What are the conclusions when litmus test and thermal decomposition test is done on nitric acid?

Presence of nitric acid from litmus test and evolution of oxygen from thermal decomposition

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Confirmation of acidic nature from litmus test and evolution of nitrogen dioxide from thermal decomposition

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Evolution of nitrogen dioxide from litmus test and evolution of oxygen in thermal decomposition

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Confirmation of acidic nature from litmus test and evolution of nitrogen oxide from thermal decomposition

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Solution

The correct option is B Confirmation of acidic nature from litmus test and evolution of nitrogen dioxide from thermal decomposition
Litmus test on nitric acid turns blue litmus red which is a confirmation that the given sample is an acid. Thermal decomposition of nitric acid result in the formation of nitrogen dioxide which is brownish yellow in colour thus helps to confirm the presence of nitrogen in the compound.

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