How to prepare for Hydrocarbons for CUET-UG ?
Expected Weightage
The Common University Entrance Test (CUET) for Chemistry, particularly the Hydrocarbons chapter, has shown specific trends in marking patterns and weightage over the last three years (2021-2023). Below is a detailed analysis:
1. Chapter-wise Weightage (Hydrocarbons)
Hydrocarbons is a crucial chapter under Organic Chemistry , contributing 6-8 marks (approx. 10-12% weightage) in CUET Chemistry.
Year-wise Breakdown:
| Year | No. of Questions | Marks | Weightage (%) |
|---|---|---|---|
| 2023 | 3-4 | 12 | ~10% |
| 2022 | 2-3 | 6-9 | ~8% |
| 2021 | 2-4 | 6-12 | ~7-10% |
2. Sub-topic-wise Distribution
The chapter is divided into Alkanes, Alkenes, Alkynes, and Aromatic Hydrocarbons , with varying emphasis:
| Sub-topic | Weightage (2021-2023) | Key Topics Asked |
|---|---|---|
| Alkanes | 20-25% | Preparation, Wurtz reaction, Combustion |
| Alkenes | 30-35% | Markovnikov’s rule, Ozonolysis, Addition reactions |
| Alkynes | 20-25% | Acidity, Preparation (Dehydrohalogenation) |
| Aromatic Hydrocarbons | 25-30% | Electrophilic substitution, Friedel-Crafts reactions |
3. Marking Pattern
- Correct Answer: +5 marks (CUET follows a fixed marking scheme).
- Incorrect Answer: -1 mark (Negative marking applicable).
- Unattempted: 0 marks.
4. Trend Analysis
- Increasing Focus on Reactions Mechanisms (e.g., Electrophilic addition in alkenes, Benzene reactions).
- More Application-based Questions (e.g., Predicting products, IUPAC naming).
- Aromatic Hydrocarbons gained slightly more weightage in 2023.
5. Preparation Tips
- Focus on name reactions (e.g., Friedel-Crafts, Wurtz).
- Practice conversion-based questions (e.g., Alkane → Alkene → Alkyne).
- Revise IUPAC nomenclature and isomerism.
Conclusion
Hydrocarbons remains a high-weightage chapter (6-12 marks), with Alkenes Aromatic Hydrocarbons being the most tested. Expect 2-4 questions in CUET 2024, primarily from reaction mechanisms and properties.
Would you like a topic-wise PYQ breakdown for deeper analysis?
BETA
