Hello,

Engineering science is bit deep and has different theories which is completely different which you read in 12th.

Basics is same but those are use to solve lot more real life problems.

Engineering mathematics and physics is mostly used in all engineering streams.

Engineering chemistry and physics is used in biotechnology engineering , chemical engineering, mechanical and aerospace engineering.

Science is basic rule for every process or thing or component. There is no domain or work for engineering mathematics, physics or chemistry. You can read them in BTech/BE and use them in your job time. Engineering has good scope and it's improving towards automations.

Hope it helps!