Teaching Bihar STET Paper 1 (माध्यमिक) Mock Test 2024 General Science Chemistry Chemical Reaction

निम्नलिखित अभिक्रियाओं में से कौन-सी संभव नहीं है ?

1
PbSO4 + Fe
2
Al + CuSO4
3
Zn + CaSO4
4
Mg + ZnSO4
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