Chapter 2: Class 7 Science Exam Tests
Class 7 Science MCQs - Chapter 2
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MCQ 186: The positive ion is known as
MCQ 187: The symbol of "Hydrogen" is
MCQ 188: When "Uranium-238" is bombarded with neutrons, it produces
MCQ 189: Some nuclear power plants use an artificial isotope instead of uranium. This isotope is known as
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