Chapter 7: Class 7 Science Exam Tests
Class 7 Science MCQs - Chapter 7
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The process which involves in breaking down the element by passing electricity through it is called
Chinese thought that the number of elements were
Low densities, low melting, low boiling point and poor conductivity are found in
Air ships and balloons use gas called
A compound which yields in black solid, copper oxide and colorless gas carbon dioxide on heating, is
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