Hello,
Firstly, admission to BSc Hons in Chemistry In Panjab University will be done through PUCET UG for which application form isn't released yet.
Once registration link is activated at https://cetug.puchd.ac.in/ , you need to click on "online registration", and enter the required information by providing your email id and mobile number, afterwards sign in with your login id and password, enter personal, academic, communication and other relevant details, upload scanned signature and photo as per the required format along with scanned important documents, pay the requisite fee and submit the same, finally take a print out of few copies for future references.
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