# ionic Equilibrium MCQ Question with Answer

## ionic Equilibrium MCQ with detailed explanation for interview, entrance and competitive exams. Explanation are given for understanding. Question No : 1
Ionisation constant of formic acid is 1.8 x $1.8×{10}^{-4}$ at 298 K. In 0.1 NHCOOH the percentage ionisation of HCOOH acid is

0.18
42.4
4.24
2.89

Question No : 2
Solubility of calcium carbonate is 0.0305 gm/litre.${K}_{sp}$for $CaC{O}_{3}$ is

0.000305
193 x ${10}^{-8}$
9.3 x${10}^{-8}$
93.05 x${1}^{-5}$

Question No : 3
${K}_{sp}$for AgCl (mol wt 143.5) is 17 x ${10}^{-11}$ at 298K. The molar solubility of AgCl at 298 Kis

18.7 x${10}^{-5}$
2.3 x ${10}^{-3}$
9.90 x ${10}^{-3}$
1.3 x ${10}^{-5}$

Question No : 4
Strength of an acid depends on

hydrolysis
concentration of $O{H}^{-}$ ions
concentration of${H}^{+}$ ions
no. of moles of base used for neutralisation

Question No : 5
0.1 M acetic acid ionise to an extent of 1.34%. Ionisation constant of acetic acid is

0.00134
1.182
1.82 x ${10}^{-5}$
2.8 x ${10}^{-6}$1CF6

Question No : 6
Dissociation constant of 0.01 M HCN is 4 x${10}^{-10}$. The ${H}^{-}$ concentration in the solution is

Question No : 7
$BaS{O}_{4}$(Mol. wt 233) has solubility 0.009 gm$li{t}^{-1}$ at 298 K. Its solubility product is

1.521 x ${10}^{-5}$
152.1 x ${10}^{-19}$10"19
1.9 x ${10}^{-5}$
15.21 x ${10}^{-9}$