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Ammonia has a higher proton affinity tha...

Ammonia has a higher proton affinity than phosphine. Discuss.

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Ammonia `(NH_(3))` has a higher proton affinity than phosphine `(PH_(3))` because it is more basic. It is because of smaller size of nitrogen atom and greater electron density on it as compared to bigger size of phosphorus atom and lesser electron density on it.
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(a) Draw the structures of the following : (i) PCl_(5) (s) (ii) SO_(3)^(2-) Explain the following observations : (i) Ammonia has a higher boiling point than phosphin. (ii) Helium does not form any chemical compound. (iii) Bi (V) is a stronger oxidising agent than Sb (V).

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Knowledge Check

  • (A) Chlorine has higher electron affinity than fluorine. (R) Chlorine is a poor oxidising agent than fluorine.

    A
    Statement-1 (A) and statement-2 (R) are true and statement-2 (R) is the correct explanation for statement-1 (A).
    B
    Statement-1 (A) and statement-2 (R) are true and statement-2 (R) is not the correct explanation for statement-1 (A)
    C
    Statement-1 (A) is true, statement-2 (R) is false
    D
    Statement-1 (A) is false, statement-2 (R) is true

  • Assertion: Oxides are more ionic than corresponding sulphides. Reason: Oxygen has higher electron affinity than sulphur.

    A
    Both A and B true and R is the correct explanation A
    B
    Both A and R are true but R is not a correct explanation of A
    C
    A is true but R is false
    D
    A is false but R is true

  • Fluorine has lower electron affinity than chlorine because of

    A
    Smaller radius of fluorine, high density
    B
    Smaller radius of chlorine, high density
    C
    Bigger radius of fluorine, less density
    D
    Smaller radius of chlorine, less density

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    NH_(3) has higher proton affinity than PH_(3) . Explain. Or NH_(3) is more basic than PH_(3) .

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