Is there Any App to Provide Free Video Lectures with So Many Types Of?

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Is there any app to provide free video lectures with so many types of extra question and which Allen and Akash provide and deep study material booklet PDF to focus on conceptual and practical learning?

If we talk about app trust me there are no such apps but some little initiative are made by byjus for clearing basics but that could be achieved by reading ncert books and dpp's of various institutes . For physics - physics galaxy on YouTube might be good option for u .

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With English subtitles). For chemistry, this is the book I always refer to : For Physics 2 : ???? Chemical physics — I have a book from Caltech on Chemistry for Physics students. For Chemistry — this is a useful guide : For Physics — Physics 4, Physics 10 etc are all good books.