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Why does HNO3 BECOMES YELLOW ON …

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Why does HNO3 BECOMES YELLOW ON LONG STANDING?

    • Posted by Vaanshi Goel 7 years, 11 months ago

    CBSE > Class 12 > Chemistry
    • 1 answers

    Vineet Kumar Gupta 7 years, 11 months ago

    Nitric acid takes yellowish brown colour due to the presence of dissolved nitrogen dioxide. Nitric acid slowly decomposes even at room temperature, specially in the presence of sunlight. Liberated nitrogen dioxide dissolves in the acid and gives a yellow colour. Brown vapours are seen in the bottle and the nitric acid turns yellowish in colour

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