A series or sequence of actions or reactions that follow one after another, often in a repeating or cyclic manner.

प्रतिक्रियाओं का चक्र

English Usage: The cycle of reaction in the economy was difficult to predict.

Hindi Usage: अर्थव्यवस्था में प्रतिक्रियाओं का चक्र भविष्यवाणी करना कठिन था।