Hello Saniya,

NO, it is not necessary. 

For Nirma, eligibilty is:

(a)Candidate should have appeared JEE (Main) 2019.

(b) Candidate must have passed 12th Science Examination with two compulsory subjects of Physics & Mathematics and one optional subject (Chemistry or Biology or Computer or Vocational Subject) from single board, along with the minimum percentage of marks as to be decided by the Government of Gujarat under the rules of admission 2019.

http://www.nirmauni.ac.in/itnu/btechadmission

For DAIICT, Eligibilty is:

(a)Selection of candidates in B.Tech program is done on the basis of JEE Main 2019.

(b)Minimum eligibility for B.Tech is pass in 10+2 examination with Mathematics and Physics as compulsory subjects and any of the Chemistry/Biotechnology/ Computer Science/Biology.

https://engineering.careers360.com/articles/daiict-b-tech-admission