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

Assertion: p-nitrophenol is more acidic than phenol. Reason: Nitro group helps in the stabilisation of the phenoxide ion by dispersal of negative charge due to resonance.

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प्रश्न

Assertion: p-nitrophenol is more acidic than phenol.

Reason: Nitro group helps in the stabilisation of the phenoxide ion by dispersal of negative charge due to resonance.

पर्याय

  • Assertion and reason both are correct and reason is correct explanation of assertion.

  • Assertion and reason both are wrong statements.

  • Assertion is correct statement but reason is wrong statement.

  • Assertion is wrong statement but reason is correct statement.

  • Both assertion and reason are correct statements but reason is not correct explanation of assertion.

MCQ
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उत्तर

Assertion and reason both are correct and reason is correct explanation of assertion.

Explanation:

P-nitro phenol is more acidic as nitro group helps in the stabilization of the phenoxide ion by dispersal of negative charge due to resonance.

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पाठ 11: Alcohols, Phenols and Ethers - Multiple Choice Questions (Type - I) [पृष्ठ १६३]

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एनसीईआरटी एक्झांप्लर Chemistry Exemplar [English] Class 12
पाठ 11 Alcohols, Phenols and Ethers
Multiple Choice Questions (Type - I) | Q 62 | पृष्ठ १६३

संबंधित प्रश्‍न

What is metamerism? 


Name the following compound according to the IUPAC system.

\[\begin{array}{cc}
\phantom{..................}\ce{CH2OH}\\
\phantom{.........}|\\
\ce{CH3 - CH2 - CH - CH - CH - CH3}\\
\phantom{.........}|\phantom{...................}|\\
\phantom{.............}\ce{CH2Cl}\phantom{..........}\ce{CH3}\phantom{}
\end{array}\]


Write the IUPAC name of the following compound:


Write structures of the compounds whose IUPAC names are as follows:

3-Chloromethylpentan-1-ol.


Give the IUPAC name of the following ether:

\[\begin{array}{cc}
\ce{C2H5OCH2 - CH - CH3}\\
\phantom{.........}|\\
\phantom{.............}\ce{CH3}
\end{array}\]


How is phenol converted into the following?

Benzene


How is phenol converted into the following?

benzoquinone


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


How do you convert the Ethanal to Propanone


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


Write structural formulae for 1-Ethylcyclohexanol.


C6H5OCH2CH3 is called:


Cresol has ____________.


Which of the following compounds is oxidised to prepare methyl ethyl ketone?


HBr reacts fastest with ____________.


\[\ce{Phenol ->[Zn, dust] 'X' ->[CH3Cl][Anhy. AlCl3] 'Y' ->[Alkaline][KMnO4] 'Z'}\]

The product ‘Z’ is:


Give IUPAC name of the compound given below.

\[\begin{array}{cc}
\phantom{}\ce{CH3 - CH - CH2 - CH2 - CH - CH3}\phantom{.}\\
\phantom{.........}|\phantom{...................}|\phantom{...........}\\
\phantom{..}\ce{Cl}\phantom{.................}\ce{OH}\phantom{..}
\end{array}\]


Assertion: Addition reaction of water to but-1-ene in acidic medium yields butan-1-ol.

Reason: Addition of water in acidic medium proceeds through the formation of primary carbocation.


Draw structure of the following compound.

2. 5-Diethylphenol


Write the IUPAC name of the following compound:

\[\begin{array}{cc}
\phantom{...............}\ce{CH3}\\
\phantom{.............}|\\
\ce{CH3 - CH - CH - C - CH3}\\
|\phantom{......}|\phantom{......}|\\
\phantom{...}\ce{CH3}\phantom{..}\ce{OH}\phantom{...}\ce{CH3}
\end{array}\]


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