Question

Single displacement reactions why the position of hydrogen cannot be fixed exactly with other elements like Li Na K Rb Cs

Answer 1

1. The position of hydrogen cannot be fixed exactly with respect to the other elements listed in the activity series because it is only known that hydrogen is more reactive than copper and less reactive than zinc, but it is not known if it is more or less reactive than lead, which lies between copper and zinc.

2. In order to establish the exact position of hydrogen in the activity series lead will have to be introduced to sulfuric acid to see if lead is more or less reactive than hydrogen.

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