NEET Chemistry / AI question bank / NCERT Class 11 / Hydrocarbons
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.
Also called: alkanes, alkenes and alkynes · aromatic hydrocarbons · benzene
Questions
10 questions / answers after you pick
- Q1Propene reacts with HBr in the dark and with no peroxide present. What is the major product?
Addition of hydrogen halides to alkenesEasySingle correct
- Q2Which hydrocarbon reacts with sodium metal to liberate hydrogen gas and form a sodium salt?
Acidic character of alkynesEasySingle correct
- Q3Which statement about the conformations of ethane is correct?
Conformations of ethaneEasySingle correct
- Q4An alkene C₅H₁₀ on ozonolysis (O₃, then Zn/H₂O) gives propanone and ethanal. What is the alkene?
Ozonolysis of alkenesMediumSingle correct
- Q5Propene is treated with HCl in the presence of benzoyl peroxide. Judge the Assertion (A) and the Reason (R) below.
Peroxide effectMediumAssertion–Reason
- Q6A concentrated aqueous solution of sodium propanoate is electrolysed. Which alkane is formed at the anode?
Preparation of alkanesMediumSingle correct
- Q7Benzene 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
- Q8A 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
- Q9Starting from benzene, which sequence gives 1-bromo-3-nitrobenzene (m-bromonitrobenzene) as the major product?
Electrophilic substitution in benzeneHardSingle correct
- Q10Pent-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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