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Question
Which one of the following group-5 hydride is the strongest reducing agent?
Which one of the following group-5 hydride is the strongest reducing agent?
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Solution
The correct option is D BiH3
Down the group the bond dissociation enthalpy of M−H bond (where, M= group 15 element) decresaes.
Order of bond dissociation enthalpy:
N−H>P−H>As−H>Sb−H>Bi−H
Therefore, BiH3 can loose hydrogen very easily and hence has the highest reducing power.
Order of reducing power:
NH3<PH3<AsH3<SbH3<BiH3
Down the group the bond dissociation enthalpy of M−H bond (where, M= group 15 element) decresaes.
Order of bond dissociation enthalpy:
N−H>P−H>As−H>Sb−H>Bi−H
Therefore, BiH3 can loose hydrogen very easily and hence has the highest reducing power.
Order of reducing power:
NH3<PH3<AsH3<SbH3<BiH3
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