Hello ,

You will not be eligible to get admission for MTech as you don't hold graduation for BTech. There is the learning path and it is unique for different degree.  For example:-

10th-> 12th-> BE/BTech-> MTech(Specialization)-> PhD(research)-> job.

Job option is also available after UG and PG course completion. If you have done MSc in chemistry then you should look for job options or do PhD for your interested domain . There is no provision to get an admission for MTech after MSc.

Hope it helps!