A process in which substances interact to form new substances.

An emotional response to an event.

किसी घटना पर भावनात्मक प्रतिक्रिया।

English Usage: Her reaction to the news was unexpected.

Hindi Usage: खबर पर उसकी प्रतिक्रिया अप्रत्याशित थी।

Capable of being reversed or changed back to the original state.

Referring to a situation that can be modified or undone.

ऐसी स्थिति का संदर्भ जो संशोधित या रद्द की जा सकती है।

English Usage: The reversible decisions gave them flexibility in their planning.

Hindi Usage: उलटने योग्य निर्णयों ने उन्हें उनकी योजना में लचीलापन दिया।