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27. In case o...

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27. In case of hydride of group 15 bond angle decreases down the group but it is said that the bond angle is less than expected dua lone pair bond pair repulsion and down the group this repulsion decrease so bond angle should increase? ?

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Q. Bond angle of Group-16 hydrides decreases down the group and the bond angle of

H_{2} T e

is approximately

90^{0} .

Q. Assertion: All

F - S - F

S F_{4}

are greater than

90^{o}

180^{o}

.
Reason: The lone pair-bond pair repulsion is weaker than bond pair-bond pair repulsion.

Why does bond angle in hydrides decrease on going down the group?

Q. Assertion :All

F - S - F

{S F}_{4}

are greater than

90^{o}

but lesser than

180^{o}

. Reason: The lone pair-bond pair repulsion is weaker than bond pair-bond pair repulsion

Q. Assertion :All

F - S - F

{S F}_{4}

is greater than

90^{o}

but lesser than

180^{o}

. Reason: The lone pair-bond pair repulsion is stronger than bond pair-bond pair repulsion.

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