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The melting points and the boiling point...

The melting points and the boiling points of the transitions elements are higher than the corresponding s-block elements. This is because

A

Transition metals have smaller size

B

Of the presence of one or more unpaired electrons contribution to higher inter atomic forces on account of covalent bond

C

of strong metalic bond due to small size and higher ionization energy

D

of the presence of vacant d-orbitals

Text Solution

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The correct Answer is:
D
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Knowledge Check

  • Atoms of the transition elements are smaller than those of the s-block elements, because:

    A
    Threre is increase in the cuclear charge along the period
    B
    orbital electrons are added to the penultimate d-subshell rather than to the outer shell of the atom
    C
    the shielding effect of d-electrons is small.
    D
    All of these.

  • Atoms of the transition element are smaller than those of the s-block elements, because :

    A
    there is increase in the nuclear charge along the period.
    B
    orbital electrons are added to the penultimate d-subshell rather than to the outer shell of the atom.
    C
    the sheilding effect of d-electrons is small.
    D
    All of these

  • In general the melting and boiling points of transition metals

    A
    increases gradually across the period from left to right
    B
    decreases gradually across the period from left to right
    C
    first increases till the middle of the period and then decreases towards the end
    D
    First decreases regulary till the middle of the period and then increases towards the end.

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