Hii there,
Dear candidate please refer to the books that you get in English or Hindi language, you can get online NCERT books whole. Not chapters in different pdf, that doesn't make difference. If you want online book, you can Google it and get it on various site. You can also get it here:
https://school.careers360.com/articles/ncert-books/amp#referrer=https://www.google.com
Thank you!!!
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