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 + NOI 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

Which of the following reactions best represents lab scale preparation

1.	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 + NOI 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
Answer» 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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