In chemistry, a more reactive metal can displace a less reactive metal from its compound in a displacement reaction; by analyzing which metals react with which compounds, students can determine the relative reactivity order of metals, with the most reactive metal being able to displace all others and reacting most vigorously with cold water at room temperature.
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2026 GCE Science Paper 2 Predicted Metals Exam Questions
Added:As you're going to write your science paper two, you need to know this information about metals because this is an important topic in science paper two, in the in in section A and section B. This is a very important because they ask a lot about metals. So, they sometimes they won't just tell you that when this and this happen, reacts.
This metal reacts with this compound, what will be the result? They want you to apply this knowledge.
Now, the letters are the the question was saying, "The letters W, X, Y, and Z refer to four different metals found in nature. The letters used are not actual symbols of metals. The following information was obtained." So, the question was says, "W when it react with X, there was no reaction." So, that means X was more reactive than W. No wonder the reaction was was not able to take place. It It's a more reactive metal it It It replaces It replaces a less reactive metal. So, here when you Y and X, the reaction would took place. That means Y Y is more reactive than X. And X is more reactive than W. That means Y is more reactive than X and W.
Then Z, it reacted with W, it replaces W. That means Z is is more reactive than W again.
When you go to Z, it reacted with X, there was no reaction. That means X is more reactive than Z.
So, what it means, W was the least reactive metal.
Then Z, it failed to to replace X.
But here Y, it replaced X. That means Y is the most reactive. Then the least reactive is is it W. So, the question say, "List the metals given given using the letters in ascending order of reactivity."
Ascending order, that means you have to write them starting with the least reactive to the most reactive.
But, if they said descending, you like it you write them from the most reactive to the least reactive. You are just to be decreasing. So, now the most The least reactive was W. W never replaced any metal here.
Then when you look at uh Z was able to replace W, but it failed to replace C X.
Then X was replaced by by Y. So, that means Z is the second least uh least reactive. Then you followed by X because it was replaced by Y.
No No No letter replaced the Y. So, Y it was the most reactive metal.
Identify the type of chemical reaction that has occurred. So, we are going to say it is a displacement reaction.
A more reactive metal replaces the least reactive metal from its compound. So, this is a displacement displacement displacement reaction.
Then the last question was saying, "Using the letters X, Y, and Z, identify a metal which will react very vigorously uh with cold water at room temperature and the pressure." So, we are going to say this most reactive metal is the one that is going to react with heat uh very vigorous with cold water at room temperature and water.
This what you need to understand is that uh the thing is that >> [clears throat] >> uh is that why is the most reactive metal? So it reacts most uh most vigorously with cold water.
So uh thank you very much for having my time.
Don't forget to subscribe for more uh exam preparation and prediction questions. See you in the next video.
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