Conductivity of Ionic Solutions

Q. Which of the following has highest conductivity in aqueous solution?

1. $\left[Co\right(N{H}_3{)}_4]C{l}_3$
2. $\left[Co\right(N{H}_3{)}_6]C{l}_2$
3. $\left[Ni\right(CO{)}_4]$
4. Cannot be predicted

Q. The equivalent conductivity of a 0.01 N solution of a monobasic acid is 70.0 S $c{m}^{2}e{q}^{-1}$. If the equivalent conductivity of the acid at infinite dilution is 350 $Sc{m}^{2}e{q}^{-1}.$ Then

1. The degree of dissociation of the acid is 20 %
2. The dissociation constant of the acid is $5.0\times {10}^{-4}$
3. The osmotic pressure of the solution is 22.4 cm of Hg at 300K
4. The pH of the solution is 2.7

Q. Which of the following options are correct for solubility and solubility product of
$C{O}_2\left[Fe{\left(CN\right)}_6\right]$ in water at ${25}^{\circ }$. Conductivity of a saturated solution of $C{O}_2\left[Fe{\left(CN\right)}_6\right]$ is $2.06\times {10}^{-6}{\Omega }^{-1}{\text{cm}}^{-1}$ and that of water used is $4.1\times {10}^{-7}{\Omega }^{-1}{\text{cm}}^{-1}.$
The ionic molar conductivities of $C{o}^{2+}\text{and}Fe(CN{)}_6^{4-}$ are $86.0{\Omega }^{-1}{\text{cm}}^2{\text{mol}}^{-1}\text{and}444.0{\Omega }^{-1}{\text{cm}}^2{\text{mol}}^{-1},$ respectively.

1. $K_{sp}=7.69\times {10}^{-17}$
2. $K_{sp}=7.6872\times {10}^{-14}$
3. $\text{Solubility =}2.6\times {10}^{-6}\text{mol/L}$
4. $\text{Solubility =}2.6\times {10}^{-5}\text{mol/L}$

Q. An aqueous solution of X is is added slowly to an aqueous solution of Y as shown in Column I. The variation in conductivity of these reactions is given in Column II. Match Column I with Column II and select the correct answer using the codes given below the Columns.
$\begin{array}{cc}ColumnI& ColumnII\\ P.\underset{X}{(C_2{H}_5{)}_3}N+\underset{Y}{C{H}_{3}COOH}& 1.Conductivitydecreasesandthenincreases\\ Q.\underset{X}{KI\left(0.1M\right)}+\underset{Y}{AgN{O}_3}\left(0.01M\right)& 2.Conductivitydecreasesandthendoesnotchangemuch\\ R.\underset{X}{C{H}_{3}COOH}+\underset{Y}{KOH}& 3.Conductivityincreasesandthendoesnotchangemuch\\ S.\underset{X}{NaOH}+\underset{Y}{HI}& 4.Conductivitydoesnotchangemuchandthenincreases\end{array}$

1. P - (3) Q - (4) R - (2) S - (1)
2. P - (4) Q - (3) R - (2) S - (1)
3. P - (2) Q - (3) R - (4) S - (1)
4. P - (1) Q - (4) R - (3) S - (2)

Q. The specific conductance of an acid HA of 0.1 M concentration is $3.75\times {10}^{-4}{\Omega }^{-1}c{m}^{-1}$. If ${\lambda }^{\infty }\left(HA\right)=250{\Omega }^{-1}c{m}^{2}mo{l}^{-1}$. The dissociation constant $K_a$ of HA is $y\times {10}^{-5}$. Find the value of y