330454
For a strong electrolyte, a plot of molar conductivity against (concentration) \({\mathrm{{ }^{1 / 2}}}\) is a straight line, with a negative slope, the correct unit for the slope is
For strong electrolyte, \({\mathrm{\Lambda_{m}=\Lambda_{m}^{\circ}-A \sqrt{C}}}\) \(\begin{aligned}& \text { Slope, } \mathrm{A}=\dfrac{\Lambda_{\mathrm{m}}^{\circ}-\Lambda_{\mathrm{m}}}{\sqrt{\mathrm{C}}} \\& \begin{aligned}\therefore \text { Units of } \mathrm{A} & =\dfrac{\mathrm{S} \cdot \mathrm{cm}^{2} \cdot \mathrm{mol}^{-}}{\left.\left(\mathrm{mol}^{-} \cdot \mathrm{lit}\right)^{-}\right)^{\frac{1}{2}}} \\& =\mathrm{S\,cm}^{2} \mathrm{~mol}^{-3 / 2} \mathrm{~L}^{1 / 2}\end{aligned}\end{aligned}\) So, the correct option is (4).
JEE Main - 2024
CHXII03:ELECTROCHEMISTRY
330470
\(\mathrm{NaCl}, \mathrm{MgCl}_{2}\) and \(\mathrm{CaSO}_{4}\) are known as:
1 1-1,2-1,2-2 type of electrolytes respectively.
2 Strong, weak and strong electrolytes respectively.
3 Electrolytes with different value of A.
4 Electrolytes with same molar conductivity.
Explanation:
Depending on the charges on the cation and anion produced in the dissociation of the electrolyte in solution, the type of electrolytes are known as \(1-1,2-1\) and \(2-2\) electrolytes respectively. \(\mathrm{NaCl} \rightarrow \mathrm{Na}^{+}+\mathrm{Cl}^{-}(1-1)\) \(\mathrm{MgCl}_{2} \rightarrow \mathrm{Mg}^{2+}+2 \mathrm{Cl}^{-}(2-1)\) \(\mathrm{CaSO}_{4} \rightarrow \mathrm{Ca}^{2+}+\mathrm{SO}_{4}^{2-}(2-2)\)
CHXII03:ELECTROCHEMISTRY
330455
Which out of the following is a correct equation to show change in molar conductivity with respect to concentration for a weak electrolyte, if the symbols carry their usual meaning?
330456
Assertion : Specific conductance decreases with dilution whereas equivalent conductance increases. Reason : On dilution, number of ions per millilitre decreases but total number of ions increases considerably.
1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but Reason is correct.
Explanation:
On dilution, number of ions per millilitre decreases. Total number of ions increases only in case of weak electrolytes. So, option (3) is correct.
330454
For a strong electrolyte, a plot of molar conductivity against (concentration) \({\mathrm{{ }^{1 / 2}}}\) is a straight line, with a negative slope, the correct unit for the slope is
For strong electrolyte, \({\mathrm{\Lambda_{m}=\Lambda_{m}^{\circ}-A \sqrt{C}}}\) \(\begin{aligned}& \text { Slope, } \mathrm{A}=\dfrac{\Lambda_{\mathrm{m}}^{\circ}-\Lambda_{\mathrm{m}}}{\sqrt{\mathrm{C}}} \\& \begin{aligned}\therefore \text { Units of } \mathrm{A} & =\dfrac{\mathrm{S} \cdot \mathrm{cm}^{2} \cdot \mathrm{mol}^{-}}{\left.\left(\mathrm{mol}^{-} \cdot \mathrm{lit}\right)^{-}\right)^{\frac{1}{2}}} \\& =\mathrm{S\,cm}^{2} \mathrm{~mol}^{-3 / 2} \mathrm{~L}^{1 / 2}\end{aligned}\end{aligned}\) So, the correct option is (4).
JEE Main - 2024
CHXII03:ELECTROCHEMISTRY
330470
\(\mathrm{NaCl}, \mathrm{MgCl}_{2}\) and \(\mathrm{CaSO}_{4}\) are known as:
1 1-1,2-1,2-2 type of electrolytes respectively.
2 Strong, weak and strong electrolytes respectively.
3 Electrolytes with different value of A.
4 Electrolytes with same molar conductivity.
Explanation:
Depending on the charges on the cation and anion produced in the dissociation of the electrolyte in solution, the type of electrolytes are known as \(1-1,2-1\) and \(2-2\) electrolytes respectively. \(\mathrm{NaCl} \rightarrow \mathrm{Na}^{+}+\mathrm{Cl}^{-}(1-1)\) \(\mathrm{MgCl}_{2} \rightarrow \mathrm{Mg}^{2+}+2 \mathrm{Cl}^{-}(2-1)\) \(\mathrm{CaSO}_{4} \rightarrow \mathrm{Ca}^{2+}+\mathrm{SO}_{4}^{2-}(2-2)\)
CHXII03:ELECTROCHEMISTRY
330455
Which out of the following is a correct equation to show change in molar conductivity with respect to concentration for a weak electrolyte, if the symbols carry their usual meaning?
330456
Assertion : Specific conductance decreases with dilution whereas equivalent conductance increases. Reason : On dilution, number of ions per millilitre decreases but total number of ions increases considerably.
1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but Reason is correct.
Explanation:
On dilution, number of ions per millilitre decreases. Total number of ions increases only in case of weak electrolytes. So, option (3) is correct.
330454
For a strong electrolyte, a plot of molar conductivity against (concentration) \({\mathrm{{ }^{1 / 2}}}\) is a straight line, with a negative slope, the correct unit for the slope is
For strong electrolyte, \({\mathrm{\Lambda_{m}=\Lambda_{m}^{\circ}-A \sqrt{C}}}\) \(\begin{aligned}& \text { Slope, } \mathrm{A}=\dfrac{\Lambda_{\mathrm{m}}^{\circ}-\Lambda_{\mathrm{m}}}{\sqrt{\mathrm{C}}} \\& \begin{aligned}\therefore \text { Units of } \mathrm{A} & =\dfrac{\mathrm{S} \cdot \mathrm{cm}^{2} \cdot \mathrm{mol}^{-}}{\left.\left(\mathrm{mol}^{-} \cdot \mathrm{lit}\right)^{-}\right)^{\frac{1}{2}}} \\& =\mathrm{S\,cm}^{2} \mathrm{~mol}^{-3 / 2} \mathrm{~L}^{1 / 2}\end{aligned}\end{aligned}\) So, the correct option is (4).
JEE Main - 2024
CHXII03:ELECTROCHEMISTRY
330470
\(\mathrm{NaCl}, \mathrm{MgCl}_{2}\) and \(\mathrm{CaSO}_{4}\) are known as:
1 1-1,2-1,2-2 type of electrolytes respectively.
2 Strong, weak and strong electrolytes respectively.
3 Electrolytes with different value of A.
4 Electrolytes with same molar conductivity.
Explanation:
Depending on the charges on the cation and anion produced in the dissociation of the electrolyte in solution, the type of electrolytes are known as \(1-1,2-1\) and \(2-2\) electrolytes respectively. \(\mathrm{NaCl} \rightarrow \mathrm{Na}^{+}+\mathrm{Cl}^{-}(1-1)\) \(\mathrm{MgCl}_{2} \rightarrow \mathrm{Mg}^{2+}+2 \mathrm{Cl}^{-}(2-1)\) \(\mathrm{CaSO}_{4} \rightarrow \mathrm{Ca}^{2+}+\mathrm{SO}_{4}^{2-}(2-2)\)
CHXII03:ELECTROCHEMISTRY
330455
Which out of the following is a correct equation to show change in molar conductivity with respect to concentration for a weak electrolyte, if the symbols carry their usual meaning?
330456
Assertion : Specific conductance decreases with dilution whereas equivalent conductance increases. Reason : On dilution, number of ions per millilitre decreases but total number of ions increases considerably.
1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but Reason is correct.
Explanation:
On dilution, number of ions per millilitre decreases. Total number of ions increases only in case of weak electrolytes. So, option (3) is correct.
330454
For a strong electrolyte, a plot of molar conductivity against (concentration) \({\mathrm{{ }^{1 / 2}}}\) is a straight line, with a negative slope, the correct unit for the slope is
For strong electrolyte, \({\mathrm{\Lambda_{m}=\Lambda_{m}^{\circ}-A \sqrt{C}}}\) \(\begin{aligned}& \text { Slope, } \mathrm{A}=\dfrac{\Lambda_{\mathrm{m}}^{\circ}-\Lambda_{\mathrm{m}}}{\sqrt{\mathrm{C}}} \\& \begin{aligned}\therefore \text { Units of } \mathrm{A} & =\dfrac{\mathrm{S} \cdot \mathrm{cm}^{2} \cdot \mathrm{mol}^{-}}{\left.\left(\mathrm{mol}^{-} \cdot \mathrm{lit}\right)^{-}\right)^{\frac{1}{2}}} \\& =\mathrm{S\,cm}^{2} \mathrm{~mol}^{-3 / 2} \mathrm{~L}^{1 / 2}\end{aligned}\end{aligned}\) So, the correct option is (4).
JEE Main - 2024
CHXII03:ELECTROCHEMISTRY
330470
\(\mathrm{NaCl}, \mathrm{MgCl}_{2}\) and \(\mathrm{CaSO}_{4}\) are known as:
1 1-1,2-1,2-2 type of electrolytes respectively.
2 Strong, weak and strong electrolytes respectively.
3 Electrolytes with different value of A.
4 Electrolytes with same molar conductivity.
Explanation:
Depending on the charges on the cation and anion produced in the dissociation of the electrolyte in solution, the type of electrolytes are known as \(1-1,2-1\) and \(2-2\) electrolytes respectively. \(\mathrm{NaCl} \rightarrow \mathrm{Na}^{+}+\mathrm{Cl}^{-}(1-1)\) \(\mathrm{MgCl}_{2} \rightarrow \mathrm{Mg}^{2+}+2 \mathrm{Cl}^{-}(2-1)\) \(\mathrm{CaSO}_{4} \rightarrow \mathrm{Ca}^{2+}+\mathrm{SO}_{4}^{2-}(2-2)\)
CHXII03:ELECTROCHEMISTRY
330455
Which out of the following is a correct equation to show change in molar conductivity with respect to concentration for a weak electrolyte, if the symbols carry their usual meaning?
330456
Assertion : Specific conductance decreases with dilution whereas equivalent conductance increases. Reason : On dilution, number of ions per millilitre decreases but total number of ions increases considerably.
1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but Reason is correct.
Explanation:
On dilution, number of ions per millilitre decreases. Total number of ions increases only in case of weak electrolytes. So, option (3) is correct.
