Teaching BPSC बिहार मध्य विद्यालय (6 to 8) शिक्षक भर्ती 4.0 Mock Test General Science Chemistry

Duralumin alloy consists of Al, Mn, ________.

1

Mg and Cu

2

Fe and Ni

3

Zn and Ni

4

More than one of the above

5

None of the above

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