Hello there

Both of them has its own merits and it also depends upon the subject you are interested in .You can do best in any of the subject you like .Now personally for me I think bsc physical sciences with chemistry would do better .As the subject are relatable and will help you in msc entrance exams .Here is a similar answer which might help you to know better about this course .

https://www.google.com/amp/s/dqxeclau.top/question-what-is-physical-science-with-chemistry-in-bsc-and-its-scopes/amp

Since these were my views so you should not completely rely on it .Try comparing more between these two subjects .As some also says computer science is better as it has more scope for getting a good job