Engineering Chemistry Unit 5 – Polymers and Organometallic Compounds: AKTU previous year questions
44 AKTU questions from Unit 5 (Polymers and Organometallic Compounds) asked in 2021–2026, tagged by marks, year and topic. In short: about 26 marks of every paper come from this unit; the most asked topic is Classification of Polymers (14 times); 37 questions came back in a later year. The latest ones are listed below; on the page you can filter them by 2-mark or long questions, topic and repeats.
Unit 5 previous year questions
- What are polymer blends? Give one example. (2 marks, 2026, Polymer Blends and Composites)
- What are conducting polymers? Explain their classification and applications with suitable examples. (7 marks, 2026, Classification of Polymers)
- Explain the preparation, properties and applications of Grignard reagent (RMgX). Write reactions of ethyl magnesium bromide with: (i) HCHO (ii) CH₃CHO (iii) (CH₃)₂CO (7 marks, 2026, Organometallic Compounds)
- Write the preparation, properties and uses of the following polymers: (i) Dacron (ii) Bakelite (iii) Nylon-6,6 (7 marks, 2026, Industrial Polymers Properties Applications)
- Ethan (C2H6) not forms polymer but ethene (C2H4) forms polymer why? (2 marks, 2025, Polymerization Processes)
- Why can thermosetting polymers not be reshaped upon heating, while thermoplastic polymers can? (2 marks, 2025, Classification of Polymers)
- What is conducting polymer? Which conducting polymer is generally use in electronic touch screen. Give the Advantages and limitations of conducting polymers. (7 marks, 2025, Classification of Polymers)
- Discuss the primary degradation mechanisms that affect polymer stability in different environmental conditions. (7 marks, 2025, Classification of Polymers)
- What are organ metallic compounds? How is Grignard reagent prepared? Give the reaction of CH3CH2MgBr with HCHO, CH3CHO and CH3COCH3? (7 marks, 2025, Organometallic Compounds)
- Why is it necessary to perform the preparation of Grignard reagents under anhydrous conditions? If 5.0 g of methylmagnesium bromide is reacted with an excess of benzaldehyde, how much benzyl alcohol (C₆H₅CH₂OH) is expected, assuming 85% yield? (7 marks, 2025, Organometallic Compounds)
- What is Vulcanization of rubber? Write down the preparation and uses of (any three): (i) Nylon-6,6 (ii) Bakelite (iii) BUNA-N (iv) Neoprene Rubber (v) Teflone. (7 marks, 2025, Industrial Polymers Properties Applications)
- Explain why water and oils do not adhere to Teflon. How does this property make it suitable for non-stick cookware and industrial applications? A piece of Teflon has a mass of 250 g and a density of 2.2 g/cm³. Calculate its volume. (7 marks, 2025, Industrial Polymers Properties Applications)
Most asked Unit 5 topics
- Classification of Polymers – asked 14 times
- Industrial Polymers Properties Applications – asked 12 times
- Organometallic Compounds – asked 12 times
Unit 5 question pattern
- 2-mark questions: 14 asked in 2021–2026
- 7-mark questions: 21 asked in 2021–2026
- 10-mark questions: 9 asked in 2021–2026
- About 26 marks from Unit 5 in every paper
- 37 questions were asked again in a later year
Unit 5 questions year by year
- 2026: 4 Unit 5 questions asked (23 marks across that year's papers)
- 2025: 8 Unit 5 questions asked (46 marks across that year's papers)
- 2024: 8 Unit 5 questions asked (46 marks across that year's papers)
- 2023: 9 Unit 5 questions asked (48 marks across that year's papers)
- 2022: 10 Unit 5 questions asked (68 marks across that year's papers)
- 2021: 5 Unit 5 questions asked (34 marks across that year's papers)