Some of the tough subjects as per the information available are-

• ENGINEERING MATHEMATICS
• ENGINEERING MECHANICS
• ENGINEERING FLUID MECHANICS
• BIOPROCESS ENGINEERING

Mainly this subjects are felt difficult to the student who have PCB in there 10+2 and not Mathematics in 10+2. The main problem with this subjects is its numerical and physical approach. So if you have weakness in mathematics/physics, then this subject can feel hard to you. Although, if you study well this subjects then you will be able to score well.

For more information regarding BTech in Biotechnology consider the link below:

https://www.careers360.com/courses/b-tech-in-biotechnology

I hope this helps. Wish you a great eve!