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Concentrated HNO3, upon long standing, t...

Concentrated `HNO_3`, upon long standing, turns yellow-brown due to the formation of

A

`NO`

B

`NO_2`

C

`N_2 O`

D

`N_2 O_4`

Text Solution

Verified by Experts

The correct Answer is:
B
`4 HNO_3 rarr 2 H_2 O + 4 NO_2 + O_2`
`NO_2` remains dissolved in `HNO_3` colouring it yellow or even red at higher temperature.
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