Teaching DSSSB TGT Mock Test 2025 Chemistry General Principles And Process of Isolation of Elements Metals and Its Ores

ব্রোঞ্জ পদার্থ হয় মিশ্রণ:

1
​Cu + Sn
2
Cu + Zn
3
Cu + Si
4
কোনটিই নয়
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