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Thee eligibility criteria for CSIR NET is passed master's degree in the relevant discipline from a recognized university securing 55% aggregate, there is relaxation of 5% for reserved categories, if you have the required aggregate, and fulfill thee age criteria as in the upper age limit is 28 years for jrf, relaxation in terms of age criteria is offered to women candidates and reserved categories, there is no upper age limit for lecturer, you can apply for chemical science for CSIR NET, follow the official website at https://csirnet.nta.nic.in/ to know more details regarding this.