Yes, you can potentially apply for a BSc Computer Science program through CUET-UG, even if you received an RT in Chemistry, as long as your overall result is passed. Your overall pass status likely includes your additional subject.

Here's a breakdown:

CUET-UG Eligibility:

The basic eligibility for CUET-UG is a pass in your class 12 examination from a recognized board.

RT in Chemistry:

An RT (Reappear in Theory) in one subject doesn't necessarily disqualify you from higher education if your overall result is passed. This typically means you have an opportunity to retake the exam in that subject.

Overall Pass:

Your overall pass status, especially with an additional subject, means you've met the basic requirement for admission to most undergraduate programs.

CUET Subject Selection:

When you take CUET, you can choose which subjects you want to be tested in. If your university requires specific subjects for B.Sc. Computer Science, make sure to select those.