Certain chemical reactions prodceed by absorption of sound energy for example: acetylene breaks up into carbon and hydrogenby absorbing sound energy. So here sound energy acts as a positive or a negative catalyst ??

Dear student,

The positive catalyst are those which decrease the activation energy and increase the rate of reaction and vice-versa for the negative catalyst .  now in the given statement reaction taken place in presence of sound energy so this energy acts as a positive catalyst.
Regards

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