https://www.getmyuni.com/exams/cucet-mock-sample-tests
This is the link for CUCET syllabus.
You've asked syllabus for MSc entrance exam but you didn't mention name of the examination or the institution which you are interested in. So I've given the link where you can download the syllabus for CUCET MSc environmental science. Do your best... for every hard work there is a fruit.
ALL THE BEST