The INCORRECT statement is:
d & f-Block Elements · Class 12 · JEE Main Previous Year Question
The INCORRECT statement is:
- a
Bronze is an alloy of copper and tin.
- b
Cast iron is used to manufacture wrought iron.
- c
German silver is an alloy of zinc, copper and nickel.
- d✓
Brass is an alloy of copper and nickel.
Brass is an alloy of copper and nickel.
Alloy Compositions:
| Alloy | Composition | Statement | |-------|-------------|----------| | Bronze | Cu + Sn | Correct ✓ | | Cast iron → Wrought iron | Pig iron processed | Correct ✓ | | German Silver | Cu + Zn + Ni | Correct ✓ | | Brass | Cu + Zn | Incorrect ✗ |
Brass is an alloy of copper (Cu) and zinc (Zn), NOT copper and nickel.
Copper + Nickel alloy is called Cupronickel (used in coins).
Answer: Option (4) — Brass is an alloy of copper and nickel (INCORRECT statement)
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