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Q.

Which of the following statements are colrect about Zn, Cd and Hg?
(I) they exhibit high enthalpies of atomisation as the d-subshell is full
(II) Zn and Cd do not show variable oxidation states while Hg shows +I and +II
(III) Compound of Zn, Cd and Hg are paramagnetic in nature
(M Zn, Cd and Hg are called soft metals

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a

I, III

b

IV only

c

I, II, III

d

II, IV

answer is C.

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Detailed Solution

Zn, Cd, Hg exhibit low enthalpies of atomisation as the d-subshell is full. Compounds of Zn, Cd and Hg are diamagnetic in nature.

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