Alcohols Phenols and Ethers — JEE Main PYQs

For the given reaction

(see structure)

The total number of possible products formed by tertiary carbocation of A is ______.

Given below are two statements, one is labelled as Assertion A and the other is labelled as Reason R.
Assertion A: Order of acidic nature of the following compounds is A>B>C.

Reason R: Fluoro is a stronger electron withdrawing group than Chloro group.
In the light of the above s …

Decreasing order of dehydration of the following alcohols is
a (see structure)
b (see structure)
c (see structure)
d (see structure)

'A' and 'B' formed in the following set of reactions are :

In the cumene to phenol preparation in presence of air, the intermediate is

The increasing order of ${\mathrm{pK}}_{\mathrm{a}}$ for the following phenols is
(1) 2, 4-Dinitrophenol
(2) 4 - Nitrophenol
(3) 2,4,5-Trimethylphenol
(4) Phenol
(5) 3-Chlorophenol

Find out the major product for the following reaction.

A trisubstituted compound 'A', ${\mathrm{C}}_{10}{\mathrm{H}}_{12}{\mathrm{O}}_2$ gives neutral ${\mathrm{FeCl}}_3$ test positive. Treatment of compound 'A' with NaOH and ${\mathrm{CH}}_3\mathrm{Br}$ gives ${\mathrm{C}}_{11}{\mathrm{H}}_{14}{\mathrm{O}}_2$, with hydroiodic a …

' X ' is : $\underset{\Delta }{\mathrm{O}}+\underset{\text{ Major product }}{\mathrm{HF}}$

The correct order of ${\mathrm{pK}}_{\mathrm{a}}$ values for the following compounds is:
(a) (see structure)
(b) (see structure)
(c) (see structure)
(d) (see structure)

Number of compounds from the following which will not dissolve in cold ${\mathrm{NaHCO}}_3$ and NaOH solutions but will dissolve in hot NaOH solution is ______.

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 1.84 mg sample of polyhydric alcoholic compound ' X ' of molar mass $92.0\mathrm{g}/\mathrm{mol}$ gave 1.344 mL of ${\mathrm{H}}_2$ gas at STP. The number of alcoholic hydrogens present in compound ' X ' is ____.

The major product in the given reaction is

Compound I is heated with Conc. HI to give a hydroxy compound A which is further heated with Zn dust to give compound B. Identify A and B.

In the above reaction product B is:

In the following reaction

The % yield for reaction I is 60% and that of reaction II is $50\%$. The overall yield of the complete reaction is __ % [nearest integer]

Given below are two statements:

Statement I: On heating with KHSO₄, 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.

Hydrolysis of which compound will give carbolic acid?

Arrange the following in decreasing acidic strength.
(A) (see structure)
(B) (see structure)
(C) (see structure)
(D) (see structure)

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

The major product (P) of the given reaction is (where, Me is $-{\mathrm{CH}}_3$)

In the given reaction

the number of ${\mathrm{sp}}^2$ hybridised carbon (s) in compound ' X ' is ____.

The major product in the following reaction

Given below are two statements.
Statement I: Phenols are weakly acidic.
Statement II: Therefore they are freely soluble in NaOH solution and are weaker acids than alcohols and water.
Choose the most appropriate option:

Consider the above reaction sequence and identify the product $\mathbf{B}$.

Compound 'P' on nitration with dil. ${\mathrm{HNO}}_3$ yields two isomers (A) and (B). These isomers can be separated by steam distillation. Isomers (A) and (B) show the intramolecular and intermolecular hydrogen bonding respectively. Compound (P) on reaction with conc. …

A compound 'X' is acidic and it is soluble in NaOH solution, but insoluble in $\mathrm{NaHCO}{}_3$ solution. Compound 'X' also gives violet colour with neutral $\mathrm{FeCl}{}_3$ solution. The compound 'X' is:

Amongst the following, the major product of the given chemical reaction is

Phenol on reaction with dilute nitric acid, gives two products. Which method will be most effective for large scale separation ?

The intermediate X, in the reaction

In the following reaction :

The compounds A and B respectively are :-

Identify products A and B .

Which is the final product (major) 'A' in the given reaction?

Which of the following compound gives pink colour on reaction with phthalic anhydride in conc. ${\mathrm{H}}_2{\mathrm{SO}}_4$ followed by treatment with NaOH ?

Which one for the following phenols does not give colour when condensed with phthalic anhydride in presence of conc. ${\mathrm{H}}_2{\mathrm{SO}}_4$ ?

Which one of the following compounds will provide a tertiary alcohol on reaction with excess of ${\mathrm{CH}}_3\mathrm{MgBr}$ followed by hydrolysis?

An organic compound $\mathrm{A}({\mathrm{C}}_6{\mathrm{H}}_6\mathrm{O})$ gives dark green colouration with ferric chloride. On treatment with ${\mathrm{CHCl}}_3$ and KOH, followed by acidification gives compound B. Compound B can also be obtained from compound C on reaction with …

Given below are two statements :
Statements I: o- Nitrophenol is steam volatile due to intramolecular hydrogen bonding.
Statement II: o- Nitrophenol has high meliting due to hydrogen bonding.
In the light of the above statements, choose the most appropriate answer from the option …

Identify the major products $A$ and $B$ respectively in the following reactions of phenol :

In the following sequence of reactions, the final product D is :

Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R).
Assertion (A): Synthesis of ethyl phenyl ether may be achieved by Williamson synthesis.
Reason (R): Reaction of bromobenzene with sodium ethoxide yields ethyl phenyl ether. …

Consider the above reaction and identify the product P:

Consider the above reaction, the major product "P" formed is

Consider the above reaction, and choose the correct statement:

In the following sequence of reactions a compound $\mathbf{A}$, (molecular formula ${\mathrm{C}}_6{\mathrm{H}}_{12}{\mathrm{O}}_2$ ) with a straight chain structure gives a C4 carboxylic acid. A is …

Experimentally reducing a functional group cannot be done by which one of the following reagents?

The products "A" and "B" formed in above reactions are:

Main products formed during a reaction of 1-methoxy naphthalene with hydroiodic acid are:

1-methyl ethylene oxide when treated with an excess of HBr, produces