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JEE Mains | PYQ

Consider the above reaction and identify the intermediate ‘\( X \)’.

Which of the following compounds is least likely to give effervescence of \( \mathrm{CO_2} \) in presence of aq. \( \mathrm{NaHCO_3} \)?

In the following sequence of reactions a compound A, (molecular formula \( \mathrm{C_6H_{12}O_2} \)) with a straight chain structure gives a \( \mathrm{C_4} \) carboxylic acid. A is:
\( \text{A} \xrightarrow[\mathrm{H_3O^+}]{\mathrm{LiAlH_4}} \text{B} \xrightarrow{\text{Oxidation}} \mathrm{C_4} \text{ - Carboxylic acid} \)

For the following sequence of reactions, the correct products are:

In the above conversion the correct sequence of reagents to be added is:

Compound \( (X) \) undergoes following sequence of reactions to given the Lactone \( (Y) \).

Compound \( (X) \) is:

The final product, ‘A’ in the following reaction sequence is:

Match List-I with List-II

Choose the correct answer from the options 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:

Maleic anhydride can be prepared by:

‘A’ in the given reaction is:

Consider the above reaction, the major product “P” formed is:

Decarboxylation of all six possible forms of diaminobenzoic acids \( \mathrm{C_6H_3(NH_2)_2COOH} \) yields three products A, B and C. Three acids gives a product ‘A’, two acids gives a product ‘B’ and one acid give a product ‘C’. The melting point of product ‘C’ is

The major product 'P' formed in the following sequence of reactions is:

Consider the above reaction, the compound ‘A’ is:

Two statements are given below:
Statement I: The melting point of monocarboxylic acid with even number of carbon atoms is higher than that of with odd number of carbon atoms acid immediately below and above it in the series.
Statement II: The solubility of monocarboxylic acids in water decreases with increase in molar mass.
Choose the most appropriate option:

Identify the product formed (A and E):

'A' shows positive Lassaigne's test for \( \mathrm{N} \) and its molar mass is \( 121 \).
'B' gives effervescence with aq. \( \mathrm{NaHCO_3} \).
'C' gives fruity smell.
Identify A, B and C from the following:

Given below are two statements, one is labelled as Assertion (A) and the other is labelled as Reason (R)
Assertion (A): A solution of the product obtained by heating a mole of glycine with a mole of chlorine in presence of red phosphorous generates chiral carbon atom
Reason (R): A molecule with \( 2 \) chiral carbons is always optically active
In the light of the above statements, choose the correct answer from the options given below:

Major product B of the following reaction has ______ \( \pi \)- bond.

Consider the following reactions. From these reactions which reaction will give carboxylic acid as a major product?
 

Choose the correct answer from the options given below:

The structure of product \( C \), formed by the following sequence of reactions is:
\( \mathrm{CH_3COOH} + \mathrm{SOCl_2} \longrightarrow A \xrightarrow[\mathrm{AlCl_3}]{\text{Benzene}} B \xrightarrow[\ -\mathrm{OH}\ ]{\mathrm{KCN}} C \)

The correct sequential addition of reagents in the preparation of \( 3 \)-nitrobenzoic acid from benzene is:

The correct sequence of reagents for the above conversion of X to Y is:

The major product ‘P’ formed in the given reaction is:

Match List I with List II:

The reaction used for preparation of soap from fat is:

Identify the pair of reactants that upon reaction, with elimination of \( \mathrm{HCl} \) will given rise to the dipeptide Gly-Ala.

Given below are two statements:
Statement I: Compound \( (X) \), shown below, dissolves in \( \mathrm{NaHCO_3} \) solution and has two chiral carbon atoms

Statement II: Compound \( (Y) \), shown below, has two carbons with \( sp^3 \) hybridization, one carbon with \( sp^2 \) and one carbon with \( sp \) hybridization
In the light of the above statements, choose the correct answer from the options given below:

Given below are two statements:
Statement I: The dipole moment of \( \mathrm{R{-}CN} \) is greater than \( \mathrm{R{-}NC} \) and \( \mathrm{R{-}NC} \) can undergo hydrolysis under acidic medium to produce .
Statement II: \( \mathrm{R{-}CN} \) hydrolyses under acidic medium to produce a compound which on treatment with \( \mathrm{SOCl_2} \), followed by the addition of \( \mathrm{NH_3} \) gives another compound (\( x \)). This compound (\( x \)) on treatment with \( \mathrm{NaOCl/NaOH} \) gives a product, that on treatment with \( \mathrm{CHCl_3/KOH/\Delta} \) produces \( \mathrm{R{-}NC} \).
In the light of the above statements, choose the correct answer from the options given below:

Find out the major product for the above reaction.

The least acidic compound, among the following is:

Major product ‘\( P \)’ formed in the following reaction is: