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| 1. |
Which is a stronger reducing agent, SbH_(3)orBiH_(3), and why? |
| Answer» SOLUTION :As we move down the group 15 elements from Sb to Bi, the atomic size increases and hence the strength of the BOND it makes with hydrogen decreases, i.e., Bi-H bond is WEAKER than Sb-H bond. In other works, `BiH_(3)` is thermally less stable than `SbH_(3)`. Therefore, on heating `BiH_(3)` has a greater TENDENCY to liberate hydrogen than `SbH_(3)` and hence `BiH_(3)` is a stronger reducing agent than `SbH_(3)`. | |