In the electrolysis of molten $NaCl$,what happens at the anode?

During electrolysis of $NaCl$ solution,part of the reaction is $Na^{+} + e^- \to Na$. This is termed as

When an electric current is passed through a cell containing an electrolyte,positive ions move towards the cathode and negative ions move towards the anode. If the cathode is removed from the solution,what will happen?

The product,which is not obtained during the electrolysis of brine solution,is

During the electrolysis of copper sulphate aqueous solution using copper electrodes,the reaction taking place at the cathode is:

In electrolysis of aqueous $NaOH$ at $NTP$,$2.8 \ L$ of oxygen gas is liberated at the anode. The amount of gas liberated at the cathode will be ............ $L$.