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Bond angle in PH(3) is...

Bond angle in `PH_(3)` is

A

Much less than `NH_(3)`

B

Much less than `PF_(3)`

C

More than `NH_(3)`

D

More than `PF_(3)`

Text Solution

Verified by Experts

The correct Answer is:
A, B
Bond angles `{:(NH_(3)gt,PF_(3)gt,PH_(3),,),((107^(@)),(98^(@)),(94^(@)),,):}`
`PF_(3) gt PH_(3)` F-atoms are larger than H-atoms and need more space
`NH_(3) gt PH_(3)` Bond angle decreases down group 15 hydrides .
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Knowledge Check

  • Bond angle in PH_3 si closer to 90^(@) while that in NH_3 is 104.5^(@) . Which of the following best explains this structural feature?

    A
    Due to larger size of the lone pair electron cloud, there is larger lone pair - bond pair repulsion in `PH_3` compared to `NH_3`
    B
    Higher electronegativity of nitrogen concentrates the bond pair electron cloud near the central atom which increases the bond pair - bond pair repulsion which in turn decreases the bond angle in `NH_3`
    C
    Energy difference between 3s an,d 3p orbitals is quite high and hence the lone pair on phosphorous prefers to occupy unhybridized s- orbital rather than hybridized `sp^3` hydridized orbital which causes its s-orbital energy to increase.
    D
    Phosphorous forms `ppi-dpi` bonds while nitrogen does not.

  • Bond angle in I_(3)^(Θ) is .

    A
    More than `CIO_(2)`
    B
    `180^(@)`
    C
    Less than `CIO_(2)`
    D
    `gt 109.5^(@)`

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