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Hydrides of group 15 are Lewis bases.

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Hydrides of group 15 are Lewis bases.

1. Give reason.

2. Arrange the group 15 hydrides in the decreasing order of basic strength.

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1. Due to the presence of lone pair on the central atom which is available for donation.

2. NH3 > PH3 > ASH3 > SbH3 ≥ BiH3.

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