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Question

Of the options given,a physical property that does not belong to nitric acid is ___

A
It is a colourless liquid
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B
HNO3 exists as a ​planar molecule​ in gaseous state.
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C
It has a boiling point of 231.4 K
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D
On exposure to light, it turns slightly brown
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Solution

The correct option is C It has a boiling point of 231.4 K
The physical properties of nitric acid are :-
1. The impure acid is yellow in colour.
2. It has boiling point 355.6 K and Freezing point is 231.4 K.
3. It has a corrosive action on skin and procuces painful blisters
4. It is a colourless liquid.
5. HNO3 exists as a ​planar molecule​ in gaseous state.
6. On exposure to light, it turns slightly brown because of slight decomposition into NO2 and O2.​
4HNO34NO2+O2+2H2O

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