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Which of the following has the lowest en...

Which of the following has the lowest enthalpy of atomisation ?

A

V

B

Ti

C

Ni

D

Zn

Text Solution

Verified by Experts

The correct Answer is:
D
In general d-block elements exoibit higher enthalpies of atomisation on account of stronger boinding between atoms which arises due to participation of unpaired (n-1) d electrons in covalent bonding besides the participation of ns electrons in metallic bonding. In the 3d-series Sc (Z = 21) to Zn (Z = 30), the enthalpy of atomisation of zinic is the lowest, i.e., 126 kJ `mol^(-1)` because Zn has no unpaired (n-1) d electron available for additional convalent bonding.
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Knowledge Check

  • In first transition series which of the following has lowest enthalpy of atomisation?

    A
    Sc
    B
    Cu
    C
    Ti
    D
    Zn

  • Which of the following has the lowest density?

    A
    Be
    B
    Mg
    C
    Ca
    D
    Sr

  • Which of the following has lowest B.P

    A
    `CH_(3) - CH_(2)-CH_(2) - NH_(2)`
    B
    `CH_(3) - underset(NH_(2))underset(|)(CH) - CH_(3)`
    C
    `C_(2)H_(5)-NH-CH_(3)`
    D
    `(CH_(3))_(3)N`

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