After btech in information technology does i have a chance to do mtech in mechanical engineering
Yes, definitely you have full choices to change your branch after completing your bachelor of Technology to take ad3in master of technology. So you don't have to worry about these things. But I would like to tell this is not considered a good idea to change from information technology or computer science engineering to mechanical engineering in M. Tech. Although you have choices.
Good luck for your future.
Feel free to ask if you have any further queries.