This post is about the Chemistry Board.
According to me, To score 90+ in Board Exam you must solve XAM IDEA BOOK.
This Book divides into various sections according to the latest CBSE papers
Link of this book is given at the end
About the XAM IDEA:
Xam idea is a complete exam preparation system for secondary and senior classes.
Xam idea is a comprehensive exam preparation system for secondary and senior classes. It is strictly according to the latest revised CBSE syllabi and examination pattern.
Knowledge-based questions – to know specific terms, concepts, identify, define information.
High Order Thinking Skills based questions to analyze, classify, compare, contrast, or differentiate between unique pieces of information from a variety of sources.
Application-based questions to apply knowledge to new situations from abstract information in concrete situations.
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