datavorous/entrance-exam-dataset huggingface dataset:
The major product in the reaction

Options:
A t-Butyl ethyl ether
B 2 -Methyl pent-1-ene
C 2,2 -Dimethyl butane
D 2 -Methyl prop-1-ene

The correct answer is:
2 -Methyl prop-1-ene

Solution:
CH33C-O-K+ is a very strong base and a weak nucleophile due to its bulkiness. So it will give E2 elimination reaction as follows.

Topic: Chemistry, Haloalkanes and Haloarenes, JEE Main, JEE Main 2022 (25 Jun Shift 1)
The major product is -

Options:
A
B
C
D

The correct answer is:

Solution:
From the diagram, we can see that the central double bond does not get involved in aromaticity. So, gets reduced easily.

Topic: Chemistry, Hydrocarbons, JEE Main
The major product obtained from E2-elimination of 3-bromo-2-fluoropentane is

Options:
A
B
C
D

The correct answer is:

Solution:
Electronegativity of F is higher than Br so hydrogen near to fluorine is more acidic hence it will leave in presence of base.

Topic: Chemistry, Haloalkanes and Haloarenes, JEE Main, JEE Main 2020 (02 Sep Shift 2)
The major product obtained from the following reaction is :

Options:
A
B
C
D

The correct answer is:

Solution:

Topic: Chemistry, Hydrocarbons, JEE Main, JEE Main 2020 (06 Sep Shift 1)
The major product obtained in the following conversion is:

Options:
A

B

C

D

The correct answer is:

Solution:

Topic: Chemistry, Haloalkanes and Haloarenes, JEE Main, JEE Main 2019 (11 Jan Shift 2)
The major product obtained in the following reaction is

Options:
A
B
C
D

The correct answer is:

Solution:
Here Intramolecular Aldol condensation takes place as Keto is more acidic than ester so, αH w.r.t. keto is used for generation of carbanion for further reaction as follows

Topic: Chemistry, Aldehydes and Ketones, JEE Main
The major product obtained in the following reaction is:

Options:
A
B
C
D

The correct answer is:

Solution:
Given reaction is a case of intramolecular aldol condensation

Topic: Chemistry, Aldehydes and Ketones, JEE Main
The major product obtained in the following reaction is

Options:
A
B
C
D

The correct answer is:

Solution:
DIBAL-H (diisobutyl aluminium hydride) reduces carboxylic acid and ester to aldehydes.

Topic: Chemistry, Aldehydes and Ketones, JEE Main, JEE Main 2017 (02 Apr)
The major product obtained in the following reaction is,

Options:
A C6H5CH=CHC6H5
B +C6H5CHOtBuCH2C6H5
C -C6H5CHOtBuCH2C6H5
D ±C6H5CHOtBuCH2C6H5

The correct answer is:
C6H5CH=CHC6H5

Solution:
Tert-butyl oxide is a strong base and a weak nucleophile.

In presence of a strong base and heat, elimination reaction favours over substitution reaction.

The type of elimination taking place here is β-elimination

So, option A is the correct answer.

Topic: Chemistry, Haloalkanes and Haloarenes, JEE Main, JEE Main 2017 (02 Apr)
The major product obtained in the following reaction is:

Options:
A
B
C
D

The correct answer is:

Solution:
Given reaction is a case of intramolecular aldol condensation

Topic: Chemistry, Aldehydes and Ketones, JEE Main, JEE Main 2019 (08 Apr Shift 2)
The major product obtained in the following reaction is:

Options:
A

B

C

D

The correct answer is:

Solution:
is the order of nucleophilicity

Topic: Chemistry, Amines, JEE Main, JEE Main 2019 (09 Jan Shift 2)
The major product obtained in the following reaction is:

Options:
A

B

C

D

The correct answer is:

Solution:
LiAlH $_{4}$ is a nucleophilic reducing agent, hence it will reduce $-\mathrm{COOH}$ to $\mathrm{CH}_{2} \mathrm{OH},-\mathrm{CO}$ to $-\mathrm{CHOH}$ and $-\mathrm{NO}_{2}$ to

$\mathrm{NH}_{2}$ but does not reduce $\mathrm{C}=\mathrm{C}$ linkage.

Topic: Chemistry, Aldehydes and Ketones, JEE Main, JEE Main 2019 (11 Jan Shift 2)
The major product obtained in the following reaction is:

Options:
A

B

C

D

The correct answer is:

Solution:
Intramolecular aldol condensation

Topic: Chemistry, Aldehydes and Ketones, JEE Main, JEE Main 2019 (10 Jan Shift 2)
The major product obtained in the following reaction is:

Options:
A

B

C

D

The correct answer is:

Solution:
is the order of nucleophilicity

Topic: Chemistry, Amines, JEE Main
The major product obtained in the photo catalysed bromination of 2-methylbutane is:

Options:
A
1-bromo-2-methylbutane

B
1-bromo-3-methylbutane

C
2-bromo-3-methylbutane

D
2-bromo-2-methylbutane

The correct answer is:
2-bromo-2-methylbutane

Solution:
The order of substitution in different alkanes is
$$
3^{\circ}>2^{\circ}>1^{\circ}
$$
Thus the bromination of 2-methyl butane mainly gives 2-Bromo-2 - methyl butane

Topic: Chemistry, Haloalkanes and Haloarenes, JEE Main, JEE Main 2014 (12 Apr Online)
The major product obtained in the photobromination of 2-methyl butane is

Options:
A
2-bromo-2-methylbutane

B
1-bromo-2-methylbutane

C
1-bromo-3-methylbutane

D
2-bromo-3-methylbutane

The correct answer is:
2-bromo-2-methylbutane

Solution:
The reactivity of different types of hydrogen follows the order : benzylic $\approx$ allylic $>$ tertiary $>$ secondary $>$ primary $>$ vinylic $\approx$ aryl.

Topic: Chemistry, Haloalkanes and Haloarenes, JEE Main, JEE Main 2012 (19 May Online)
The major product obtained on interaction of phenol with sodium hydroxide and carbon dioxide is :

Options:
A
benzoic acid

B
salicylaldehyde

C
salicylic acid

D
phthalic acid

The correct answer is:
salicylic acid

Solution:
Kolbe - Schmidt reaction is

Topic: Chemistry, Alcohols Phenols and Ethers, JEE Main
The major product obtained on interaction of phenol with sodium hydroxide and carbon dioxide is :

Options:
A
benzoic acid

B
salicylaldehyde

C
salicylic acid

D
phthalic acid

The correct answer is:
salicylic acid

Solution:
Kolbe - Schmidt reaction is

Topic: Chemistry, Alcohols Phenols and Ethers, JEE Main, JEE Main 2009
The major product obtained when Br2/Fe is treated with is

Options:
A
B
C
D

The correct answer is:

Solution:
The benzene ring to which >NH group is directly attached is activated for the attack of Br+ as –NH group is highly ringh activating due to +R effect. the ring to which ƒ‚C=O group is directly attached is deactivated towards electrophillic substitution. As ƒ‚C=O group is ring deactivating due to –R effect in addition the ƒ‚NH group is ortho-para directing but para position is favourable for the attach of Br+ . Hence the product formed is as follows

Topic: Chemistry, Hydrocarbons, JEE Main
The major product of the above reaction is

Options:
A
B
C
D

The correct answer is:

Solution:
HBr⇌ H++Br-
For 1, 3-butadiene at room temperature there is formation of 1, 4- addition product

Topic: Chemistry, Hydrocarbons, JEE Main
The major product of the above reactions is

Options:
A
B
C
D

The correct answer is:

Solution:
In first step nucleophilic substitution reaction will take place. In second and third step nucleophilic addition reaction of ketone will take place and in last step reduction of cyanide will happened.

Topic: Chemistry, Haloalkanes and Haloarenes, JEE Main, JEE Main 2022 (24 Jun Shift 1)
The major product of the f following reaction is:

Options:
A
B
C
D

The correct answer is:

Solution:
In case of excess HBr, initially it will undergo electrophillic addition reaction and then it will attack on the methoxy group.

Topic: Chemistry, Hydrocarbons, JEE Main, JEE Main 2019 (08 Apr Shift 1)
The major product of the following addition reaction is

Options:
A
B
C
D

The correct answer is:

Solution:
This reaction is the halohydration of alkene. It is an electrophilic addition reaction.

Topic: Chemistry, Hydrocarbons, JEE Main, JEE Main 2019 (12 Apr Shift 1)
The major product of the following chemical reaction is :

Options:
A CH3CH2CHO
B CH3CH2CH2OH
C CH3CH2CH3
D CH3CH2CO2O

The correct answer is:
CH3CH2CHO

Solution:
Nitrile group is converted to carboxyl group when heated in acidic medium. Final product of reaction is propanaldehyde. The steps of the reaction are shown above.

Topic: Chemistry, Amines, JEE Main, JEE Main 2021 (25 Feb Shift 1)
The major product of the following reaction contains____bromine atom(s).

Options:

The correct answer is:
1

Solution:
In presence of Br2,hv allylic bromination occurs as shown above in the reaction.

Hence, the major product contains only one Br atom.

Topic: Chemistry, Alcohols Phenols and Ethers, JEE Main, JEE Main 2022 (28 Jun Shift 2)
The major product of the following reaction, if it occurs by SN2 mechanism is :

Options:
A

B

C

D

The correct answer is:

Solution:
It is a bimolecular nucleophilic substitution reaction.

Topic: Chemistry, Alcohols Phenols and Ethers, JEE Main, JEE Main 2021 (27 Aug Shift 2)
The major product of the following reaction is :

Options:
A
B
C
D

The correct answer is:

Solution:

Topic: Chemistry, Alcohols Phenols and Ethers, JEE Main
The major product of the following reaction is

Options:
A
B
C
D

The correct answer is:

Solution:

Topic: Chemistry, Amines, JEE Main
The major product of the following reaction is

Options:
A
B
C
D

The correct answer is:

Solution:
This reaction is as follows

Topic: Chemistry, Amines, JEE Main
The major product of the following reaction is

Options:
A
B
C
D

The correct answer is:

Solution:

Topic: Chemistry, Haloalkanes and Haloarenes, JEE Main
The major product of the following reaction is

Options:
A
B
C
D

The correct answer is:

Solution:
Note: Product A is major as double bond is conjugation with benzene.

Topic: Chemistry, Hydrocarbons, JEE Main
the major product of the following reaction is

Options:
A
B
C
D

The correct answer is:

Solution:
This product is highly stable conjugate di-ene system with benzene ring also so it is formed here as major product.

Topic: Chemistry, Haloalkanes and Haloarenes, JEE Main
The major product of the following reaction is:

Options:
A
B
C
D

The correct answer is:

Solution:

Topic: Chemistry, Hydrocarbons, JEE Main, JEE Main 2017 (09 Apr Online)
The major product of the following reaction is:

Options:
A CH3CH=CH-CH=CHCH3
B CH2=CHCH=CHCH2CH3
C CH3CH=C=CHCH2CH3
D CH2=CHCH2CH=CHCH3

The correct answer is:
CH3CH=CH-CH=CHCH3

Solution:

Topic: Chemistry, Haloalkanes and Haloarenes, JEE Main, JEE Main 2017 (08 Apr Online)
The major product of the following reaction is:

Options:
A
B
C
D

The correct answer is:

Solution:
has β−H. So, elimination will take place.

Topic: Chemistry, Haloalkanes and Haloarenes, JEE Main, JEE Main 2018 (08 Apr)
The major product of the following reaction is:

Options:
A
B
C
D

The correct answer is:

Solution:

Topic: Chemistry, Haloalkanes and Haloarenes, JEE Main, JEE Main 2017 (08 Apr Online)
The major product of the following reaction is

Options:
A

B

C

D

The correct answer is:

Solution:
The major product of the reaction is given by the option (c).
Since acid chloride is more reactive than alkyl halide $\mathrm{-COCl}$ group will react first.
In the second step, Friedel Craft's alkylation occurs in a position that is ortho to alkoxy group and para to methoxy group. Both methoxy and alkoxy groups are ortho para directing groups.

Topic: Chemistry, Hydrocarbons, JEE Main, JEE Main 2018 (15 Apr Shift 1 Online)
The major product of the following reaction is:

Options:
A
B
C
D

The correct answer is:

Solution:

Topic: Chemistry, Alcohols Phenols and Ethers, JEE Main, JEE Main 2017 (08 Apr Online)
The major product of the following reaction is:

Options:
A

B

C

D

The correct answer is:

Solution:
Methoxy group increases the pKa of the phenol group - it makes it less acidic. The oxygen atom does indeed exert an electron-withdrawing inductive effect, but the lone pairs on the oxygen cause the exact opposite effect So the methoxy group is an electron-donating group by resonance.

Topic: Chemistry, Alcohols Phenols and Ethers, JEE Main, JEE Main 2018 (15 Apr)
The major product of the following reaction is:

Options:
A

B

C

D

The correct answer is:

Solution:

Topic: Chemistry, Hydrocarbons, JEE Main, JEE Main 2018 (16 Apr Online)
The major product of the following reaction is:

Options:
A
B
C
D

The correct answer is:

Solution:
This is hydrohalogenation reaction of alkene. This is an electrophilic addition reaction. Addition occurs via Markovnikov's rule. HBr adds to the double bond of the styrene forming 1-bromo-1-phenylethane.

Topic: Chemistry, Haloalkanes and Haloarenes, JEE Main, JEE Main 2018 (16 Apr Online)
The major product of the following reaction is:

Options:
A
B
C
D

The correct answer is:

Solution:

Topic: Chemistry, Alcohols Phenols and Ethers, JEE Main, JEE Main 2019 (08 Apr Shift 1)
The major product of the following reaction is:

Options:
A

B

C

D

The correct answer is:

Solution:
SN2 mechanism results in the inversion of configuration. But the Inversion takes place at the carbon containing bromine atom only.

Topic: Chemistry, Haloalkanes and Haloarenes, JEE Main, JEE Main 2018 (16 Apr Online)
The major product of the following reaction is

Options:
A CH3CDICHD(Cl)
B CH3CDClCHD(I)
C CH3CD2CHCl(I)
D CH3CIClCHD2

The correct answer is:
CH3CIClCHD2

Solution:
Addition according to Markovnikov’s Rule

Topic: Chemistry, Hydrocarbons, JEE Main, JEE Main 2019 (09 Apr Shift 1)
The major product of the following reaction is:

Options:
A
B
C
D

The correct answer is:

Solution:

Topic: Chemistry, Haloalkanes and Haloarenes, JEE Main, JEE Main 2019 (08 Apr Shift 2)
The major product of the following reaction is:

Options:
A

B
C
D

The correct answer is:

Solution:
Alkaline KMnO4 oxidise benzylic carbon to the carboxylic acid.

Alkenes react with acidified potassium permanganate. Potassium Permanganate is a strong oxidant, and will initially convert the double bond to two alcohol (OH) groups.

Topic: Chemistry, Carboxylic Acid Derivatives, JEE Main, JEE Main 2019 (09 Apr Shift 1)
The major product of the following reaction is

Options:
A
B
C
D

The correct answer is:

Solution:
Free-radical polymerization (FRP) is a method of polymerization, by which a polymer forms by the successive addition of free-radical building blocks. Free radicals can be formed by a number of different mechanisms, usually involving separate initiator molecules.

Topic: Chemistry, Hydrocarbons, JEE Main, JEE Main 2019 (09 Apr Shift 1)
The major product of the following reaction is:

Options:
A
B
C
D

The correct answer is:

Solution:
E2 reaction is a single step reaction in which a strong base is used to attack on the reactant for removing leaving group. Now Alkene is formed. Now proton attacks on carbonyl compound to form carbocation which later shows freidel craft acylation reaction.

As shown below:

Topic: Chemistry, Haloalkanes and Haloarenes, JEE Main, JEE Main 2019 (08 Apr Shift 2)
The major product of the following reaction is

Options:
A

B

C

D

The correct answer is:

Solution:

Topic: Chemistry, Alcohols Phenols and Ethers, JEE Main, JEE Main 2019 (09 Apr Shift 1)
The major product of the following reaction is,

Options:
A RCOOH
B RCHO
C RCH2NH2
D RCONH2

The correct answer is:
RCHO

Solution:
In the first step, RCN gets reduced to RCH=NH, which then gets hydrolyzed to RCH=O.

Topic: Chemistry, Coordination Compounds, JEE Main, JEE Main 2019 (09 Jan Shift 1)
The major product of the following reaction is:

Options:
A

B

C

D

The correct answer is:

Solution:

Topic: Chemistry, Amines, JEE Main, JEE Main 2019 (09 Jan Shift 2)
The major product of the following reaction is:

Options:
A
B
C
D

The correct answer is:

Solution:
In polar protic solvent SN1 mechanism is favourable hence reaction complete via SN1 mechanism.

Topic: Chemistry, Haloalkanes and Haloarenes, JEE Main, JEE Main 2019 (10 Apr Shift 1)
The major product of the following reaction is:

Options:
A

B

C

D

The correct answer is:

Solution:

Topic: Chemistry, Alcohols Phenols and Ethers, JEE Main, JEE Main 2019 (11 Jan Shift 1)
The major product of the following reaction is

Options:
A

B

C

D

The correct answer is:

Solution:

Topic: Chemistry, Aldehydes and Ketones, JEE Main, JEE Main 2019 (11 Jan Shift 1)
The major product of the following reaction is:

Options:
A

B

C

D

The correct answer is:

Solution:

Topic: Chemistry, Haloalkanes and Haloarenes, JEE Main, JEE Main 2019 (11 Jan Shift 2)
The major product of the following reaction is

Options:
A

B

C

D

The correct answer is:

Solution:
Initially 2-hydroxy toluene reacts with sodium hydroxide to form acid-base reaction and by following this reaction nucleophile is form which later shows nucleophilic substitution reaction as shown below:

Topic: Chemistry, Alcohols Phenols and Ethers, JEE Main, JEE Main 2019 (10 Jan Shift 2)
The major product of the following reaction is:

Options:
A

B

C

D

The correct answer is:

Solution:
NaBH4 selectively reduces >C=O group to >CH|OH and imine group to amine.

Topic: Chemistry, Aldehydes and Ketones, JEE Main, JEE Main 2019 (10 Jan Shift 2)
The major product of the following reaction is:

Options:
A

B

C

D

The correct answer is:

Solution:
Addition of alc. KOH to haloalkanes follows the Saytzeff rule which points towards greater stability. Saytzeff's rule implies that elimination reactions favour formation of alkene with greater number of substituents.
Not only that, but it also gives the molecule an extended conjugate system which further enhances its stability.

Topic: Chemistry, Hydrocarbons, JEE Main, JEE Main 2019 (10 Jan Shift 1)
The major product of the following reaction is :

Options:
A

B

C

D

The correct answer is:

Solution:
Alkaline $\mathrm{KMnO}_{4}$ is a strong oxidising agent and oxidises $-\mathrm{CH}_{3}$ as well as $-\mathrm{CO}$ group to $-\mathrm{COOH}$

Topic: Chemistry, Carboxylic Acid Derivatives, JEE Main, JEE Main 2019 (11 Jan Shift 1)
The major product of the following reaction is:

Options:
A

B

C

D

The correct answer is:

Solution:
In Fischer projection formula
→β-H present and leaving group Cl- is moderate leaving group so more stable alkene, i.e., Saytzeff product will form.

Topic: Chemistry, Hydrocarbons, JEE Main, JEE Main 2019 (12 Jan Shift 2)
The major product of the following reaction is:

Options:
A

B

C

D

The correct answer is:

Solution:
Initially chlorine adds to the double bond, followed by internal friedel crafts alkylation.

Topic: Chemistry, Hydrocarbons, JEE Main, JEE Main 2019 (12 Jan Shift 1)
The major product of the following reaction is:

Options:
A

B

C

D

The correct answer is:

Solution:

Topic: Chemistry, Haloalkanes and Haloarenes, JEE Main, JEE Main 2019 (12 Jan Shift 2)
The major product of the following reaction is:

Options:
A

B

C

D

The correct answer is:

Solution:

Topic: Chemistry, Amines, JEE Main, JEE Main 2019 (12 Jan Shift 2)
The major product of the following reaction is:

Options:
A

B

C

D

The correct answer is:

Solution:
Nitriles are selectively reduced by DIBAL-H to imines followed by hydrolysis to aldehydes. Similarly, esters are also reduced to aldehyde with DlBAL-H

Topic: Chemistry, Aldehydes and Ketones, JEE Main, JEE Main 2019 (12 Jan Shift 1)
The major product of the following reaction is:

Options:
A

B

C
D

The correct answer is:

Solution:
NaB H 4 is a strong reducing agent as it can reduce carboxylic acids, aldehydes, and ketones. But it cannot reduce double bonds.

Topic: Chemistry, Aldehydes and Ketones, JEE Main, JEE Main 2019 (12 Jan Shift 2)
The major product of the following reaction is :

Options:
A
B
C
D

The correct answer is:

Solution:
H+ is attached to -OH group to make it good leaving group and elimination takes place and alkene is formed as it is in conjugation with carbonyl group.

Topic: Chemistry, Alcohols Phenols and Ethers, JEE Main, JEE Main 2020 (05 Sep Shift 2)
The major product of the following reaction is:

Options:
A
B
C
D

The correct answer is:

Solution:
This is electrophilic substitution reaction which is determine by electronic effect of OH\CH3\NO2.

Electrophilic attacks in influence of activating group -OH so it is attached at para position with respect to -OH group.

Topic: Chemistry, Hydrocarbons, JEE Main, JEE Main 2020 (02 Sep Shift 2)
The major product of the following reaction is :

Options:
A
B
C
D

The correct answer is:

Solution:

Topic: Chemistry, Hydrocarbons, JEE Main, JEE Main 2020 (06 Sep Shift 1)
The major product of the following reaction is:

Options:
A
B
C
D

The correct answer is:

Solution:
Alcohol upon reaction with protic acids tends to lose a molecule of water to form alkenes. These reactions are known as dehydrogenation or dehydration of alcohols. It is an example of an elimination reaction. Its rate varies for primary, secondary and tertiary alcohols.

Topic: Chemistry, Alcohols Phenols and Ethers, JEE Main, JEE Main 2020 (08 Jan Shift 1)
The major product of the following reaction is :

Options:
A
B
C
D

The correct answer is:

Solution:

Topic: Chemistry, Hydrocarbons, JEE Main, JEE Main 2021 (25 Feb Shift 2)
The major product of the following reaction is:

Options:
A
B
C
D

The correct answer is:

Solution:

Topic: Chemistry, Aldehydes and Ketones, JEE Main, JEE Main 2021 (27 Aug Shift 1)
The major product of the following reaction is :

Options:
A
B
C
D

The correct answer is:

Solution:
NaOH and C2H5OH is alcoholic NaOH which is used for dehydrohalogenation of alkenes. This beta elimination is anti-elimination and Saytzeff alkene (more stable) is major product. In the given reaction, more stable conjugated alkene is formed as major product.

Note : There is ambiguity in answer given by NTA which is 4.

Topic: Chemistry, Haloalkanes and Haloarenes, JEE Main, JEE Main 2021 (31 Aug Shift 2)
The major product of the following reaction is

Options:
A
B
C
D

The correct answer is:

Solution:

Topic: Chemistry, Hydrocarbons, JEE Main
The major product of the following reaction is

Options:
A

B

C

D

The correct answer is:

Solution:

Topic: Chemistry, Aldehydes and Ketones, JEE Main
The major product of the following reaction is :

Options:
A
B
C
D

The correct answer is:

Solution:

Topic: Chemistry, Aldehydes and Ketones, JEE Main
The major product of the following reaction is:

Options:
A
B
C
D

The correct answer is:

Solution:

Topic: Chemistry, Carboxylic Acid Derivatives, JEE Main
The major product of the following reaction is:

Options:
A
B
C
D

The correct answer is:

Solution:

Topic: Chemistry, Alcohols Phenols and Ethers, JEE Main
The major product of the following reaction is:
CH3CH=CHCO2CH3→LiAlH4

Options:
A CH3CH2CH2CO2CH3
B CH3CH=CHCH2OH
C CH3CH2CH2CH2OH
D CH3CH2CH2CHO

The correct answer is:
CH3CH=CHCH2OH

Solution:
LiAlH4 convert ester into alcohol by reduction, it does not reduce π bond between carbon atoms.

Topic: Chemistry, Carboxylic Acid Derivatives, JEE Main
The major product of the following reaction is:
CH3CH=CHCO2CH3→LiAlH4

Options:
A CH3CH2CH2CO2CH3
B CH3CH=CHCH2OH
C CH3CH2CH2CH2OH
D CH3CH2CH2CHO

The correct answer is:
CH3CH=CHCH2OH

Solution:
LiAlH4 convert ester into alcohol by reduction, it does not reduce π bond between carbon atoms.

Topic: Chemistry, Carboxylic Acid Derivatives, JEE Main, JEE Main 2019 (09 Apr Shift 1)
The major product of the following reaction is :

CH3CH2CH=CH2→Rh catalystH2/CO

Options:
A CH3CH2CH=CH-CHO
B

CH3CH2CH2CH2CHO

C CH3CH2CH2CHO
D

The correct answer is:

CH3CH2CH2CH2CHO

Solution:
OXO PROCESS (Hydroformylation) is the addition of a hydrogen atom and a formyl group to the molecule of a compound containing a double bond by reaction with hydrogen and carbon monoxide, the chief product being one or more aldehydes.

CH3-CH2-CH=CH2→Rh catalystH2/COCH3CH2CH2CHO

Topic: Chemistry, Aldehydes and Ketones, JEE Main, JEE Main 2021 (25 Feb Shift 2)
The major product of the following reaction is \(P\).
\(\mathrm{CH}_3 \mathrm{C}=\mathrm{C}-\mathrm{CH}_3 \xrightarrow[\substack{\text { (ii) dil. } \mathrm{KMnO}_4 \\ 273 \mathrm{~K}}]{\text { (i) } \mathrm{Na} / \text { ing } \mathrm{NH}_3} '^{\prime}\)
Number of oxygen atoms present in product ' \(\mathrm{P}\) ' is _______ (nearest integer)

Options:

The correct answer is:
2

Solution:

Topic: Chemistry, Hydrocarbons, JEE Main, JEE Main 2024 (06 Apr Shift 1)
The major product of the following reaction is

Options:
A
B
C
D

The correct answer is:

Solution:
It is a case of intramolecular aldol condensation which occurs as follows

Topic: Chemistry, Aldehydes and Ketones, JEE Main