an action performed or a feeling experienced in response to a situation or event

a chemical change or a physical response

एक रासायनिक परिवर्तन या एक भौतिक प्रतिक्रिया

English Usage: The scientist observed the reaction pulse during the experiment.

Hindi Usage: वैज्ञानिक ने प्रयोग के दौरान प्रतिक्रिया पल्स को देखा।

to act in response to something

to undergo a chemical reaction

एक रासायनिक प्रतिक्रिया का सामना करना

English Usage: When mixed, the substances will react.

Hindi Usage: जब मिश्रित किया जाएगा, तो पदार्थ प्रतिक्रिया करेंगे।