Metal 'A' displaces metal 'B' from its salt solution, but not able to displace metal 'C' from its salt solution. Metal 'B' displaces metal 'D' from its salt solution. Which of the following depicts correct order of reactivity of metals. ?

Option 3 : C > A > B > D 

Concept:

• Reactivity series is the arrangement of metals with oxygen in a vertical column in order of decreasing reactivities.
• The most reactive metal is placed on the top while the least reactive metal is placed at the bottom.
• If the metal atom can lose electrons easily to form positive ions and it will react rapidly with other substances. Hence, it will be reactive metal.
• If the metal atom loses electrons less readily to form positive ions and it will react slowly with other substances. Hence, it will be a less reactive metal.
• Metals that lose electrons more readily than hydrogen are also said to be more reactive.
• Metals that lose electrons less readily than hydrogen are also said to be less reactive.

Explanation:

• Metal A is able to displace the least reactive metal B from the salt solution because metal A is more reactive than metal B.
• But metal A is not able to displace metal C from the salt solution because metal C is more reactive than metal A.
• Metal B is able to displace the least reactive metal D from the salt solution because metal B is more reactive than metal D.
• So, from the above discussion we can say that metal C is more reactive followed by metal A, metal B, and metal D.

Thus, the correct answer is C > A > B > D.