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Aluminium in Nathan’s vessels was replaced by ________

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Aluminium in Nathan’s vessels was replaced by ________

(a) Iron

(b) Glass

(c) Stainless steel

(d) Ceramics

The question was asked during an internship interview.

This key question is from Large Capacity Fermenters in chapter Fermentation System & Management of Fermentation Technology

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The correct option is (c) Stainless steel

To explain: Aluminium in Nathan’s vessel was replaced by stainless steel. Stainless steel consists of a film which is composed of nickel, chromium, etc. which increases the resistance of the vessel to corrosion.

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