Explain the difference between an electrochemical cell and electrolytic cell. State Kohlrausch's law and write its applications.
Explain the difference between an electrochemical cell and electrolytic cell. State Kohlrausch's law and write its applications.
Show Hint
Solution and Explanation
Step 1: Difference Between Electrochemical and Electrolytic Cells: Feature & Electrochemical Cell & Electrolytic Cell
Energy Conversion & Chemical to electrical & Electrical to chemical
Spontaneity & Spontaneous reaction & Non-spontaneous reaction
Example & Galvanic/Daniel cell & Electrolysis of NaCl
Step 2: Kohlrausch's Law: \[ \Lambda_m^0 = \lambda^0_+ + \lambda^0_- \] where \( \lambda^0_+ \) and \( \lambda^0_- \) are the limiting molar conductivities of cations and anions, respectively.
Step 3: Applications: - Used to calculate the molar conductivity of weak electrolytes. - Helps in determining dissociation constants of weak acids and bases.
Top Questions on Electrochemistry
- For a closed circuit Daniell cell, which of the following plots is the accurate one at a given temperature ?
- JEE Main - 2026
- Chemistry
- Electrochemistry
- Consider the following redox reaction taking place in acidic medium: \[ \mathrm{BH_4^- (aq) + ClO_3^- (aq) \rightarrow H_2BO_3^- (aq) + Cl^- (aq)} \] If the Nernst equation for the above balanced reaction is \[ E_{\text{cell}} = E^\circ_{\text{cell}} - \frac{RT}{nF}\ln Q, \] then the value of \(n\) is ________ (Nearest integer).
- JEE Main - 2026
- Chemistry
- Electrochemistry
- 500 mL of \(1.2\) M KI solution is mixed with 500 mL of \(0.2\) M \( \mathrm{KMnO_4} \) solution in basic medium. The liberated iodine is titrated with standard \(0.1\) M \( \mathrm{Na_2S_2O_3} \) solution in the presence of starch indicator till the blue colour disappears. The volume (in L) of \( \mathrm{Na_2S_2O_3} \) consumed is ________ (nearest integer).
- JEE Main - 2026
- Chemistry
- Electrochemistry
- 'x' is the product from propenenitrile + $SnCl_2/HCl$ followed by hydrolysis. 'y' is the product from but-2-ene by ozonolysis. Which product is not obtained when 'x' and 'y' react in alkali with heating?
- JEE Main - 2026
- Chemistry
- Electrochemistry
Electricity is passed through an acidic solution of Cu$^{2+}$ till all the Cu$^{2+}$ was exhausted, leading to the deposition of 300 mg of Cu metal. However, a current of 600 mA was continued to pass through the same solution for another 28 minutes by keeping the total volume of the solution fixed at 200 mL. The total volume of oxygen evolved at STP during the entire process is ___ mL. (Nearest integer)
Given:
$\mathrm{Cu^{2+} + 2e^- \rightarrow Cu(s)}$
$\mathrm{O_2 + 4H^+ + 4e^- \rightarrow 2H_2O}$
Faraday constant = 96500 C mol$^{-1}$
Molar volume at STP = 22.4 L
- JEE Main - 2026
- Chemistry
- Electrochemistry
Questions Asked in UP Board XII exam
- Answer the following questions in about 40 words each:
(b) What did Roosevelt say about fear in the lesson 'Deep Water'?- UP Board XII - 2025
- Literature
- The antonym of 'ancient' is
- UP Board XII - 2025
- Antonyms
- Change any one of the following into indirect speech:
(i) She said, "Brother, I shall give you my watch."- UP Board XII - 2025
- Direct And Indirect Speech
- If the sequence of one strand of DNA is written as follows: 5' - ATGC ATGC ATGC ATGC ATGC - 3', write down the sequence of the complementary strand in 3' → 5' direction.
- UP Board XII - 2025
- Genetics
- Write a note on Intra-Uterine Devices (IUD’s) and their applications.
- UP Board XII - 2025
- Reproductive Biology