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Which of the following acts as a resistant against HCl?

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Which of the following acts as a resistant against HCl?

(a) Nickel

(b) Aluminium bronze

(c) Manganese bronze

(d) All of the mentioned

This question was posed to me during an interview.

This intriguing question comes from Equipments for Hydrolysis topic in portion Hydrolysis of Unit Processes

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The correct answer is (d) All of the mentioned

The best I can explain: Nickel and Monel metal are fairly resistant to low hydrochloric acid concentrations. With dilute acid, several of the copper-base alloys, such as phosphor bronze, aluminium bronze, manganese bronze, and Everdur metal, have fairly good resistance and can often be used in applications where corrosion can be offset by a heavy wall thickness.

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