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Which of the following statement are correct about Zn, Cd and Hg? A. They exhibit high enthalpy of atomization as the d-subshell is full. B. Zn and Cd do not show variable oxidation state while Hg shows +I and +II. C. Compounds of Zn, Cd and Hg are paramagnetic in nature. D. Zn, Cd and Hg are called soft metals. Choose the most appropriate from the options given below: (1) B, D only (2) C, D only (3) B, C only (4) A, D only

1. B, D only
2. C, D only
3. B, C only
4. A, D only

Correct answer: B, D only

Solution

Option B is correct because zinc (Zn) and cadmium (Cd) typically have a stable oxidation state of +2, while mercury (Hg) can exhibit +1 and +2 states. Option D is also correct as Zn, Cd, and Hg are classified as soft metals due to their relatively low melting points and high ductility.

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