Chapter 2: Class 7 Science Exam Tests
Class 7 Science MCQs - Chapter 2
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MCQ 21: An atom is electrically
MCQ 22: Large molecules such as polythene and polystyrene contains
MCQ 23: The valency of 'zinc' is
MCQ 24: The ionic chemical formula of 'chlorine' is
MCQ 25: John Dalton carried out his experiment about atom in
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