Chapter 2: Class 7 Science Exam Tests
Class 7 Science MCQs - Chapter 2
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MCQ 51: Isotopes behave the same way in
MCQ 52: In methane gas, each carbon atom is bonded with
MCQ 53: Oxygen is a diatomic gas so its chemical formula is
MCQ 54: The atomic number of helium is
MCQ 55: The atomic number of hydrogen is
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