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What does D.V.S stand for?

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What does D.V.S stand for?

(a) Denitration of Sulphuric acid

(b) Dehydrating value of sulphuric acid

(c) Decomposition of Sulphuric acid

(d) None of the mentioned

The question was asked in an online interview.

My question is from Mixed Acids for Nitration in section Nitration of Unit Processes

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Correct option is (b) Dehydrating value of sulphuric acid

The best I can explain: D.V.S. (dehydrating value of sulfuric acid) and is used for mixed-acid calculations.

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