Molar Conductivity with Concentration | Ch- 3 | Electrochemistry | Class -12/Chemistry/NEET/IITJEE

👌To the point FREE course of chemistry ✔for all the students Aiming 2025 & 26 NEET/IITJEE & CL-12 Hi everyone! I'm Sangeeta Khatri, your chemistry guide, and today, we're diving into a key concept from Electrochemistry – Molar Conductivity with Concentration. This is an essential topic for Class 12 students and appears frequently in competitive exams like NEET and IIT-JEE. 👍Just Topic No Time Pass 📚 Topics We'll Explore Together: What exactly is Molar Conductivity? How does Molar Conductivity relate to Concentration? What happens to conductivity when we dilute a solution? The importance of Kohlrausch’s Law Class 12 students gearing up for their board exams Those of you striving for top scores in NEET and IIT-JEE Anyone who wants to sharpen their Electrochemistry knowledge I hope you'll join me on this journey to master this topic! And don't forget to like, subscribe, and hit the bell icon to stay updated on more lessons and tips. Let's make chemistry fun and easy to understand! --------------------------20 Multiple Choice Questions on Molar Conductivity and Concentration:----------------- 1. Molar conductivity is defined as the conductivity of: A. 1 cm³ of the solution B. 1 L of the solution C. 1 mole of electrolyte dissolved in 1 L of solution D. 1 mole of solute dissolved in 1 cm³ of solution Answer: C 2. As the concentration of a strong electrolyte decreases, the molar conductivity: A. Increases B. Decreases C. Remains constant D. Becomes zero Answer: A 4. Molar conductivity increases sharply for which type of electrolytes on dilution? A. Strong electrolytes B. Weak electrolytes C. Non-electrolytes D. Nonelectrolytes Answer: B 5. The unit of molar conductivity is: A. S m² mol⁻¹ B. S m⁻¹ C. S cm mol⁻¹ D. S cm² mol⁻¹ Answer: D 6. Which of the following factors does NOT affect molar conductivity? A. Temperature B. Concentration C. Nature of the solvent D. Atomic number of the solute Answer: D 7. As the concentration of an electrolyte solution increases, the molar conductivity: A. Increases B. Decreases C. Remains constant D. First decreases, then increases Answer: B 8. Which of the following laws is used to calculate molar conductivity at infinite dilution? A. Raoult’s Law B. Faraday’s Law C. Kohlrausch’s Law D. Dalton’s Law Answer: C 9. Molar conductivity of a solution at infinite dilution is the sum of the:Electrochemistry | Class-12/Chemistry/NEET/IITJEE A. Conductivities of cations and anions B. Charges of cations and anions C. Masses of cations and anions D. Concentrations of cations and anions Answer: A 10. What happens to molar conductivity when the concentration of a weak electrolyte decreases? A. It decreases B. It increases sharply C. It remains the same D. It becomes zero Answer: B 11. The molar conductivity of a strong electrolyte at infinite dilution:Electrochemistry | Class-12/Chemistry/NEET/IITJEE A. Is zero B. Is infinite C. Can be calculated using Kohlrausch’s Law D. Cannot be calculated Answer: C 13. As concentration approaches zero, the molar conductivity of strong electrolytes:Electrochemistry | Class-12/Chemistry/NEET/IITJEE A. Decreases B. Increases C. Remains constant D. Approaches zero Answer: B 14. Which of the following is a weak electrolyte?Electrochemistry | Class-12/Chemistry/NEET/IITJEE A. NaCl B. HCl C. CH₃COOH D. KOH Answer: C 15. Molar conductivity of which electrolyte shows a sharp rise with dilution?Electrochemistry | Class-12/Chemistry/NEET/IITJEE A. NaCl B. H₂SO₄ C. CH₃COOH D. KOH Answer: C 16. At infinite dilution, the molar conductivity of acetic acid can be calculated by using:Electrochemistry | Class-12/Chemistry/NEET/IITJEE A. NaCl and CH₃COOH B. NaCl and HCl C. HCl and CH₃COONa D. NaOH and H₂SO₄ Answer: C 18. The conductivity of a solution is directly proportional to:Electrochemistry | Class-12/Chemistry/NEET/IITJEE A. Concentration B. Temperature C. Volume D. Pressure Answer: A 19. As concentration increases, the degree of dissociation of a weak electrolyte:Electrochemistry | Class-12/Chemistry/NEET/IITJEE A. Increases B. Decreases C. Remains constant D. Becomes zero Answer: B 20. Which of the following is the correct unit of molar conductivity? Electrochemistry | Class-12/Chemistry/NEET/IITJEE A. S cm B. S m² mol⁻¹ C. S cm² mol⁻¹ D. Ohm m² mol⁻¹ Answer: C These questions will help solidify the understanding of molar conductivity and how it varies with concentration, a crucial topic for both NEET and IIT-JEE aspirants. Ignore hashtags #MolarConductivity #Electrochemistry #Class12Chemistry #IITJEE #NEET #ChemistryConcepts #PhysicalChemistry #KohlrauschLaw #MolarConductivityWithConcentration #Electrolytes #NEETPreparation #IITJEEPreparation #ElectrochemistryClass12 #MolarConductivityExplained #StrongAndWeakElectrolytes #ConductivityVariation