Question

Pure nitric acid takes on yellowish brown colour when exposed to light. Give reasons​

Answer 1

Answer:

Nitric acid, upon exposure to light and heat, will spontaneously decompose to nitrogen dioxide, water, and oxygen, creating the brownish-yellow color. ... Nitric acid, upon exposure to light and heat, will spontaneously decompose to nitrogen dioxide, water, and oxygen, creating the brownish-yellow color.

Answer 2

Answer:

in the presence of sunlight nitric acid decomposes even at room temperature to give nitrogen dioxide,water and oxygen.

the NO2 so produced dissolves in conc HNO3. the yellow colour of conc nitric acid is due to NO2 dissolved in it

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