Hello Aspirant...

The CBSE board practical exam for class 12th lasts three hours. There is a written round in which you must write the experiment that has been handed to you, followed by a round in which you must do the experiment that you have written in your answer sheet. By carrying out the experiment, you are obligated to record the final readings that you discover. Following that, you will have a viva in which the examiner will ask you questions on both your experiment and your course. All of this can be completed in under three hours. After the viva, you will be free of it and may go home after consulting with your teacher.

This practical test has a total of 30 points.

I hope this helps.

Regards.