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Which of the following reactions best represents lab scale preparation of nitric acid?

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in Chemistry – Class 12 by (188k points)
Which of the following reactions best represents lab scale preparation of nitric acid?

(a) 3HNO2 → HNO3 + H2O + 2NO

(b) NO2 + O2 → NO3

(c) NaNO3 + H2SO4 → NaHSO4 + HNO3

(d) 3NO2 + H2O → 2HNO3 + NO

I have been asked this question by my school teacher while I was bunking the class.

I would like to ask this question from P-Block Elements topic in portion P-Block Elements of Chemistry – Class 12

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Right choice is (c) NaNO3 + H2SO4 → NaHSO4 + HNO3

For explanation I would say: The most appropriate lab scale preparation method of nitric acid, HNO3 is using an alkali nitrate salt and react it with concentration nitric acid in a glass retort.  Nitrous acid being highly unstable decomposes into nitric acid. The other two sets of reaction represent the industrial process of manufacturing nitric acid i.e. Ostwald’s process.

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