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कर्नाटक बोर्ड पी.यू.सी.पीयूसी विज्ञान 2nd PUC Class 12

Explain why p-nitrophenol is more acidic than phenol.

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प्रश्न

Explain why p-nitrophenol is more acidic than phenol.

टीपा लिहा
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उत्तर

The electron-withdrawing group (−NO2), withdraws electrons and disperses the negative charge. Therefore, the −NO2 group stabilizes the phenoxide ion. Hence p-nitrophenol is more acidic than phenol.

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पाठ 11: Alcohols, Phenols and Ethers - Multiple Choice Questions (Type - I) [पृष्ठ १६०]

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एनसीईआरटी एक्झांप्लर Chemistry Exemplar [English] Class 12
पाठ 11 Alcohols, Phenols and Ethers
Multiple Choice Questions (Type - I) | Q 53 | पृष्ठ १६०

संबंधित प्रश्‍न

Write the IUPAC name of the following compound:

C6H5 – O – C2H5


Ethylidene dichloride when boiled with aqueous solution of NaOH yields _______.

(A) formaldehyde

(B) acetaldehyde

(C) acetone

(D) ethyl methyl ketone


Write IUPAC name of the following compound (CH3)2 N − CH2CH3


Write the structures of the products when Butan-2-ol reacts with CrO3


In the dehydration of alcohols to alkenes by heating with concentrated sulphuric acid, the initiation step is:

(1) formation of carbonation

(2) formation of an ester

(3) protonation of the alcohol molecule

(4) elimination of water


C6H5OCH2CH3 is called:


HBr reacts fastest with ____________.


n-Propyl alcohol and isopropyl alcohol can be chemically distinguished by which reagent?


The major product formed by the reaction:

\[\begin{array}{cc}
\ce{CH3CH-CH2Br ->[CH3O^-][CH3OH] is}\\
|\phantom{................}\\
\ce{CH3}\phantom{.............}
\end{array}\]


\[\ce{HC ≡ CH ->[HgSO4][H2SO4] ->[CH3MgBr][H2O] ->[PBr3]}\]


Among the following sets of reactants which one produces anisole?


The correct acidic strength order of the following is:


     (I)


    (II)


     (III)


IUPAC name of the compound \[\begin{array}{cc}
\ce{CH3 - CH - OCH3}\\
\phantom{}|\phantom{....}\\
\phantom{}\ce{CH3}\phantom{..}
\end{array}\] is ______.


Which of the following reagents can be used to oxidise primary alcohols to aldehydes?

(i) \[\ce{CrO3}\] in anhydrous medium.

(ii) \[\ce{KMnO4}\] in acidic medium.

(iii) Pyridinium chlorochromate.

(iv) Heat in the presence of Cu at 573 K.


Assertion: IUPAC name of the compound

\[\begin{array}{cc}
\ce{CH3 - CH - O - CH2 - CH2 - CH3}\\  
|\phantom{....................}\\
\ce{CH3}\phantom{.................}
\end{array}\] is 2-Ethoxy-2-methylethane.

Reason: In IUPAC nomenclature, ether is regarded as hydrocarbon derivative in which a hydrogen atom is replaced by —OR or —OAr group [where R = alkyl group and Ar = aryl group]


Write complete reaction for the bromination of phenol in aqueous and non-aqueous medium.


Give the structures of Thiosulphuric acid and Peroxy monosulphuric acid.


Write structural formulae for:

Salicylic acid


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