JAMB Chemistry 2010 Objective — Question 26
Question 26 of 50 from the Joint Admissions and Matriculation Board (JAMB) Chemistry 2010 Objective paper, with the correct answer and a full explanation.
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26. In which of the following is entropy change positive? A. Addition of concentrated acid to water B. Dissolution of sodium metal in water C. Thermal dissociation of ammonium chloride D. Reaction between an acid and a base
- A. Addition of concentrated acid to water
- B. Dissolution of sodium metal in water
- C. Thermal dissociation of ammonium chlorideCorrect
- D. Reaction between an acid and a base
Explanation
The thermal dissociation of ammonium chloride (a solid decomposing into gases) shows an increase in disorder, giving a positive entropy change.
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