Did the NCERT book is sufficient to cross50to60marks in chemistry &yes than how please guide
dear student
Study the concepts from ncert. Solve all the exercises and examples. For reference,you should solve the previous year question papers.
Chemistry is based on memory and observation . So you should have a good range of memory
In my opinion , NCERT is enough if you cover it nicely and revise it thoroughly.
hope it helps
All the best!!!

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