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Both PH(3) and PH(5) exist ....

Both `PH_(3)` and `PH_(5)` exist .

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The correct Answer is:
F
`PH_(3)` exists but `PH_(5)` does not This is because `EN` of H-atoms is not sufficient to excite `3p e^(-')s` to 3d orbitals .
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CENGAGE CHEMISTRY-CHEMICAL BONDING AND MOLECULAR STRUCTURE-Exercises True/False
  1. Acidic strength order CI(2)O(7) gtSO(3) gtP(4) O(10) .

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  2. Acidic strength order HCIO gtHBrO gtHIO .

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  3. Basic strength order NH(3) gtPH(3) gtAsH(3) gtBiH(3) .

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  4. XeO(3) is a trigonal pyramidal molecule .

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  5. The lanthanoid ions other than the f^(0) type and f^(14) types are all...

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  6. LiHCO(3) and Ca(HCO(3))(2) are not found in solid state .

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  7. All molecules with polar bonds have dipole moment.

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  8. Ionic bonds are non-directional while covalent bonds are directional.

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  9. The dipole moment of CH(3)F is greater than that of CH(3)Cl.

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  10. The presence of polar bonds in a polyatomic molecule suggests that the...

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  11. The boiling point of HCI is less than that of HF .

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  12. Both PH(3) and PH(5) exist .

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  13. sigma2s, pi^(**) (2p(x)) and pi(2p(x)) are gerade MO .

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  14. Out of NO,NO^(o+) and CN^(o+) the paramagnetic species is NO^(o+) .

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  15. Out of the following types of intermolecualar forces (a) Ion dipole (b...

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  16. The number of nodal planes in pi2p(x) and pi^(**)2p(x) are two and one...

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  17. The order of decreasing boiling point is Xe gtCH(4) gtNe gtHe gtH(2) .

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  18. The decreasing order of melting points is NH(3) gt (CH(3))(3) N gtPH(3...

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  19. Ot of CH(3)OH and (CH(3))(3)N both exhibit H-bonding .

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  20. CO(2) and N(3)^(Theta) have sane bond order and same shape .

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