engineering recuitment BARC Stipendiary Trainee Category II 2023 Mock Test General Science Chemistry Chemistry in Everyday Life

পিতল নিম্নলিখিত কোনটির একটি সংকর ধাতু?

1
Cu এবং Zn
2
Cu এবং Fe
3
Sn এবং Pb
4
Cu এবং Al
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