Chapter 7: Class 7 Science Exam Tests
Class 7 Science MCQs - Chapter 7
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MCQ 16: Electrolysis is also used to purify
MCQ 17: The electrolyte used in the purification of copper is
MCQ 18: The strength of electromagnet can be increased by introducing a soft iron core
MCQ 19: For current to flow, the circuit should be
MCQ 20: Electric companies charge for
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