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

Explain why low molecular mass alcohols are soluble in water.

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प्रश्न

Explain why low molecular mass alcohols are soluble in water.

टीपा लिहा
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उत्तर

The low molecular mass alcohols are soluble in water due to the presence of intermolecular hydrogen bonding between their molecules. Polar O – H group favours dissolution process whereas non-polar alkyl group does not. As the size of the alkyl group increases, it overcomes the effect of the polar nature OH group and the solubility decreases.

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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 52 | पृष्ठ १६०

संबंधित प्रश्‍न

Write the reactions of Williamson synthesis of 2-ethoxy-3-methylpentane starting from ethanol and 3-methylpentan-2-ol.


Which of the following is an appropriate set of reactants for the preparation of 1-methoxy-4-nitrobenzene and why?

(i) (ii)

Write the name of the reagent and the equation for the preparation of the following ether by Williamson’s synthesis:

Ethoxybenzene


Preparation of ethers by acid dehydration of secondary or tertiary alcohols is not a suitable method. Give reason.


Account for the following : 
t-butyl chloride on heating with sodium methoxide gives 2-methylpropene instead of t-butyl methyl ether.


Dehydration of alcohol to ethers is catalysed by:


Preparation of alcohols from alkenes involves the electrophilic attack on alkene carbon atom. Explain its mechanism.


The major product [B] in the following reactions is:

\[\begin{array}{cc}\ce{CH3}\phantom{..................................}\\|\phantom{.....................................}\\\ce{CH3 - CH2 - CH - CH2 - OCH2 - CH3 ->[HI][Heat] [A] alcohol ->[H2SO4][\Delta] [B]}\end{array}\]


HBr reacts with \[\ce{CH2 = CH - OCH3}\] under anhydrous conditions at room temperature to give ______.


Which of the following reactions are feasible?


What is metamerism? Give the structure and IUPAC name of metamers of 2-methoxy propane.


Write the name of reagent and equation for the preparation of the following ethers by Williamson’s synthesis:

2-Methoxy-2-methylpropane


What will be the product (X and A)for the following reaction

  \[\ce{acetylchloride->[i)CH3MgBr][ii)H3O+]X ->[acidk2crp3]A}\] 


Short Answer Question.

Identify the product (s) is / are formed when 1 – methoxy propane is heated with excess HI. Name the mechanism involved in the reaction


Write the names of reagents and equations for the preparation of the following ether by Williamson’s synthesis:

2-Methoxy-2-methylpropane


Short Answer Question.

Identify the product (s) is/are formed when 1 – methoxy propane is heated with excess HI. Name the mechanism involved in the reaction.


Give the structure and IUPAC name of metamers of 2-methoxy propane


Write the name of reagent and equation for the preparation of the following ether by Williamson’s synthesis:

2-Methoxy-2-methylpropane


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