The ${K_{sp}}$ of ${\rm{PbC}}{{\rm{O}}_3}$ and ${\rm{MgC}}{{\rm{O}}_3}$ are $1.5 \times {10^{ - 15}}$ and $1 \times {10^{ - 15}}$ respectively at $298\;K$. The concentration of ${\rm{P}}{{\rm{b}}^{2 + }}$ ions in a saturated solution containing ${\rm{MgC}}{{\rm{O}}_3}$ and ${\rm{PbC}}{{\rm{O}}_3}$ is:

NEET UG CHEMISTRY MCQ: Equilibrium

1 Hard

1 of 1

Application +4 | -1

The

{K_{sp}}

\mathrm{PbC}{\mathrm{O}_3}

and

\mathrm{MgC}{\mathrm{O}_3}

are

1.5 \times {10^{ - 15}}

and

1 \times {10^{ - 15}}

respectively at

298\;K

. The concentration of

\mathrm{P}{\mathrm{b}^{2 + }}

ions in a saturated solution containing

\mathrm{MgC}{\mathrm{O}_3}

and

\mathrm{PbC}{\mathrm{O}_3}

is:

View answer and explanation

Correct option: B

3 \times {10^{ - 8}}\;M

Option D (

\mathrm{K}_{\mathrm{a}_3}=\mathrm{K}_{\mathrm{a}_1} \times \mathrm{K}_{\mathrm{a}_2}

) is correct because the overall ionization constant is the product of the stepwise ionization constants.

Practice All Chapter MCQs →

Mg{(HC{O_3})_2}

MgC{O_3}

Mg{(OH)_2}

MgC{O_3}

K_{\mathrm{P}}

\mathrm{CaCO}_3

4.5 \times 10^{-2}

\mathrm{C}(\mathrm{s})+\mathrm{CO}_2(\mathrm{g}) \rightleftharpoons 2 \mathrm{CO}(\mathrm{g}),

K_{\mathrm{P}}

2.0 \mathrm{~atm}.

\mathrm{CaO}

\mathrm{CaCO}_3

+

\leftrightharpoons

\mathrm{PC}{\mathrm{l}_5}\leftrightharpoons\mathrm{PC}{\mathrm{l}_3} + \mathrm{C}{\mathrm{l}_2}

{K_{\mathrm{eq}}} = 0.41

\mathrm{p}{K_a}