Consider the following equation: Ag+ (aq) + CI-(aq) → Ag+CI- (s) ; ∆H = _65.7 kJmol-1. From the equation, it can be deduced that
A direct combination is involved and the reaction is endothermic
B a solid is formed and heat is evolved
C activation energy is high and a catalyst is required
D the reaction is endothermic and occurs at high temperature
Answer is B
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