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what is chemistry.


the scientific study of the structure of substances and what happens to them in different conditions or when mixed with each other.


पदार्थों की संरचना तथा विभिन्न परिस्थितियों अथवा एक-दूसरे के साथ मिलाने पर उनमें होनेवाले परिवर्तनों का वैज्ञानिक अध्ययन; रसायनशास्‍त्र

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