Question

Consider the reaction A + B C + D. If the blue solution decolourises on heating, the reaction is –

• A. Endothermic
• B. Exothermic
• C. 'A' is stable at room temperature
• D. the reaction does not obey Le chatelier principle

Answer 1

Answer: (B)

Exothermic

Answer 2

Reaction is exothermic, hence on heating equilibrium shifts in backward direction so blue colour disappears.