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JEE Mains | PYQ

The major product in the following reaction is:

Compound \( I \) is heated with Conc. \( \mathrm{HI} \) to give a hydroxy compound \( A \) which is further heated with \( \mathrm{Zn} \) dust to give compound \( B \). Identify \( A \) and \( B \).

The major product in the reaction is:

The major product \( (P) \) of the given reaction is
(where, Me is \( -\mathrm{CH_3} \) )

Terylene polymer is obtained by condensation of:

When ethanol is heated with conc. \( \mathrm{H_2SO_4} \) , A gas is produced. The compound formed, when this gas is treated with cold dilute aqueous solution of Baeyer’s reagent, is:

Identify the major products \( A \) and \( B \) for the below given reaction sequence.

Given below are two statements:
Statement I: The esterification of carboxylic acid with an alcohol is a nucleophilic acyl substitution.
Statement II: Electron withdrawing groups in the carboxylic acid will increase the rate of esterification reaction.
Choose the most appropriate option:

In the given reaction,

The number of \( \text{sp}^2 \) hybridized carbon(s) in compound ‘X’ is _______.

Most stable product of the following reaction is:

The number of chiral alcohol(s) with molecular formula \( \text{C}_4\text{H}_{10}\text{O} \) is _______.

Match List-I with List-II.

Choose the correct answer from the options given below:

A sample of \( 4.5 \, \text{mg} \) of an unknown monohydric alcohol, \( \mathrm{R{-}OH} \) was added to methylmagnesium iodide. A gas is evolved and is collected and its volume measured to be \( 3.1 \, \text{mL} \). The molecular weight of the unknown alcohol is ________ \( \text{g/mol} \). [Nearest integer]

The intermediate \( X \), in the reaction:

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 correction option :

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

The major product in the given reaction is:

The number of non-ionizable protons present in the product \( B \) obtained from the following reactions is ______.
\( \mathrm{C_2H_5OH} + \mathrm{PCl_3} \rightarrow \mathrm{C_2H_5Cl} + A \) 
\( A + \mathrm{PCl_3} \rightarrow B \)

Hydrolysis of which compound will give carbolic acid?

\( \mathrm{C_6H_{12}O_6} \xrightarrow{\text{Zymase}} A \xrightarrow[\Delta]{\mathrm{NaOI}} B + \mathrm{CHI_3} \)
The number of carbon atoms present in the product \( B \) is __________.

In the following reaction:

The compounds \( A \) and \( B \) respectively are:

A compound ‘X’ is acidic and it is soluble in \( \mathrm{NaOH} \) solution, but insoluble in \( \mathrm{NaHCO_3} \) solution. Compound ‘X’ also gives violet colour with neutral \( \mathrm{FeCl_3} \) solution. The compound ‘X’ is:

What is the major product of the following reaction?

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:

In the given conversion the compound \( \mathrm{A} \) is:

Which of the following reagents / reactions will convert 'A' to 'B'?

Hex-4-ene-2-ol on treatment with PCC gives 'A'. 'A' on reaction with sodium hypoiodite gives 'B', which on further heating with soda lime gives 'C'. The compound 'C' is: