Chemistry - Hydrocarbons
Practise 24 NEST (NISER) previous year questions on Hydrocarbons, compiled from papers spanning 2011 to 2026. Each question is pulled directly from the actual exam paper it appeared in, so you're practising in the exact style and difficulty NEST (NISER) tests.
Hydrocarbons has been asked in 14 of the 16 years of NEST (NISER) papers analysed (2011–2026), with 24 questions in all. 0% of them were easy, 83% moderate and 17% tough. Most of its questions came from 2021, with 4 questions that year. In the last three years (2024–2026) it had 6 questions across 4 papers, about 1.5 per paper.
The chapter's 8 topics are not weighted equally: Reactions of aromatic compounds (9 questions, 38%), Reactions of alkenes (6 questions, 25%), and Reactions of alkynes (3 questions, 13%) have been asked the most. Reactions of aromatic compounds has also led over the last five years, with 3 questions. Reactions of aromatic compounds has produced the most tough questions (4).
- 1tert-Butylbenzene reacts with 1-chloro-2-methylpropane in the presence of anhydrous . The major product in this reaction is:2026Reactions of aromatic compounds
- 2Acetylene is passed through red hot iron tube at K to produce P. P reacts with chlorine gas in the presence of anhydrous to produce Q. Q rea2026Reactions of alkynes
- 31,2-dimethylbenzene on treatment with chromic oxide in acetic anhydride at K followed by hydrolysis produces P. P on heating with concentrat2026Reactions of Benzene
- 4Cyclopentene is transformed into 1,2,3-tribromocyclopentane in two steps. The correct order of reagents required to carry out this transform2025Reactions of alkenes
- 5Consider the following compound. The major product in an aromatic electrophilic substitution reaction ( electrophile) on the given compound 2025Reactions of aromatic compounds
- 6Aqueous solution of sodium salt of 2-methylbutanoic acid on Kolbe electrolysis yields (major product). is2024 (Session 1)Properties and Preparation of Alkanes
- 7In an electrophilic addition reaction of olefins, the stability of carbocations plays a crucial role. Consider the compounds and that can un2023 (Session 2)Reactions of alkenes
- 8One mole of toluene on reaction with 2 moles of in the presence of light gives , which on hydrolysis at gives Y . Y on reaction with conc. a2023 (Session 2)Reactions of aromatic compounds
- 9A mixture containing almost equal quantities of all dimethylbenzenes is reacted with two equivalents of methyl chloride in the presence of a2021 (Session 1)Reactions of aromatic compounds
- 10In the addition reaction of propene with bromine water, propene first reacts with to form the bromonium ion intermediate and bromide ion. Th2021 (Session 1)Reactions of alkenes
- 11The product of the reaction of styrene with diborane , followed by reaction with alkaline hydrogen peroxide is2021 (Session 2)Reactions of alkenes
- 12The addition of hydrogen bromide to 1,3-butadiene at two different temperatures give two products in different amounts as given below. In th2021 (Session 2)Preparation and Reactions of Conjugate Dienes
- 13For the above reaction sequence, and are2020 (Session 1)Reactions of alkynes
- 14The number of optically active compound(s) obtained upon complete ozonolysis of the following optically active compound is2019 (Session 2)Reactions of alkenes
- 15Hydrogenation of cyclohexene and benzene take place as shown below. The resonance energy of benzene is The relationship between and is2018Reactions of Benzene
- 16The reaction of an acid chloride with an aromatic compound in the presence of a Lewis acid to give an acylated aromatic compound is called F2017Reactions of aromatic compounds
- 17In the following reactions, X and Y respectively are2015Reactions of alkynes
- 18Compound has four possible nuclear mono nitro derivatives. On oxidation it gives which can have three possible mono nitro derivatives. The c2015Reactions of aromatic compounds
- 19The major products obtained when a mixture of cyclohexane and cyclopentane is heated to in the presence of Pt are2015Reactions of alkanes
- 20Aromatic compounds can be halogenated using molecular halogen in the presence of an acid. Benzene when treated with molecular bromine in the2014Reactions of aromatic compounds
- 21Benzene is reacted with limited amount of methyl chloride in the presence of anhydrous aluminium chloride to obtain X . X on reaction with b2013Reactions of aromatic compounds
- 22The nitration of toluene takes place at the ortho, para and meta positions, giving ortho-, para-, and meta- nitrotoluenes, respectively. Ass2013Reactions of aromatic compounds
- 23Naphthalene is an aromatic compound and is the largest single component of coal tar. To prove the structure of naphthalene, Graebe (1869) ca2012Preparation and Properties of Benzene
- 24The main product of the following reaction is2011Reactions of alkenes
Frequently Asked Questions
1.How many questions are available for Hydrocarbons?
This chapter includes 24 questions compiled from NEST (NISER) papers spanning 2011 to 2026.
2.Are these questions only from NEST (NISER), or from other exams too?
These are NEST (NISER) questions specifically for the Hydrocarbons chapter. Questions from other exams like JEE Main or NTA Abhyas (JEE Main) are organised separately under their respective exam sections.
3.Is Hydrocarbons an important chapter for NEST (NISER) Chemistry?
Hydrocarbons has appeared in 14 of the 16 years of NEST (NISER) papers covered here, with 24 questions across 15 papers - about 2 per paper it appears in.
4.What is the difficulty level of Hydrocarbons questions in NEST (NISER)?
Of the 24 questions analysed for this chapter, 0% are easy, 83% moderate and 17% tough. 2021 had the most, with 4 questions.
5.Which topics in Hydrocarbons should I focus on?
These topics have carried the most weightage in Hydrocarbons:
- Reactions of aromatic compounds - 9 questions (38%)
- Reactions of alkenes - 6 questions (25%)
- Reactions of alkynes - 3 questions (13%)
- Reactions of aromatic compounds has produced the most tough questions (4).
6.Is Hydrocarbons's weightage in NEST (NISER) going up or down?
Across all 15 papers analysed, Hydrocarbons has averaged about 1.6 questions per paper. In the last three years (2024–2026), that average has stayed about the same, at about 1.5 questions per paper. Use the year-wise numbers on this page for the exact trend before you decide how much time to give it.