Which of the following elements is not present in Duralumin?
(a) Al
(b) Zn
(c) Cu
(d) Mg
WBBSE
Class X
Physical Science
Metallurgy
01 Mark
2026
(b) Zn
Explanation
Duralumin is an alloy composed mainly of:
- Aluminium (Al)
- Copper (Cu)
- Magnesium (Mg)
- Manganese (Mn)
Zinc (Zn) is not a constituent of duralumin.
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