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NCERT Class XII Chemistry
Chapter - The d- and f-Block Elements
Questions with Solutions

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Question : 45
Total: 49
Which is a stronger reducing agent Cr‌2+ or Fe‌2+ and why?
Solution:  
Cr‌2+ is stronger reducing agent than Fe‌2+
Reason: d‌4 → d‌3occurs in case of Cr‌2+to Cr‌3+.
But d‌6 → d‌5occurs in case of Fe‌2+ to Fe‌3+.
In a medium (like water) d‌3is more stable as compared to d‌5
.
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