Question

In Hall and Heroult's process, products liberated at anode and cathode are ______

Options

• oxygen

• carbon monoxide

• carbon dioxide

• all of these

Answer 1

all of these

Explanation:

Aluminum is liberated at the cathode in Hall and Heroult's process, whereas the oxygen evolved at the anode combines with the carbon of the anode to produce carbon monoxide, which either bums to carbon dioxide or escapes.