Advertisements
Advertisements
प्रश्न
Explain why is OH group in phenols more strongly held as compared to OH group in alcohols.
Advertisements
उत्तर
In phenol, oxygen atom is attached to sp2-hybridised carbon atom while in alcohol, it is attached to sp3-hybridised carbon atom. The bond formed between oxygen and sp2-hybridised carbon is more strongly held then that formed between oxygen and sp3-hybridised carbon.
APPEARS IN
संबंधित प्रश्न
Give reasons for the following:
o-nitrophenol is more acidic than o-methoxyphenol.
Write the mechanism of the following reaction :
Show how will you synthesize pentan-1-ol using a suitable alkyl halide.
Name the reagent used in the following reaction:
Oxidation of a primary alcohol to carboxylic acid.
The compound which reacts fastest with Lucas reagent at room temperature is:
In the reduction \[\ce{R - CHO + H2 -> RCH2OH}\] the catalyst used is:
By which of the following methods alcohol can be prepared in excellent yield?
Which of the following is not true in case of reaction with heated copper at 300°C?
Lucas test is done to differentiate between ____________.
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 ____________.
Mark the correct increasing order of reactivity of the following compounds with HBr/HCl.
| (a) |  |
| (b) |  |
| (c) |  |
Name the factors responsible for the solubility of alcohols in water.
Alcohols react with active metals e.g. Na, K etc. to give corresponding alkoxides. Write down the decreasing order of reactivity of sodium metal towards primary, secondary and tertiary alcohols.
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.
Assertion: Bond angle in ethers is slightly less than the tetrahedral angle.
Reason: There is a repulsion between the two bulky (–R) groups.
Write the mechanism of acid dehydration of ethanol to yield ethene.
Write the mechanism of acid dehydration of ethanol to yield ethene.
Write the mechanism of acid dehydration of ethanol to yield ethene.
Write the mechanism of acid-catalysed dehydration of ethanol to yield ethene.
