Hi,
There is no reservation for OBC category in PEC, Chandigarh. and 100 is very less to get CSE and Mechanical branch in PEC, Chandigarh under general category.

Your expected Rank based on your score will be approx 100000 and your OBC- NCL category rank will be between 24000-25000.
Also, You can use the below JEE Main college predictor link to know what all colleges you can get.

JEE MAIN College Predictor

Good Luck!

Your expected category rank will be around 24,000.

You have less chances in PEC University based on your marks.

To check which colleges you can get based on your marks/rank you can use below college predictor

Click on the below link

JEE Main College Predictor

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