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4. d and f- block elements — Chemistry STD 12 Science — Question

CBSE BoardEnglish MediumSTD 12 ScienceChemistry4. d and f- block elements1 Mark
MCQ
Which alloy contains $Cu, Sn$  and  $Zn$
  • ✓
    Gun metal
  • B
    Solder
  • C
    Bell metal
  • D
    German silver
✓

Answer

Correct option: A.
Gun metal
a
Gun metal  $= Cu + Sn + Zn$
Solder  $= Sn + Pb$
Bell metal  $= Cu + Sn$
German silver  $= Ni + Zn + Cu$

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