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Q.

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

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a

(n−1)d electrons involve in bonding

b

(n−1)d electrons donot involve in bonding

c

Larger size of zinc

d

Stronger metallic bond in zinc

answer is B.

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Detailed Solution

  • Due to the absence of unpaired electrons in ns and (n–1)d shells, the interatomic electronic bonding is the weakest in zinc. 
  • Consequently, zinc has the least enthalpy of atomisation in the 3d series of transition elements.
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