Hello Mohammad,

Yes you can pursue Bcom even after studying science in your +2. Mostly colleges conduct an entrance exam which is based on school level English and maths and little bit of logical reasoning as well.

During bcom the subjects like Taxation, audit and management courses are new even for commerce students. So there you are at part with other students.
In the subject of mathematics you might have an advantage due to your science field.
The only problem you might face would be in accountancy. Although even that can be managed with some extra tution and hard work and dedication from your end.

So all in all it will require extra efforts from your end but is definitely manageable and shouldn't be an hindering factor if you are inclined towards this field.

Hope this helps in making your decision.
All the best!

Hello aspirant,
Yes you can take admission in B.com.As the basic eligibility required for B.Com. degree in Professional students must have successfully passed 12th Standard/HSC/10+2 (or equivalent Level of Examination) from any recognized Board.
Yes , you might encounter some problems.
Class 11 and 12 is base or foundation for further related degrees. So you need to have strong base for building further floors.
Again it depends on your will. You are switching subjects that seems you are interested for commerce .
Hope it helps,thank you.