
Why the other options are incorrect
Option (2) Iron and Zinc — Incorrect. Zinc is used to coat iron against rusting (galvanisation); that is a coating, not brass.
Option (3) Copper and Tin — Incorrect. Copper and tin make bronze, a different alloy.
Option (4) Zinc and Lead — Incorrect. Brass contains no lead as a main part; lead goes with tin in solder.