the rate at which a chemical reaction occurs

a response to an event or stimulus

किसी घटना या उत्तेजना का उत्तर

English Usage: His reaction rate to the news was surprisingly calm.

Hindi Usage: समाचार पर उसकी प्रतिक्रिया की दर आश्चर्यजनक रूप से शांत थी।

to act in response to something

to undergo a chemical change due to a stimulus

उत्तेजना के कारण रासायनिक परिवर्तन में जाना

English Usage: Metals often react with acids to produce gas.

Hindi Usage: धातुएं अक्सर एसिड के साथ प्रतिक्रिया करके गैस उत्पन्न करती हैं।