Alcohols Phenols and Ethers

The difference in the reaction of phenol with bromine in chloroform and bromine in water medium is due to :

Hydrolysis of which compound will give carbolic acid?

The increasing order of $\mathrm{pK_a}$ for the following phenols is (A) 2, 4 - Dinitrophenol (B) 4 - Nitrophenol (C) 2, 4, 5 - Trimethylphenol (D) Phenol (E) 3-Chlorophenol Choose the correct answer from the option given below :

Given below are two statements : one is labelled as Assertion A and the other is labelled as Reason R : Assertion A : Acetal / Ketal is stable in basic medium. Reason R : The high leaving tendency of alkoxide ion gives the stability to acetal/ketal in basic medium. In the light of the above statements, choose the correct answer from the options given below :

During dehydration of alcohols to alkenes by heating with conc. H₂SO₄ the initiation step is

Acid catalyzed hydration of alkenes except ethene leads to the formation of

The best reagent to convert pent -3- en-2-ol into pent -3-en-2-one is

From amongst the following alcohols the one that would react fastest with conc. HCl and anhydrous ZnCl₂, is

An unknown alcohol is treated with the “Lucas reagent” to determine whether the alcohol is primary, secondary or tertiary. Which alcohol reacts fastest and by what mechanism:

The most suitable reagent for the conversion of R - CH₂ - OH $\to$ R - CHO is:

Bouveault-Blanc reduction reaction involves :

The major product of the following reaction is : ${\rm{C}}{{\rm{H}}_3}{\rm{CH = CHC}}{{\rm{O}}_2}{\rm{CH_3 }}\buildrel {LiAl{H_4}} \over \longrightarrow$

Ceric ammonium nitrate and CHCl₃/alc. KOH are used for the identification of functional groups present in __________ and _______ respectively.

Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A) : Treatment of bromine water with propene yields 1-bromopropan-2-ol. Reason (R) : Attack of water on bromonium ion follows Markovnikov rule and results in 1-bromopropan-2-ol. In the light of the above statements, choose the most appropriate answer from the options given below :

Given below are two statements : Statement I : On heating with $\mathrm{KHSO}_{4}$, glycerol is dehydrated and acrolein is formed. Statement II : Acrolein has fruity odour and can be used to test glycerol's presence. Choose the correct option.

When ethanol is heated with conc. $\mathrm{H}_{2} \mathrm{SO}_{4}$, a gas is produced. The compound formed, when this gas is treated with cold dilute aqueous solution of Baeyer's reagent, is

A solution of $\mathrm{Cr O_5}$ in amyl alcohol has a __________ colour.

Incorrect method of preparation for alcohols from the following is:

Given below are two statements, one is labelled as Assertion A and the other is labelled as Reason R Assertion A : Butylated hydroxy anisole when added to butter increases its shelf life. Reason R : Butylated hydroxy anisole is more reactive towards oxygen than food. In the light of the above statements, choose the most appropriate answer from the options given below