No one has ever failed in honors in all the subjects. Most students tend to fail in chemistry, but this also varies a lot. Let me discuss some of the possible reasons, which may answer your question.

Failed to Qualify for Honours:

• If you score below 40% in your honors subject, chances are you will lose it.
• In this situation, you can either try to repeat another year or proceed with B.Sc. General.

Qualified for Honours but failed in any/both general subjects:

• This happens when you get a score lower than 25% in the general subjects.
• For this, the board conducts a supplementary exam, passing which you will be able to continue without any year loss.

Failing in both Honours and General subjects:

• This scenario is not seen very often.
• But if you fail in every subject, you have to start again from the beginning, next year.
• If you fail consecutive years, then the college might give you a Termination Certificate.

Finally, it is really important to know that a student has to complete his or her graduation within 5 years, failing which your registration will be canceled.