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Ethene can be reacted with hydrogen gas to form ethane. The reaction can be facilitated by the use of a metal heterogeneous catalyst.

Which of the following statements is NOT true when hydrogen gas reacts with ethene ($C_2H_4$) by use of a metal catalyst to form ethane ($C_2H_6$)?


The hydrogen gas particles are absorbed by the metal surface and split into individual atoms.


The individual hydrogen atoms can easily migrate across the surface of the metal surface to bond with the ethene molecules.


The ethene molecules are attracted to the metal surface only after sufficient numbers of individual hydrogen atoms have been formed by the metal catalyst.


Once the ethane molecules are formed, the adhesion of the new molecule to the metal surface is decreased, releasing the ethane particles.

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