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Q.

Heat of atomization of zinc is lowest among 3d block elements due to

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a

(n – 1)d electrons do not involve in bonding

b

(n – 1)d electrons involve in bonding

c

Stronger metallic bond in zinc

d

Larger size of zinc

answer is B.

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Detailed Solution

No electrons from 3d orbitals are involved in case of zinc, while in all other metals of the 3d series, electrons from the d-orbitals are always involved in the formation of metallic bonds. That is why, the enthalpy of atomization of Zinc is the lowest in the series

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