Chapter 7: Class 10 Chemistry Exam Tests
Class 10 Chemistry MCQs - Chapter 7
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MCQ: The ratio of hydrogen (H) and oxygen (O) in water molecule by volume is
MCQ: What is the fourth step of raw water treatment?
MCQ: The hardness that cannot be removed by boiling is called
MCQ: The density of water becomes maximum at
MCQ: Step of sewage water treatment in which sewage is placed in tanks and aerated with large blowers is called
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