Good Afternoon

Hope you are fine..

As per your query, Yes!! you will be eligible to get admission in Jadavpur University with 68% in 12th board.

The minimum eligibility criteria for B.Tech course is that you should have passed 10+2 in Physics , Mathematics and Chemistry with a minimum of 60% from any recognised institute.
If you are belonging from ST, SC, OBC-A, OBC-B, PWD category you are required to secure a minimum of 45% you must obtained 60% marks in Mathematics .

For SC, ST, OBC-A, OBC-B, PWD minimum 45% of marks is required in mathematics.

If you want to apply in B.Arch course, you must have completed 10+2 in Physics, Maths and Chemistry with a minimum of 50% of marks from any recognised board or council.

For more information about Jadavpur University eligibility criteria checkout given link below:
https://www.careers360.com/university/jadavpur-university-kolkata/admission

Hope you found it helpful
All the best!!!