Chapter 18: Class 7 Science Exam Tests
Class 7 Science MCQs - Chapter 18
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MCQ 56: The plastic industry began in
MCQ 57: Two indefinite characteristics of gases are
MCQ 58: For combustion, the required gas is
MCQ 59: Mixing of iron and sulphur together brings
MCQ 60: Ammonia is made by mixing two gases. These gases are
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