Class 9 chemistry Practice Tests
Class 9 Chemistry Online Tests
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MCQ 1: Hair contains keratin proteins which are also present in nails and wool is an example of
MCQ 2: Biochemistry deals with
MCQ 3: Branch of chemistry dealing with the plantation and overcoming greenhouse effect is
MCQ 4: Which of the following is present in vinegar?
MCQ 5: A science that examines the material this universe contains and changes in them is called
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