Chemistry
WAEC 2020
Which of the following reactions are always exothermic? 1. Neutralization Il. Decomposition III. Combustion
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A.
I and II only
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B.
I and III only
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C.
II and IIl only
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D.
I, II and III
Correct Answer: Option B
Explanation
- LIST OF EXOTHERMIC REACTIONS
- any combustion reaction.
- a neutralization reaction.
- rusting of iron (rust steel wool with vinegar)
- the thermit reaction.
- reaction between water and calcium chloride.
- reaction between sodium sulfite and bleach (dilute sodium hypochlorite)
- reaction between potassium permanganate and glycerol.
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