BITSAT 2021
- Exam
- BITSAT
- Year
- 2021
- Subject
- Chemistry
- Chapter
- Electrochemistry
BITSAT 2021 · Chemistry · Electrochemistry
At 25^ ^ C , the molar conductance at infinite dilution for the...
At , the molar conductance at infinite dilution for the strong electrolytes and are and respectively. in is
Options
- A
- B
- C
- D
Correct answer
B.
Step-by-step solution
\Delta_{\mathrm{Na}^{+}}^{{}^{\circ}}+\Delta_{\mathrm{OH}^{-}}^{{}^{\circ}}=248 \times 10^{-4} \mathrm{Sm}^{2} \mathrm{ mol}^{-1}\Delta_{\mathrm{Na}^{+}}^{{}^{\circ}}+\Delta_{\mathrm{Cl}^{-}}^{{}^{\circ}}=126 \times 10^{-4} \mathrm{Sm}^{2} \mathrm{ mol}^{-1}\Delta_{\mathrm{Ba}^{{}^{\circ}}{ }^{2+}+\Delta{ }_{2 \mathrm{Cl}^{-}}^{{}^{\circ}}=280 \times 10^{-4} \mathrm{Sm}^{2} \mathrm{ mol}^{-1}\mathrm{NoW}, \Delta_{\mathrm{Ba}(\mathrm{OH})_{2}}^{{}^{\circ}}=\Delta_{\mathrm{BaCl}_{2}}^{{}^{\circ}}+2 \Delta{ }^{{}^{\circ}}{ }_{\mathrm{NaOH}^{{}^{\circ}}-2 \Delta{ }_{\mathrm{NaC} 1}^{{}^{\circ}}\Delta{ }_{\mathrm{Ba}(\mathrm{OH})_{2}}^{{}^{\circ}}=280 \times 10^{-4}+2 \times 248 \times 10^{-4}-2 \times 126 \times 10^{-4}\Delta_{\mathrm{Ba}(\mathrm{OH})_{2}}^{{}^{\circ}}=524 \times 10^{-4} \mathrm{Sm}^{2} \mathrm{ mol}^{-1}