MCQ
The element which is essential in nitrogen fixation is
- AZinc
- BCopper
- ✓Molybdenum
- DBoron
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How many moles of $Sn^{2+}$ will be oxidized by $1\, mol \,Cr_2O_7^{2-}$ into $Sn^{4+}$ ?

Which product will not likely to form