Which metal is the second most abundant metal found on Earth?

Which among the following statements is incorrect for magnesium metal?

An alloy is

State whether the following statement is true or false:
$A$ solution of an ionic compound in water contains ions,which move to the opposite electrodes when electricity is passed through the solution.

Which of the following is an alloy?

State whether the following statement is true or false:
At ordinary temperature,the surfaces of metals such as magnesium,aluminium,zinc,lead,etc.,are covered with a thin layer of oxide which prevents the metal from further oxidation.