Physical and Chemical Changes Quiz App Download | Class 7 Science PDF e-Book
Class 7 Science MCQs: Chapter 17
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The Physical and chemical changes Quiz Questions and Answers PDF (Physical and Chemical Changes Quiz PDF e-Book) download Ch. 17-19 to learn Class 7 Science Course. Solve Making Ammonia MCQs PDF, Physical and Chemical Changes Quiz Questions and Answers to study online school courses. The Physical and Chemical Changes Quiz App Download: Free Class 7 Science App to learn making ammonia, solids liquids and gases, iron and sulphur, burning fuels test prep for online school and college.
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Nitrogen is obtained from
The reason of low density of gases is
The reaction that gives out heat, while taking place is known as
The 'volume' of gases is
The compounds made up of hydrogen and carbon are known as
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