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Hydrocarbons — JEE Main & Advanced NSEC PYQs

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

29 questionsNSECSolutions on every page
1

The reaction of 1-phenylpropane with limited amount of chlorine in the presence of light gives mainly

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The reaction of an olefin with HBr can proceed by ionic as well as radical mechanism. The reaction in the presence of light takes place by radical mechanism, as

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3-Methylpentane on monochlorination gives four possible products. The reaction follows free radical mechanism. The relative reactivities for replacement of -H are 3^0: 2^0: 1^0=6:

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Which of the following on treatment with hot concentrated acidified KMnO ₄ will give 2-methylhexane-1,6-dioic acid as the only organic product?

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Spodoptol, a sex attractant, produced by a female fall armyworm moth, can be prepared as follows. The structure of Spodoptol is ( p K a : terminal alkynes 25 , alcohols 17 )

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Terpinen-4-ol is an active ingredient in tea tree oil has the following structure The correct observations for terpinen-4-ol is/are I. It rotates the plane of plane polarized light

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Addition of bromine to cis-3-hexene gives

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Compound ' X ' in the following reaction is

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The sequence of reagents required for the following conversion is

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The correct sequence of reagents from those listed below for the following conversion is I. NaNH ₂ II. Br ₂ III. H ₂ / Pd - C , quinoline IV. H ₃ O ⁺

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The reactions from those given below that involve a carbocation intermediate are

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The major product ' X ' formed in the following reaction is

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Which of the following is/are electrophilic aromatic substitution reaction/s?

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The reaction of 2,4-hexadiene with one equivalent of bromine at 0^ C gives a mixture of two compounds ' X ' and ' Y '. If ' X ' is 4,5-dibromohex-2-ene, ' Y ' is

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Number of products formed (ignoring stereoisomerism) in the monochlorination of ethylcyclohexane is

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The major product of the following reaction is

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The structure that represents the major intermediate formed in the bromination of toluene is

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The product/s formed in the following reaction is/are

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The correct sequence of reactions which will yield 4-nitrobenzoic acid from benzene is

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The correct statement/s among the following is/are

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Two isomeric hydrocarbons ' X ' and ' Y ' ( C ₄ H ₆ ) , give the same product ( C ₄ H ₈ O ) on catalytic hydration with dilute acid. However, they form different products but with

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In a pair of isomers of molecular formula C ₅ H ₈ , both the compounds undergo catalytic hydrogenation to form compounds of molecular formula C ₅ H ₁₀ . On ozonolysis followed by o

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A chiral hydrocarbon (Molecular Formula C ₆ H ₁₂ ) undergoes catalytic hydrogenation to yield an achiral product (Molecular Formula C ₆ H ₁₄ ). The chiral hydrocarbon is

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The correct order of the given reagents to convert benzene to m-Chlorobromobenzene is (1) sulfuric acid (conc.) and heat (2) Cl ₂+ FeCl ₃ and heat (3) NaNO ₂+ H ₃ O ⁺0^ C (4) H ₂ P

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The product/s obtained on reaction of biphenyl ( Ph - Ph ) with nitrating mixture ( HNO ₃+ H ₂ SO ₄ ) is/are:

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An alkane [ X ] contains five 1^ , two 2^ , one 3^ and one 4^ carbon atoms. The IUPAC name of [ X ] is:

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Predict the major product in the following reaction. PCC is pyridinium chlorochromate

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At 0^ C , 1 equivalent bromine is added to 2,4 -hexadiene to produce 4,5 -dibromo- 2 -hexene and its isomer ' X '. ' X ' is:

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Chlorination of propane gives four dichloro products. One of them is optically active. The number of trichloro products possible from the optically active dichloro product is (excl

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