NEET ChemistryNCERT Class 11Hydrocarbons

Hydrocarbons: NEET questions with solutions

NEET tests preparation routes (Wurtz, Kolbe, partial reduction of alkynes), addition to alkenes with Markovnikov and peroxide-effect regiochemistry, ozonolysis read backwards to the alkene, conformations of ethane, Hückel aromaticity and directive influence in benzene. Marks are lost by applying the peroxide effect to HCl, by forgetting that Kolbe doubles the alkyl group, and by choosing the wrong order of substitution steps.

Revise first: NCERT notes for Hydrocarbons

Questions

10 questions · answers after you pick

1Propene reacts with HBr in the dark and with no peroxide present. What is the major product?Addition of hydrogen halides to alkenesEasySingle correct 2Which hydrocarbon reacts with sodium metal to liberate hydrogen gas and form a sodium salt?Acidic character of alkynesEasySingle correct 3Which statement about the conformations of ethane is correct?Conformations of ethaneEasySingle correct 4An alkene C₅H₁₀ on ozonolysis (O₃, then Zn/H₂O) gives propanone and ethanal. What is the alkene?Ozonolysis of alkenesMediumSingle correct 5Propene is treated with HCl in the presence of benzoyl peroxide. Judge the Assertion (A) and the Reason (R) below.Peroxide effectMediumAssertion–Reason 6A concentrated aqueous solution of sodium propanoate is electrolysed. Which alkane is formed at the anode?Preparation of alkanesMediumSingle correct 7Benzene was once drawn with alternating single and double bonds. Which of the statements below about its structure and aromaticity are…Benzene structure and aromaticityMediumStatement based 8A substituent already on a benzene ring decides where the next electrophile goes and how fast. Match each substituent in List I with its…Directive influence of functional groupsMediumMatch the following 9Starting from benzene, which sequence gives 1-bromo-3-nitrobenzene (m-bromonitrobenzene) as the major product?Electrophilic substitution in benzeneHardSingle correct 10Pent-2-yne is reduced in two separate experiments: (i) with H₂ over Lindlar's catalyst to give X, and (ii) with sodium in liquid ammonia to…Preparation of alkenes from alkynesHardSingle correct

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