JEE MAIN - Chemistry (2024 - 29th January Evening Shift - No. 8)
Which of the following statements are correct about $$\mathrm{Zn}, \mathrm{Cd}$$ and $$\mathrm{Hg}$$ ?
A. They exhibit high enthalpy of atomization as the d-subshell is full.
B. $$\mathrm{Zn}$$ and $$\mathrm{Cd}$$ do not show variable oxidation state while $$\mathrm{Hg}$$ shows $$+\mathrm{I}$$ and $$+\mathrm{II}$$.
C. Compounds of $$\mathrm{Zn}, \mathrm{Cd}$$ and $$\mathrm{Hg}$$ are paramagnetic in nature.
D. $$\mathrm{Zn}, \mathrm{Cd}$$ and $$\mathrm{Hg}$$ are called soft metals.
Choose the most appropriate from the options given below:
C, D only
B, C only
A, D only
B, D only
Explanation
(A) $$\mathrm{Zn}, \mathrm{Cd}, \mathrm{Hg}$$ exhibit lowest enthalpy of atomization in respective transition series.
(C) Compounds of $$\mathrm{Zn}, \mathrm{Cd}$$ and $$\mathrm{Hg}$$ are diamagnetic in nature.
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