H2S is passed into one dm3 of a solution containing 0.1 mole of Zn2+ and 0.01 mole of Cu2+ till the sulphide ion concentration reaches 8.1 × 10–19 moles. Which one of the following statements is true?[Ksp of ZnS and CuS are 3 × 10–22 and 8 × 10

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Q:13

H₂S is passed into one dm³ of a solution containing 0.1 mole of Zn²⁺ and 0.01 mole of Cu²⁺ till the sulphide ion concentration reaches 8.1 × 10^–19 moles. Which one of the following statements is true?
[K_sp of ZnS and CuS are 3 × 10^–22 and 8 × 10^–36 respectively]

Only ZnS precipitates

Both CuS and ZnS precipitate

Only CuS precipitates

No precipitation occurs

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The equilibrium constants $\text{K}_{P_{1}}$ and $\text{K}_{P_{1}}$ for the reactions

X ⇌ 2Y and Z ⇌ P + Q

respectively are in the ratio of 1 : 9. If the degree of dissociation of X and Z be equal then the ratio of total pressure at these equilibria is

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