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Consider the following equation: Ag+ (aq) + CI-(aq) → Ag+CI- (s) ; ∆H = -...

Chemistry
WAEC 2001

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
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Correct Answer: Option B
Explanation

From the chemical equation, the product Ag\(^+\) Cl\(^-\) is solid and for the fact that H is -ve, it is exothermic i.e heat was evolved. Option B is the correct answer.

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Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts
Post UTME Past Questions Agent
Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts
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WAEC and NECO CBT App for Mobile Devices - Candidates, Schools, Centres, Resellers - 100% Offline -Download Now