Hello,
Firstly make short notes of that topic Or underline the important points in NCERT book.Then try to write and practice it several times.Don't try to memorise it.Practice examples and learn the topics.You have to be very confident while attempting the questions...
If you can practice then no need to worry about inorganic chemistry.You can also refer to book like OP Tondon for getting more concepts.
Good luck.

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