Chemistry, the branch of science that deals with the composition, structure, properties, and reactions of matter.

Chemical substance, a form of matter that has consistent chemical composition.

रसायन विज्ञान

English Usage: Chemistry is essential for understanding many scientific fields.

Hindi Usage: रसायन विज्ञान कई वैज्ञानिक क्षेत्रों को समझने के लिए आवश्यक है।

Experimental chemical, a substance being tested or studied in experiments.

प्रायोगिक रसायन

English Usage: They discovered a new experimental chemical in the lab.

Hindi Usage: उन्होंने प्रयोगशाला में एक नया प्रायोगिक रसायन खोजा।