Question

During electrolysis, ${Al}^{+3}$ molecules are formed at cathode and $O_2$ is formed at anode.

Rectify the error in the above statement.

• A. ${Al}^{+3}$ polyatomic ion
• B. ${Al}^{+3}$ ion
• C. ${Al}^{+3}$ atom
• D. No error

Answer 1

The correct option is B

${Al}^{+3}$ ion

The error is ${Al}^{+3}$ molecules.

${Al}^{+3}$ is an ion. Once the ${Al}^{+3}$ ions reach cathode, they gain electrons and are deposited as pure metal. The process is better known as reduction.