Which is a stronger reducing agent Cr²+} or ...

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

Question : 45 of 49

Marks: +1, -0

Which is a stronger reducing agent Cr

^{2+}

or Fe

^{2+}

and why?

Solution:

^{2+}

is stronger reducing agent than Fe

^{2+}

Reason: d

^{4}

→ d

^{3}

occurs in case of Cr

^{2+ }

to Cr

^{3+}

But d

^{6}

→ d

^{5}

occurs in case of Fe

^{2+}

to Fe

^{3+}

In a medium (like water) d

^{3}

is more stable as compared to d

^{5}

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