The product , which is not obtained during the electrolysis of brine solution is ____ .
- \(cl_2\)
- H2
- HCl
- NaOH
The Correct Option is B
Solution and Explanation
Electrolysis of Brine Products
Brine is a concentrated aqueous solution of \( \text{NaCl} \). During electrolysis of brine, the following reactions occur:
At the cathode (reduction):
Water molecules are preferentially reduced over sodium ions because the reduction potential of water is higher than that of sodium ions.
\( 2\text{H}_2\text{O(l)} + 2e^- \rightarrow \text{H}_2\text{(g)} + 2\text{OH}^-\text{(aq)} \)
At the anode (oxidation):
Chloride ions are oxidized to chlorine gas.
\( 2\text{Cl}^-\text{(aq)} \rightarrow \text{Cl}_2\text{(g)} + 2e^- \)
Overall Reaction:
Combining the cathode and anode reactions:
\( 2\text{NaCl(aq)} + 2\text{H}_2\text{O(l)} \rightarrow \text{H}_2\text{(g)} + \text{Cl}_2\text{(g)} + 2\text{NaOH(aq)} \)
Conclusion:
The products obtained during the electrolysis of brine are hydrogen gas (\( \text{H}_2 \)), chlorine gas (\( \text{Cl}_2 \)), and sodium hydroxide (\( \text{NaOH} \)). \( \text{HCl} \) is not formed.
Top Questions on Electrolysis
O\(_2\) gas will be evolved as a product of electrolysis of:
(A) an aqueous solution of AgNO3 using silver electrodes.
(B) an aqueous solution of AgNO3 using platinum electrodes.
(C) a dilute solution of H2SO4 using platinum electrodes.
(D) a high concentration solution of H2SO4 using platinum electrodes.
Choose the correct answer from the options given below :- JEE Main - 2025
- Chemistry
- Electrolysis
A solution of aluminium chloride is electrolyzed for 30 minutes using a current of 2A. The amount of the aluminium deposited at the cathode is _________
- JEE Main - 2025
- Chemistry
- Electrolysis
Electrolysis of 600 mL aqueous solution of NaCl for 5 min changes the pH of the solution to 12. The current in Amperes used for the given electrolysis is ….. (Nearest integer).
- JEE Main - 2025
- Chemistry
- Electrolysis
- Electron affinity is positive when:
- BITSAT - 2024
- Chemistry
- Electrolysis
- The pH of 0.5 L of 1.0 M NaCl solution after electrolysis for 965 s using 5.0 A current is:
- BITSAT - 2024
- Chemistry
- Electrolysis
Questions Asked in JEE Main exam
- The standard reduction potential values of some of the p-block ions are given below. Predict the one with the strongest oxidizing capacity.
- JEE Main - 2025
- Redox reactions
- Which one of the following forces cannot be expressed in terms of potential energy?
- JEE Main - 2025
- Work Power and Energy
- A positive ion A and a negative ion B has charges \(6.67 \times 10^{-19}\) C and \(9.6 \times 10^{-10}\) C, and masses \(19.2 \times 10^{-27}\) kg and \(9 \times 10^{-27}\) kg respectively. At an instant, the ions are separated by a certain distance \(r\). At that instant, the ratio of the magnitudes of electrostatic force to gravitational force is \(P \times 10^{-13}\), where the value of \(P\) is:
- JEE Main - 2025
- Electrical Circuits
- Let the shortest distance from \( (a, 0) \), where \( a > 0 \), to the parabola \( y^2 = 4x \) be 4. Then the equation of the circle passing through the point \( (a, 0) \) and the focus of the parabola, and having its center on the axis of the parabola is:
- JEE Main - 2025
- Circle and Parabola Geometry
- If the system of equations \[ 2x - y + z = 4, \] \[ 5x + \lambda y + 3z = 12, \] \[ 100x - 47y + \mu z = 212, \] has infinitely many solutions, then \( \mu - 2\lambda \) is equal to:
- JEE Main - 2025
- Linear Algebra