Which of the following states is strong reducing agent?

Options

A. `Cr (+III)`
B. `Cr (+VI)`
C. `Mo(+Vi)`
D. `MO(+III)`

Answer

D

Explanation

Reducing propery of elements depends upon size of the atom or ion. Larger the size of atom or ion stronger will be the reducing agent.
Mo has larger size than Cr
`Mo^(3+)` has larger size than `Mo^(4+).` Hence `Mo^(3+)` is stronger reducing agent.