Chemical & Ionic Equilibrium · JEE Main previous year questions

2009 1 question

1. Q662009 · 27 Apr 2009 · Shift 1

   Solid $\mathrm{Ba}(\mathrm{N}{\mathrm{O}}_3{)}_2$ is gradually dissolved in a $1.0\times 10^{-4}\mathrm{M}$ $\mathrm{N}{\mathrm{a}}_2\mathrm{C}{\mathrm{O}}_3$ solution. At what concentration of $\mathrm{B}{\mathrm{a}}^{2+}$ will a precipitate begin to form ? (${\mathrm{K}}_{\mathrm{sp}}$ for $\mathrm{BaC}{\mathrm{O}}_3=5.1\times 10^{-9}$)

   1. A.$5.1\times 10^{-5}\mathrm{M}$
   2. B.$8.1\times 10^{-8}\mathrm{M}$
   3. C.$8.1\times 10^{-7}\mathrm{M}$
   4. D.$4.1\times 10^{-5}\mathrm{M}$
   Show answer

   Answer: A