Equivalent, Molar Conductivity and Cell Constant

Q. Solubility of $KN{O}_3$ at $333\text{K}$ is $106\text{g}$. What mass of $KN{O}_3$ is needed to form a saturated solution in $75\text{g}$ of water at $333\text{K}$?
(Note: saturated solution is formed by dissolving substance in $100\text{g}$ of water)

1. $31\text{g}$
2. $70.7\text{g}$
3. $75\text{g}$
4. $79.5\text{g}$

Q. The resistance of 0.01 N solution of an electrolyte is 210 $\Omega$ at 298 K with a cell constant of 0.88 $c{m}^{-1}$. Calculate the conductivity and equivalent conductivity of the solution.

1. $4.19\times {10}^{-3}oh{m}^{-1}c{m}^{-1},419.05Sc{m}^{2}e{q}^{-1}$
2. $5.19\times {10}^{-3}oh{m}^{-1}c{m}^{-1},519.05Sc{m}^{2}e{q}^{-1}$
3. $6.19\times {10}^{-3}oh{m}^{-1}c{m}^{-1},619.05Sc{m}^{2}e{q}^{-1}$
4. $7.19\times {10}^{-3}oh{m}^{-1}c{m}^{-1},719.05Sc{m}^{2}e{q}^{-1}$

Q. <!--td {border: 1px solid #ccc;}br {mso-data-placement:same-cell;}--> What do the following symbols [or formula] denote : $\text{2H}$ ; ${\text{H}}_2$ ; ${\text{H}}^{+}$

Q.

Equivalent conductance of 0.1 M HA(weak acid) solution is $1Sc{m}^{2}equivalent-1$ and that at infinite dilution is $1Sc{m}^{2}equivalent-1$ Hence pH of HA solution is

1. 1.3

2. 1.7

3. 2.3

4. 3

Q. Conductance of 0.1 M KCl (conductivity = x $oh{m}^{-1}c{m}^{-1}$)
filled in a conductivity cell is y $oh{m}^{-1}$. If the conductance of 0.1 M NaOH filled in the same cell is z $oh{m}^{-1}$, molar conductance of NaOH will be :

1. $0.1\frac{xz}{y}$
2. ${10}^3\frac{xz}{y}$
3. ${10}^4\frac{xz}{y}$
4. $10\frac{xz}{y}$

Q. Equivalent conductivity ${\wedge }_{eq}$

1. $\frac{k\times 1000}{M}oh{m}^{-1}c{m}^{r}E{q}^M-molarity$
2. $\frac{k\times 1000}{N}oh{m}^{-1}c{m}^{r}E{q}^{-1}N-normality$
3. None of the above
4. $\frac{k\times 1000}{m}oh{m}^{-1}c{m}^{r}E{q}^{-1}m-molality$

Q. Assertion :In a titration of weak acid with strong base, the $pH$ at the half equivalence point is $p{K}_a$ Reason: At half equivalence point, it will form acidic buffer at it's maximum capacity where [acid] = [salt]

1. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
2. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
3. Assertion is correct but Reason is incorrect
4. Both Assertion and Reason are incorrect

Q. Which of the following statement(s) are true?
a. Galvanic cell converts electrical energy into chemical energy.
b. Gold-198 is used in the treatment of cancer.
c. The anode is positive in an electrolytic cell.
d. Salt bridge connects electrolytes of two half-cells.

Q.

How many ohms does $1M\Omega$have

1. ${10}^3\Omega$

2. ${10}^9\Omega$

3. ${10}^6\Omega$

4. ${10}^{12}\Omega$