Class 6 science Practice Tests
Class 6 Science Online Tests
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MCQ 1: Hydrogen is also used in
MCQ 2: Oxygen gas is a gas that possesses about half of the mass of
MCQ 3: It is used to make fertilizers, lead-acid batteries, and in many industrial processes and is called
MCQ 4: Gas used in electrical generators as a rotor coolant is
MCQ 5: This is a silvery-white, lightweight metal, it is soft and malleable and is called
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