Chemistry - Hydrocarbons
Practise 5 IAT (IISER) previous year questions on Hydrocarbons, compiled from papers spanning 2022 to 2025. Each question is pulled directly from the actual exam paper it appeared in, so you're practising in the exact style and difficulty IAT (IISER) tests.
Hydrocarbons has been asked in 3 of the 9 years of IAT (IISER) papers analysed (2017–2026), with 5 questions in all. 20% of them were easy, 60% moderate and 20% tough. Most of its questions came from 2022, with 2 questions that year. In the last three years (2023–2026) it had 2 questions across 3 papers, about 0.7 per paper.
The chapter's 4 topics are not weighted equally: Reactions of alkenes (2 questions, 40%), Preparation and Properties of Benzene (1 question, 20%), and Reactions of aromatic compounds (1 question, 20%) have been asked the most. Reactions of alkenes has also led over the last five years, with 2 questions. Reactions of alkenes has produced the most tough questions (1).
- 1Compound I undergoes hydroboration-oxidation reaction with followed by treatment with and aqueous NaOH to produce another compound II, which2025Reactions of alkenes
- 2What are and in the following sequence of reactions?2024Reactions of alkynes
- 3Which one amongst the following is the most efficient way of synthesizing -propyl benzene?2023Reactions of aromatic compounds
- 4Choose the correct statement about the structure of fullerene.2022Preparation and Properties of Benzene
- 5The major product of the following reaction is2022Reactions of alkenes
Frequently Asked Questions
1.How many questions are available for Hydrocarbons?
This chapter includes 5 questions compiled from IAT (IISER) papers spanning 2022 to 2025.
2.Are these questions only from IAT (IISER), or from other exams too?
These are IAT (IISER) 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 IAT (IISER) Chemistry?
Hydrocarbons has appeared in 4 of the 10 years of IAT (IISER) papers covered here, with 5 questions across 4 papers - about one per paper it appears in.
4.What is the difficulty level of Hydrocarbons questions in IAT (IISER)?
Of the 5 questions analysed for this chapter, 20% are easy, 60% moderate and 20% tough. 2022 had the most, with 2 questions.
5.Which topics in Hydrocarbons should I focus on?
These topics have carried the most weightage in Hydrocarbons:
- Reactions of alkenes - 2 questions (40%)
- Preparation and Properties of Benzene - 1 question (20%)
- Reactions of aromatic compounds - 1 question (20%)
- Reactions of alkenes has produced the most tough questions (1).
6.Is Hydrocarbons's weightage in IAT (IISER) going up or down?
Across all 4 papers analysed, Hydrocarbons has averaged about 1.3 questions per paper. In the last three years (2023–2026), that average has fallen, at about 0.7 questions per paper. Use the year-wise numbers on this page for the exact trend before you decide how much time to give it.