Hello Venusaivenu12012002,

Well, Sorry to say but you can't get float option after selecting slide option, (As written in Josaa Business rule 2020 : a candidate can change from float to slide/freeze and slide to freeze by online reporting.  Page 37) but I will suggest, wait till last round and then apply for CSAB round and arrange in your preferred manner, there are chances for you getting seat there, but no chance in josaa itself...

Last Year Csab round cutoff for MANIT bhopal, chemical engineering was 27193 for CSAB first round for Other State Quota Candidates...

Hope This Helps, feel free to ask any further query...