Identify the correct order of solubility of ${\rm{N}}{{\rm{a}}_2}{\rm{S}},{\rm{CuS}}$ and ${\rm{ZnS}}$ in aqueous medium:

${\rm{N}}{{\rm{a}}_2}{\rm{S}} > ZnS > CuS$

${\rm{CuS}} > ZnS > N{{\rm{a}}_2}{\rm{S}}$

${\rm{ZnS}} > N{{\rm{a}}_2}{\rm{S}} > CuS$

${\rm{N}}{{\rm{a}}_2}{\rm{S}} > CuS > ZnS$

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NEET UG CHEMISTRY MCQ: CLASSIFICATION OF ELEMENTS AND PERIODICITY IN PROPERTIES

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Identify the correct order of solubility of

\mathrm{N}{\mathrm{a}_2}\mathrm{S},\mathrm{CuS}

and

\mathrm{ZnS}

in aqueous medium:

View answer and explanation

Correct option: D

\mathrm{N}{\mathrm{a}_2}\mathrm{S} > ZnS > CuS

Option D (

\mathrm{N}{\mathrm{a}_2}\mathrm{S} > ZnS > CuS

) is correct because alkali metal sulfides are generally soluble, while transition metal sulfides are generally insoluble, with CuS being the least soluble due to its high lattice energy.

NEET UG CHEMISTRY MCQ: CLASSIFICATION OF ELEMENTS AND PERIODICITY IN PROPERTIES

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