It won't die, cobras are completely immune to its own venom when bitten by another specimen of the same species but highly susceptible to venom of snakes of other species. However many venomous snakes have highly resistance to a high quality of the same type venom. read more
Since one cobra is immune from its venom the answer is nothing will happen . The bitten snake will have two puncture wounds that may be a locus for opportunistic infections . read more
Consider: an adult king cobra can get up to 18 feet and can kill a 12,000 pound elephant with one bite. Takes about three hours for the animal to die. So an 18 inch baby can easily kill a 200 pound person within an hour. read more
If a venomous snake is a snake eater like a King Cobra it bites the prey snake, waits for it to die, and then eats it. 1) Just like any other creature that is bitten it will die if the dose of venom is large enough. read more
(King Cobra: King Cobra | The King of Venomous Snakes) You will almost certainly die if bitten by an adult king cobra. It will not be an easy death. The neurotoxic venom disrupts communication between nerve cells, bringing about paralysis of muscles around the lungs and disturbing cardiac rhythm. read more