NEET UG CHEMISTRY MCQ: d & f- BLOCK ELEMENTS

Option B ($10 \mathrm{~mL}$ of $1 \mathrm{M} \mathrm{~KMnO}_4$ solution oxidises $10 \mathrm{~mL}$ of $5 \mathrm{~N} \mathrm{~FeSO}_4$ solution) is correct because the n-factor for $KMnO_4$ in acidic medium is 5, so 1 M $KMnO_4$ is equivalent to 5 N $KMnO_4$.