Chapter 4: Class 9 Chemistry Exam Tests
Class 9 Chemistry MCQs - Chapter 4
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MCQ 21: Physical properties depend on the
MCQ 22: Elements that lie in the same column have
MCQ 23: As we go from left to right across the period, the electron affinity
MCQ 24: Elements are arranged in order of
MCQ 25: The decrease in the force of attraction between valence electrons and nucleus by inner electrons is called
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