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NEET2013ChemistryClassification of Elements and Periodicity in PropertiesActual

Identify the correct order of solubility in aqueous medium.

Options

  1. ACuS > ZnS > Na ₂ ~S
  2. BZnS > Na ₂ ~S > CuS
  3. CNa ₂ ~S > CuS > ZnS
  4. DNa ₂ ~S > ZnS > CuS

Correct answer

D. Na ₂ ~S > ZnS > CuS

Step-by-step solution

lonic compounds are more soluble in water or in aqueous medium. lonic character size of cation (if anion is same) The order of size of cation is Na ⁺> Zn ²⁺> Cu ²⁺ The order of ionic character and hence, of solubility in water is as Na ₂ ~S > ZnS > CuS

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