Certainly! Let's analyze each of the given reactions step-by-step based on the activity series:
1. Reaction: [tex]\( \text{Pt} + \text{FeCl}_3 \)[/tex]
- Activity series: [tex]\( \text{Fe} (\text{Iron}) > \text{Pt} (\text{Platinum}) \)[/tex]
- Since platinum ([tex]\(\text{Pt}\)[/tex]) is less reactive than iron ([tex]\(\text{Fe}\)[/tex]), platinum cannot displace iron from iron(III) chloride ([tex]\(\text{FeCl}_3\)[/tex]).
- Result: No reaction.
2. Reaction: [tex]\( \text{Mn} + \text{CaO} \)[/tex]
- Activity series: This is not a displacement reaction but rather involves a metal ([tex]\(\text{Mn}\)[/tex]) and a metal oxide ([tex]\(\text{CaO}\)[/tex]).
- Displacement reactions generally involve a reactive metal displacing a less reactive metal from a compound.
- Since manganese ([tex]\(\text{Mn}\)[/tex]) reacting with calcium oxide ([tex]\(\text{CaO}\)[/tex]) does not fall under typical displacement rules, no specific reactivity is indicated.
- Result: No reaction.
3. Reaction: [tex]\( \text{Li} + \text{ZnCO}_3 \rightarrow \)[/tex]
- Activity series: [tex]\( \text{Li} (\text{Lithium}) > \text{Zn} (\text{Zinc}) \)[/tex]
- Lithium ([tex]\(\text{Li}\)[/tex]) is more reactive than zinc ([tex]\(\text{Zn}\)[/tex]). Therefore, lithium can displace zinc from zinc carbonate ([tex]\(\text{ZnCO}_3\)[/tex]).
- Balanced chemical reaction: [tex]\( 2 \text{Li} + \text{ZnCO}_3 \rightarrow \text{Li}_2\text{CO}_3 + \text{Zn} \)[/tex]
- Result: Reaction will occur.
4. Reaction: [tex]\( \text{Cu} + 2 \text{KNO}_3 \)[/tex]
- Activity series: [tex]\( \text{K} (\text{Potassium}) > \text{Cu} (\text{Copper}) \)[/tex]
- Copper ([tex]\(\text{Cu}\)[/tex]) is less reactive than potassium ([tex]\(\text{K}\)[/tex]), so copper cannot displace potassium from potassium nitrate ([tex]\(\text{KNO}_3\)[/tex]).
- Result: No reaction.
After evaluating each given reaction, we find that the most likely reaction that will occur is:
Reaction: [tex]\( \text{Li} + \text{ZnCO}_3 \)[/tex]
Given the analysis, the correct answer is:
3
