Hydrocarbons: Alkanes JEE Main PYQs PDF, 2020–2026

Hydrocarbons: Alkanes questions per year

in the free PDF asked, not in the PDFThe PDF only has questions we can print in full with a checked answer, so it holds 28 of the 35 asked.

Topic-wise weightage by year

How many Hydrocarbons: Alkanes questions each topic had in every JEE Main year (all shifts), counting every question asked, including ones not in the PDF. Darker cells mean more questions.

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Newest questions (2026)

All 8 JEE Main 2026 Hydrocarbons: Alkanes questions in the free PDF, latest shift first. The 2026 papers asked 9 in all.

1. JEE Main 2026 · 8 Apr · Shift 2 · Free Radical Halogenation

   n-Butane on monochlorination under photochemical condition gives an optically active compound " P ". " P " on further chlorination gives dichloro compounds.

   The number of dichloro compounds obtained (ignore stereoisomers) is :

   Solve it online →

2. JEE Main 2026 · 6 Apr · Shift 1 · Preparation of Alkanes

   Given below are two statements :

   Statement I : Methane can be prepared by decarboxylation of sodium ethanoate, Kolbe's electrolysis of sodium acetate and reaction of ${\mathrm{CH}}_{3}{\mathrm{MgBr}}$ with water.

   Statement II : Methane cannot be prepared from unsaturated hydrocarbons and by Wurtz reaction.

   In the light of the above statements, choose the correct answer from the options given below

   Solve it online →

3. JEE Main 2026 · 6 Apr · Shift 2 · Free Radical Halogenation

   An alkane $(Y)$ requires 8 moles of oxygen for complete combustion and on chlorination with ${\mathrm{Cl}}_{2}/{\mathrm{h}}\nu,({\mathrm{Y}})$ gives only one monochlorinated product $({\mathrm{Z}})$. The total number of primary carbon atoms in $(Y)$ is $\_\_\_\_$ .

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4. JEE Main 2026 · 5 Apr · Shift 2 · Preparation of Alkanes

   RMgI when treated with ice cold water liberated a gas which occupied $1.4{\mathrm{dm}}^{3}/{\mathrm{g}}$ at STP. The gas produced is further reacted with iodine in presence of ${\mathrm{HIO}}_{3}$ to give compound $({\mathrm{X}})$. Compound $({\mathrm{X}})$ in presence of Na and dry ether produced compound $({\mathrm{Y}})$. Molar mass of compound $({\mathrm{Y}})$ is $\_\_\_\_$ ${\mathrm{g}}{\mathrm{mol}}^{{-1}}$. (Nearest integer)

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5. JEE Main 2026 · 2 Apr · Shift 1 · Free Radical Halogenation

   Consider the isomers of hydrocarbon with molecular formula $C_{5}H_{{10}}$. These isomers do not decolourise $KMnO_{4}$ solution. These isomers are subjected to chlorination with chlorine in presence of light to give monochloro compounds. The total number of monochloro compounds (structural isomers only) formed is ________.

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6. JEE Main 2026 · 2 Apr · Shift 1 · Combustion and Cracking

   One mole of an alkane (x) requires 8 mole oxygen for complete combustion. Sum of number of carbon and hydrogen atoms in the alkane (x) is ________.

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7. JEE Main 2026 · 2 Apr · Shift 2 · Combustion and Cracking

   The compound (X) on

   (i) on heating in the presence of anhydrous AlCl₃ and HCl gas gives 2,4-dimethyl pentane

   (ii) aromatization gives toluene and

   (iii) cyclisation gives methyl cyclohexane

   The correct name of compound (X) is:

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8. JEE Main 2026 · 28 Jan · Shift 2 · Combustion and Cracking

   The reactions which produce alcohol as the product are :

   A. ${\mathrm{CH}}_{4}+{\mathrm{O}}_{2}{{}\xrightarrow{{\mathrm{Mo}}_{2}{\mathrm{O}}_{3},\ \Delta\;}}$

   B. $2{\mathrm{CH}}_{3}{\mathrm{CH}}_{3}+3{\mathrm{O}}_{2}{{}\xrightarrow{({\mathrm{CH}}_{3}{\mathrm{COO}})_{2}{\mathrm{Mn}},\ \Delta\;}}$

   C. $({\mathrm{CH}}_{3})_{3}{\mathrm{CH}}{{}\xrightarrow{{\mathrm{KMnO}}_{4}\;}}$

   D. $2{\mathrm{CH}}_{4}+{\mathrm{O}}_{2}{{}\xrightarrow{{\mathrm{Cu}}/523\ {\mathrm{K}}/100\ {\mathrm{atm}}.\;}}$

   E. ${\mathrm{CH}}_{3}-{\mathrm{CH}}={\mathrm{CH}}-{\mathrm{CH}}_{3}{{}\xrightarrow{{\mathrm{KMnO}}_{4}/{\mathrm{H}}^{+}\;}}$

   Choose the correct answer from the options given below :

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Sample questions from recent papers

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