Question

which of the following statement is correct

a) electrolysis of dil. NaOH gives h2 at cathode & O2 at anode

b) electrolysis of H2So4 gives h2 at cathode & O2 at anode

c) electrolysis of aq KF solution gives F2 at cathode

d) None of these

Answer 1

the correct answer is -

b) electrolysis of H2So4 gives h2 at cathode & O2 at anode

Answer 2

The correct statement is (b) "Electrolysis of H2SO4 gives H2 at cathode & O2 at anode."

• A automatic chemical reaction is driven by an electric current through a process known as electrolysis.
• An electrolyte—a substance that conducts electricity when dissolved in water or molten—is exposed to an electric current during this procedure.
• Chemical reactions occur in the electrolyte, and the byproducts are deposition at the electrodes.

In the case of dilute NaOH, the electrolysis reaction results in the formation of hydrogen gas at the cathode and oxygen gas at the anode. The reaction can be represented as follows:

2H2O + 2e- → H2(g) + 2OH-(aq) at cathode

4OH-(aq) → 2H2O(l) + O2(g) + 4e- at anode

However, in the case of H2SO4, the reaction is different.

The electrolysis reaction results in the formation of hydrogen gas at the cathode and oxygen gas at the anode. The reaction can be represented as follows:

2H+ + 2e- → H2(g) at cathode

2H2O(l) → O2(g) + 4H+ + 4e- at anode

Therefore, statement (b) is the correct option. Statement (a) is incorrect because oxygen gas is formed at the anode during the electrolysis of dilute NaOH, not at the cathode. Statement (c) is also incorrect because F2 is not produced during the electrolysis of aqueous KF solution. Finally, statement (d) is incorrect because statement (b) is true.

To learn more about electrolysis from the given link.

https://brainly.in/question/4091003

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