WAEC - Chemistry (2020 - No. 26)
Which of the following reactions are always exothermic? 1. Neutralization Il. Decomposition III. Combustion
I and II only
I and III only
II and IIl only
I, II and III
Giải thích
- 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.