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For identifying which questions are important for class 10th standard science quarterly exam you will have to solve the question papers of previous year in order to understand the pattern of questions and weightage of chapters.

You can refer to our website by this link and then download the science question paper https://school.careers360.com/download/ebooks/tamil-nadu-class-10-quarterly-science-question-paper-2025-26

Practicing a number of questions daily will definitely give you an insight of important questions and you will be able to solve them during your actual exam.