The concentration of each of `Y^(-)` and `Z^(-)` in a solution is 1 M. At `25^(@)C`, a gas X at a pressure of 1 atm is allowed to pass through the solution. If the values of standard reduction potentials of X, Y and Z follows the order `Z gt X gt Y`, then which one between `Y^(-)` and `Z^(-)` would be oxidised by X?

Explanation

The element having higher standard reduction potential acts as stronger oxidising agent whereas elements having lower reduction potential acts as stronger reducing agent. As `E_(X)^(@) gt E_(Y)^(@)`, hence X will have higher tendency to get reduced than Y while `E_(Z)^(@) gt E_(X)^(@)` as Z is stronger oxidant than X. Therefore X can oxidise only `Y^(-)` but not `Z^(-)`.