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

Assertion: Bond angle in ethers is slightly less than the tetrahedral angle. Reason: There is a repulsion between the two bulky (–R) groups. - Chemistry

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प्रश्न

Assertion: Bond angle in ethers is slightly less than the tetrahedral angle.

Reason: There is a repulsion between the two bulky (–R) groups.

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 is wrong statement but reason is correct statement.

Explanation:

Bond angle in ethers is slightly more than the tetrahedral angle due to repulsion between two bulky alkyl group.

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

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एनसीईआरटी एक्झांप्लर Chemistry [English] Class 12
पाठ 11 Alcohols, Phenols and Ethers
Multiple Choice Questions (Type - I) | Q 64 | पृष्ठ १६३

संबंधित प्रश्‍न

Write the final product(s) in each of the following reactions:


Write the mechanism of the following reaction :


Show how will you synthesize pentan-1-ol using a suitable alkyl halide.


Give the equation of the following reaction: 

Dilute HNO3 with phenol.


When 3-methylbutan-2-ol is treated with HBr, the following reaction takes place:

\[\begin{array}{cc}
\phantom{.......................}\ce{Br}\\
\phantom{......................}|\\
\ce{CH3 - CH - CH - CH3 ->[HBr] CH3 - C - CH2 - CH3}\\
\phantom{.}|\phantom{......}|\phantom{......................}|\phantom{........}\\
\phantom{}\ce{CH3}\phantom{...}\ce{OH}\phantom{...................}\ce{CH3}\phantom{.....}
\end{array}\]

Give a mechanism for this reaction.

(Hint: The secondary carbocation formed in step II rearranges to a more

stable tertiary carbocation by a hydride ion shift from 3rd carbon atom.)


The compound which reacts fastest with Lucas reagent at room temperature is:


Dehydration of 2-butanol yields:


Which one of the following on oxidation gives a ketone?


Primary and secondary alcohols on the action of reduced copper give:


The compound which gives the most stable carbonium ion on dehydration is:


During dehydration of alcohols to alkenes by heating with cone. H2SO4 the initial step is ____________.


Identify the secondary alcohols from the following set:

  1. \[\ce{CH3CH2CH(OH)CH3}\]
  2. \[\ce{(C2H5)3COH}\]



Mark the correct increasing order of reactivity of the following compounds with HBr/HCl.

(a)
(b)
(c)

Suggest a reagent for the following conversion.


Explain why nucleophilic substitution reactions are not very common in phenols.


Ethers can be prepared by Williamson synthesis in which an alkyl halide is reacted with sodium alkoxide. Di-tert-butyl ether can’t be prepared by this method. Explain.


Write the mechanism of acid dehydration of ethanol to yield ethene.


Write the mechanism of acid-catalysed dehydration of ethanol to yield ethene.


Write the mechanism of acid dehydration of ethanol to yield ethene. 


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