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NEET Hydrocarbons PYQs with Solutions

757 previous year questions from Hydrocarbons (NEET UG Chemistry) with answers and solutions. Numbered list, year tags, and one-tap solutions — built for serious JEE / NEET practice.

757 questionsChemistry2002–2026Answers + solutions

About Hydrocarbons PYQs

Hydrocarbons has 757 previous year questions in the Quantrex Academy NEET UG Chemistry bank. The 220 questions in this list come from NEET (172), JIPMER (29) and MHT CET Medical (19), spanning 2002 to 2026. Each question opens on its own page with the options, the correct answer and the worked solution where available.

NEET Hydrocarbons PYQs with Solutions

About Hydrocarbons PYQs

Questions by year (this list)

Hydrocarbons questions with solutions

H_3C-CH=CH_2 + H-Br (C_6H_5CO)_2O_2,\ Benzoyl peroxide H_3C-CH_2-CH_2-Br Which of the following rules is followed when the above reaction occurs?

Which of the following reagent is NOT required for the conversion of propyne to acetone?

Palladised charcoal with quinoline is known as

Chlorination of alkane is a photochemical process. It is initiated by the process of

Identify A and B in above reaction.

Chlorobenzene is formed by the reaction between benzene and chlorine in presence of AlCl_3 . Which of the following species actually attacks the benzene ring in this reaction?

Identify the product obtained when toluene reacts with chlorine in the presence of FeCl_3 .

In the combustion reaction of alkanes, if 1 mole of ethane is burnt, find number of moles of oxygen required?

Chlorobenzene on reaction with acetyl chloride in presence of anhydrous aluminum chloride forms,

What is the major product obtained by oxidation of phenylethene with KMnO_4 in dilute H_2SO_4 ?

Identify the products when benzene reacts with chlorine in the presence of (I) Fe and (II) anhydrous AlCl_3 respectively from the following.

Identify the type of reaction when benzene reacts with nitrating mixture.

Which of the following gases is evolved as a byproduct (A) in the following reaction, HC + LiNH_2 solvent HC=C^-Li^+ + (A)

Which of the following alkenes forms formaldehyde and acetaldehyde on ozonolysis?

Aldehydes and Ketones can be converted to alkanes using (A). LiAlH_4 / H_3 O^+ (B). Zn-Hg/ conc^n HCl (C). NH_2 -NH_2 / KOH in ethylene glycol (D). K_2 Cr_2 O_7 / dil.H_2 SO_4

Identify the major product of the reaction between propene and HBr in the presence of peroxide.

Which one of the following alkenes forms the same product with HBr in the absence as well as in the presence of peroxide?

What is the general molecular formula for alkenes?

Which of the following types exhibits 100\% atom economy?

Consider the following reaction, and choose the correct option.

Given below are two statements: Statement I: trans -But-2-ene upon treatment with Br _2 in CCl _4 gives the following product Statement II: cis -But-2-ene upon treatment with

Among the following, the compound having conjugated double bonds is

For the following reaction sequence, choose the correct option

Two products X and Y are formed in the following reaction sequence. C_6H_6 + CH_3Cl Anhydr. AlCl_3 W [warm] dil. HNO_3 + dil. H_2SO_4 X + Y The suitable method that can be used

The number of chlorine atoms present in the organic products X and Y of the following reactions, respectively, are : C_6H_6 + 6Cl_2 [dark, cold] Anhydr. AlCl_3 X C_6H_6 + 3Cl_2

Consider the following reaction sequences and choose the correct option.

Which one of the following compounds does not decolourize bromine water?

Which one of the following reactions does NOT give benzene as the product?

The major product X formed in the following reaction sequence is:

The alkane that can be oxidized to the corresponding alcohol by KMnO_4 as per the equation is, when:

Identify the correct reagents that would bring about the following transformation.

The correct order for the rate of α, β -dehydrohalogenation for the following compounds is

The major product of the following chemical reaction is:

The major product formed in the dehydrohalogenation reaction of 2 -Bromopentane is Pent 2 -ene. This product formation is based on?

The intermediate compound ' X ' in the following chemical reaction is:

Reagent R will be:

Which of the following is a free radical substitution reaction?

Elimination reaction of 2 -Bromo-pentane to form pent- 2 -ene is (a) β -Elimination reaction (b) Follows Zaitsev rule (c) Dehydrohalogenation reaction (d) Dehydration reaction

Which of the following alkane cannot be made in good yield by Wurtz reaction?

An alkene on ozonolysis gives methanal as one of the product. Its structure is

Glucose HCN X Hydrolysis Y Red P+HI Z IUPAC name of Y and Z

CH ≡ CH [H_2 O] Hg^ 2+ / H^ + A LiAlH_4 ~B P / Br_2 C final product C is

If react with Cl_2 in presence of light and then react with Na metal in dry ether, final product is

The alkane that gives only one mono-chloro product on chlorination with Cl_2 in presence of diffused sunlight is

The most suitable reagent for the following conversion, is:

In the following reaction, the number of sigma( σ ) bonds present in the product A is

An alkene ' A ' on reaction with O _ 3 and Zn - H _ 2 O gives propanone and ethanal in equimolar ratio. Additional of HCl to alkene ' A ' gives ' B ' as the major product. The

Identify the major products P, Q and R in the following sequence of reactions:

Hydrocarbon (A) reacts with bromine by substitution to form an alkyl bromide which by Wurtz reaction is converted to gaseous hydrocarbon containing less than four carbon atoms.

Which of the following is the major product in the reaction of HOBr with propene?

1-butyne on oxidation with hot alkaline KMnO_4 would yield. Which of the following as end product?

Clemmensen reaction of ketone is carried out in the presence of

Which among the following depicts the correct order of acidity?

In the reaction, How many electron donating groups are attached with the carbon atom of unsaturated part of the product ' B ' ?

Which of the following hydrocarbons is the most reactive towards addition of H_2 SO_4 ?

Which of the following compounds shall not produce propene by reaction with HBr followed by elimination or direct only elimination reaction?

In the reaction X and Y are:

For the following reactions: a. CH _ 3 CH _ 2 CH _ 2 Br + KOH → CH _ 3 CH = CH _ 2 + KBr + H _ 2 O b. c. Which of the following statements is correct?

The compound that will react most readily with gaseous bromine has the formula:

In the given reaction, the product P is

Consider the nitration of benzene using mixed conc. H _ 2 S O _ 4 and HN O _ 3 . If a large amount of KHS O _ 4 is added to the mixture, the rate of nitration will be:

Δ H and Δ S for the reaction, Ag_2 O(s) 2 Ag(s)+(1)/(2) O_2(~g) , are 30.56 ~kJ ~mol^ -1 and 66.00 JK^ -1 ~mol^ -1 respectively. The temperature at which the free energy change

Find out the correct stereoisomeric product for the following reaction,

X, Y and Z respectively are

In the reaction with HCl , an alkene reacts following the Markovnikov&#39;s rule to give the product 1 - chloro - 1 - methylcyclohexane. The possible reaction of the alkene is

2,3-Dimethyl-2-butene can be prepared by heating which of the following compounds with a strong acid?

The oxidation of benzene by V _ 2 O _ 5 in the presence of air produces:

The reaction of C _ 6 H _ 5 CH = CHC H _ 3 with HBr produces:

Given, The enthalpy of hydrogenation of these compounds will be in the order as:

Which one of the following is aromatic?

Identify Z in the sequence of reactions:

Addition of water to alkynes occurs in acidic medium and in the presence of Hg^ 2+ ions as a catalyst. Which of the following products will be formed on addition of water to

Identify the major product ' X ' obtained in the following reaction. 2, 3-dimethyl butan -2- ol Conc. H_2 SO_4 X

Phenol is distilled with Zn dust followed by Friedel-Crafts alkylation with propyl chloride in the presence of AlCl_3 to give a compound (b). (b) is oxidised in the presence of

The structure of isobutyl group in an organic compound is

Nitrobenzene on reaction with conc. HNO_3 / H_2 SO_4 at 80-100^ ∘ C forms which one of the following products?

In the reaction with HCl , an alkene reacts following the Markovnikov's rule to give the product 1 - chloro - 1 - methylcyclohexane. The possible reaction of the alkene is