MERIT YARD

Class 11th Hydrocarbons - JAC PYQs - MERIT YARD

Question 1 / 4 JAC 2024Which of the following is an example of an Alkyne?

A) C₂H₆

B) C₂H₄

C) C₂H₂

D) CH₄

Question 2 / 4 JAC 2023, 2019The Kolbe’s electrolysis of sodium acetate gives:

A) Methane

B) Ethane

C) Propane

D) Ethene

Question 3 / 4 JAC 2022Which catalyst is used in Friedel-Crafts alkylation of Benzene?

A) Anhydrous AlCl₃

B) Pd/BaSO₄

C) V₂O₅

D) Ni/H₂

Question 4 / 4 JAC 2020The number of σ and π bonds in Benzene (C₆H₆) are:

A) 6σ, 3π

B) 9σ, 3π

C) 12σ, 3π

D) 12σ, 6π

Question 5 / 40 VVI 2026Which is the most stable conformation of n-butane?

A) Eclipsed

B) Anti / Staggered

C) Gauche

D) Partially Eclipsed

Question 6 / 40 JAC 2024Ozonolysis of Ethene gives which product?

A) Formaldehyde (HCHO)

B) Acetaldehyde

C) Acetone

D) Formic acid

Question 7 / 40 JAC 2019Geometrical isomerism (cis-trans) is shown by:

A) 2-Butyne

B) 2-Butene

C) 1-Butene

D) Propene

Question 8 / 40 JAC 2023The hybridization of carbon in Benzene is:

A) sp³

B) sp²

C) sp

D) dsp²

Question 9 / 40 VVI 2026Wurtz reaction of methyl bromide gives:

A) Methane

B) Ethane

C) Propane

D) Butane

Question 10 / 40 JAC 2022Lindlar's catalyst is used for the preparation of:

A) cis-Alkenes

B) trans-Alkenes

C) Alkanes

D) Alkynes

Question 11 / 40 JAC 2024Presence of three π-bonds and one ring makes which molecule aromatic?

A) Cyclohexane

B) Benzene

C) Toluene

D) Cyclopentadiene

Question 12 / 40 JAC 2023Anti-Markownikoff addition of HBr to Propene occurs in the presence of:

A) Peroxide

B) Sunlight

C) AlCl₃

D) Fe

Question 13 / 40 JAC 2021Ethyne on passing through red hot iron tube gives:

A) Ethene

B) Benzene

C) Methane

D) Ethane

Question 14 / 40 VVI 2026The bond angle H-C-H in Methane is:

A) 120°

B) 109.5°

C) 180°

D) 90°

Question 15 / 40 JAC 2019General formula of Alkenes is:

A) C_nH_2n

B) C_nH_2n+2

C) C_nH_2n-2

D) C_nH_n

Question 16 / 40 JAC 2024Markownikoff's rule is used for:

A) Addition reaction

B) Substitution reaction

C) Elimination reaction

D) Polymerization

Question 17 / 40 JAC 2023Acidic hydrogen is present in:

A) Ethane

B) Ethene

C) Ethyne

D) Benzene

Question 18 / 40 JAC 2022Huckel's rule for aromaticity is:

A) (4n+2)π electrons

B) (4n)π electrons

C) (2n+2)π electrons

D) 6π electrons only

Question 19 / 40 VVI 2026Bayer's reagent is:

A) Cold alkaline KMnO₄

B) Acidic KMnO₄

C) Neutral KMnO₄

D) Bromine water

Question 20 / 40 JAC 2024Nitration of Benzene is an example of:

A) Electrophilic Substitution

B) Nucleophilic Substitution

C) Free radical addition

D) Elimination

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