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Although PF5, PCl5 and PBr5 are known, t...

Although `PF_5, PCl_5` and `PBr_5` are known, the pentahalides of nitrogen have not been observed.
Phosphorous has lower electronegativity than nitrogen.

A

Assertion `(A)` is true , Reason `( R)` is also true , Reason `( R)` is the correct explanation for Assertion `(A)`.

B

Assertion `(A)` is true , Reason `( R)` is true , Reason `( R)` is not the correct explanation for Assertion `(A)`.

C

Assertion `(A)` is true , Reason `(R )` is false.

D

Assertion `(A)` is false , Reason `( R)` is true.

Text Solution

Verified by Experts

The correct Answer is:
B
`(A)` and `( R)` are both correct but `( R)` is not correct explanation for `(A)`. Nitrogen does not form pentahalides because it does not have `d-"orbitals"`. The electronegativity of `P` is less than that of `N`.
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Knowledge Check

  • Asseration:Although:Although PF_(5),PCl_(5) and PBr_(5) are known, the pentahalides of nitrogen have not been observed. Reason: Phosphorus has lower electronegative than nitrogen.

    A
    If both asseration and reson are true and the reason is the correct explanation of the asseration.
    B
    If both asseration and reason are true ans the reason is the correct explanation of the asseration.
    C
    If asseration is true but reason is false.
    D
    If asseration is false but reason is true.

  • Assertion : Pentahalides of phosphorus are known but not those of nitrogen. Reason : Phosphorus has lower electronegativity than nitrogen.

    A
    If both assertion and reason are correct and reason is correct explanation for assertion.
    B
    If both assertion and reason are correct but reason is not correct explanation for assertion.
    C
    If assertion is correct but reason is incorrect.
    D
    If both assertion and reason are incorrect.

  • Assertion: PH_(3) is more readily oxidised than NH_(3) Reason: Phosphorous is less electronegative than nitrogen.

    A
    Both A and R are correct and R is the correct explanation of A
    B
    Both A and R are correct and R is not the correct explanation of A
    C
    A is correct R is wrong
    D
    A is wrong R is correct

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