On the basis of sequence of reactions given below, identify the most reactive and least reactive element.

B + AX → BX + A

A + CY → AY + C

C, B

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A, B

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B, C

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B, A

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Solution

The correct option is C
B, C

B, C

B displaces A from its solution and A displaces C from its solution so, B is most reactive and C is least reactive.

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