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Why is HCl predominantly covalent in the...

Why is HCl predominantly covalent in the gaseous state but is ionic in squeous solution ?

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In HCl, the electronegativity difference in Cl and H atoms (3.0-2.1) is 0.9. Therefore, it is predominantly covalent in the gaseous state. When dissoved in water which is of polar nature, there an attraction between the atoms of the acid and polar `H_(2)O` molecules. Energy is released dureing attraction. This helps in the ionisation of the acid. Therefore, `C Cl_(4)` molecule, C-Cl bonds are polar but molecule is non ploar in aqueous solution.
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Knowledge Check

  • The compound is covalent in gaseous state but ionic in solid state is.

    A
    `PCl_5`
    B
    `PCl_3`
    C
    `C Cl_4`
    D
    `NH_3`

  • Asserartion: PCl_(5) is covalent in gaseous and liquide states but ionic in solid state. Reason: PCl_(5) in solid state consits of tetrahhedral PCl_(4)^(+) cation and octahedral PCl_(6)^(-) anion.

    A
    If both assertion and reason are true and reason is the true explanation of the asseraton.
    B
    If both assertion and reason are true and reason is not the correct explanation of the assertion.
    C
    If assertion is true bit reason is false.
    D
    If assertion is false but reason is true.

  • Assertion : PCl_(5) is covalent in gaseous and liquid state but ionic in solid state. Reason: PCl_(5) in solid state consists of tetrahedral PCl_(4)^(+) cation and octahedral PCl_(6)^(-) anion.

    A
    Both A and R are true and R is the correct explanation of A
    B
    Both A and R are true but R is false
    C
    A is true but R is false
    D
    A is false but R is true

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    Why is nitric oxide paramagnetic in gaseous state but the solid obtained on cooling it is diamagnetic ?

    Why is nitric oxide paramagnetic in gaseous state but the solid obtained on cooling it is diamagnetic ?

    Why is nitric oxide paramagnetic in gaseous state but the solid obtained on cooling it is diamagnetic ?

    Statement-1 : PCl_(5) is covalent in gaseous and liquid state but ionic in solid state. Statement-2 : The solid state of PCl_(5) consists of tetrahderal cation and octahedral anion.

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