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Questions  

Out of the two compounds given below, the vapour pressure of (B) at a particular temperature is..........
 

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a
Higher than that of (A)
b
Lower than that of (A)
c
Higher or lower than (A), depending upon the size of the vessel
d
Same as that of (A)

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detailed solution

Correct option is A

Due to intramoleular hydrogen bonding , ortho-Nitrophenol has less boiling point and more volatile. Hence it has higer vapour pressure. 

Why mass of para nitrophenol ortho nitrophenol It must be opposite because  of intramolecular hydrogen bond present in ortho - Chemistry - Chemical  Bonding and Molecular Structure - 9497689 | Meritnation.com
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