Question

When aqueous solution of NaCl is electrolyzed……

a. Cl2 is evolved at the cathode b. H2 is evolved at cathode
c. Na is deposited at the cathode d. Na appears at the anode

Answer 1

a. Cl2 is evolved at the cathode

Step-by-step explanation:

When an aqueous solution of NaCl (table salt) is electrolyzed, the positively charged ions, Na+, move to the anode while the negatively charged ions, Cl-, move to the cathode. At the anode, the Na+ ions lose electrons, resulting in the formation of Na atoms which then combine with other elements in the solution. At the cathode, the Cl- ions gain electrons, forming chlorine gas (Cl2) which is evolved as a gas.