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In zeolite process, the exchange of ___________ takes place.

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In zeolite process, the exchange of ___________ takes place.

(a) Anions

(b) Cations

(c) Both cations and anions

(d) No ions exchange

The question was posed to me at a job interview.

This key question is from Zeolites topic in section Water and its Treatment of Engineering Chemistry II

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Right option is (b) Cations

For explanation: In the zeolite process, the exchange of only cations takes place. The specific activation modality of most zeolitic catalysts used in petrochemical applications involves quantum-chemical Lewis acid site reactions.

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