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The glass surface is subject to corrosion due to the presence of ______

(a) magnesium

(b) potassium

(c) sodium

(d) calcium

The question was posed to me at a job interview.

This question is from Glass as Packaging Material in division Glass Packaging Materials of Food Packaging Technology

1 Answer

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Best answer
Right option is (c) sodium

For explanation: The glass surface is subject to corrosion due to the presence of sodium. The glass surface is subject to three forms of “corrosion”: etching, leaching and weathering, as a consequence of the sodium in glass being loosely combined in the silica matrix.

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