The order of reactivity of five metals is P > Q > R > S...
The order of reactivity of five metals is P > Q > R > S > T. Which of the following reactions can occur spontaneously?
- A)\(T + P^+ \rightarrow T^+ + P\)
- B)\(Q + T^+ \rightarrow Q^+ + T\)
- C)\(R + Q^+ \rightarrow R^+ + Q\)
- D)\(T + R^+ \rightarrow T^+ + R\)
Correct Answer: B)\(Q + T^+ \rightarrow Q^+ + T\)
Explanation
In this question, you are given the reactivity order of five metals, which is P > Q > R > S > T. This means that metal P is the most reactive, while metal T is the least reactive. To determine which reaction can occur spontaneously, you need to remember that a more reactive metal can displace a less reactive metal from its salt solution.
Option A: \(T + P^+ \rightarrow T^+ + P\)
In this reaction, metal T is trying to displace metal P from its ion. However, since T is less reactive than P, this reaction cannot occur spontaneously.
Option B: \(Q + T^+ \rightarrow Q^+ + T\)
Here, metal Q is displacing metal T from its ion. Since Q is more reactive than T, this reaction can occur spontaneously. Therefore, this is the correct option.
Option C: \(R + Q^+ \rightarrow R^+ + Q\)
In this reaction, metal R is trying to displace metal Q from its ion. However, R is less reactive than Q, so this reaction cannot occur spontaneously.
Option D: \(T + R^+ \rightarrow T^+ + R\)
In this case, metal T is trying to displace metal R from its ion. Again, since T is less reactive than R, this reaction cannot occur spontaneously.
In summary, only Option B (\(Q + T^+ \rightarrow Q^+ + T\) can occur spontaneously, as metal Q is more reactive than metal T and can displace it from its ion.