Conductance and Conductivity

Q. State True or False?
Conductance is also dependent on the factors on which resistance is dependent

1. True
2. False

Q. The resistance of a 0.1 $N$ solution of a salt is found to be $2.5\times {10}^3$ $ohm$. The equivalent conductance of the solution is: (Cell constant = $1.15c{m}^{-1}$)

1. $5.6Sc{m}^2/eq$
2. $4.6Sc{m}^2/eq$
3. $6.6Sc{m}^2/eq$
4. $7.6Sc{m}^2/eq$

Q. The standard units of conductivity or specific conductance [k] is
Where S = Siemens
cm = centimeter

1. $S^{-1}c{m}^{-1}$
2. $Sc{m}^{-1}$
3. $Scm$
4. $S^{-1}cm$

Q. Resistance is reciprocal of conductance. True or false?

1. True
2. False

Q.

Which of the following shows electrical conduction

[CBSE PMT 1999; AIIMS 1999]

1. Potassium

2. Sodium

3. Graphite

4. Diamond

Q. The resistance of a $0.5M$ solution of an electrolyte in a cell was found to be $50\Omega$. If the electrodes in the cell are $2.2cm$ apart and have an area of $4.4c{m}^2$ then the molar conductivity (in $S{m}^{2}mo{l}^{-1}$) of the solution is:

1. 0.2
2. None of these
3. 0.02
4. 0.002

Q. When a solution of specific conductance $1.342{\text{Sm}}^{-1}$ was placed in a conductivity cell with parallel electrodes, the resistance was found to be $170.5\text{ohm}$. The area of the electrodes is $1.86\times {10}^{-4}{\text{m}}^2$ . Calculate the distance between the electrodes.

1. $0.0452\text{m}$
2. $4.25\text{m}$
3. $42.5\text{m}$
4. $0.425\text{m}$

Q. The molar conductance of $N{H}_{4}OH$ at 0.01M concentration is 11.3 $oh{m}^{-1}c{m}^{2}mo{l}^{-1}$. The degree of dissociation
of $N{H}_{4}OH$ is
(molar conductance at infinite dilution is 271.1)

1. $12.6\%$
2. $4.2\%$
3. $1.3\%$
4. $41\%$

Q. The resistance of a $0.2\text{M}$ solution of an electrolyte is $50\Omega$. The specific conductance of the solution is $1.4{\text{S m}}^{-1}$ .
The resistance of a $0.5\text{M}$ solution of the same electrolyte occupying the same volume is $280\Omega$. The molar conductivity of the above mentioned $0.5\text{M}$ solution of the electrolyte in ${\text{S m}}^2{\text{mol}}^{-1}$ is:

1. $5\times {10}^3$
2. $5\times {10}^2$
3. $5\times {10}^{-3}$
4. $5\times {10}^{-4}$

Q. The correct order of equivalent conductance at infinite dilution for $LiCl$, $NaCl$, and $KCl$ would be:

1. $LiCl\cong NaCl>KCl$
2. $LiCl>KCl>NaCl$
3. $KCl>NaCl>LiCl$
4. $LiCl>NaCl>KCl$