Applied Engineering Chemistry 2014 Question Paper — Government Colleg…
The 2014 Applied Engineering Chemistry previous year question paper (Government College of Engineering and Technology, Jammu), with every question and its marks.
- University: Government College of Engineering and Technology, Jammu
- Subject: Applied Engineering Chemistry
- Course: Engineering Chemistry
- Year: 2014
- Paper: end-term
- Duration: 180 minutes
- Total marks: 100
Instructions
- Attempt any Five questions, selecting at least two from each section.
Questions
Section- A
- Q1. a) "A conjugated diene absorbs at a higher wavelength with higher value of extinction coefficient as compared to a diene in which double bond are isolated." (6) b) Explain the various application of the ultra-violet spectroscopy. (7) c) Define the term 'chromophore'. How will you detect the presence of carbonyl group in aldehyde and ketones? (7) [20 marks]
- Q2. a) Write the preparation and uses of the following explosives. (i) Nitroglycerine (ii) Dynamite (iii) Gunpowder (iv) RDX (4×5) [20 marks]
- Q3. a) Describe briefly the theory of NMR spectroscopy. What can be obtained from the NMR absorption peaks? (10) b) A compound with molecular formula $C_7H_5OCl_3$ shows a three-proton singlet at $\delta$ 3.9 and two one proton doublet (J=8Hz) at $\delta$ 6.76 and 7.3. Identify the compound. (4) c) Name some important solvents, used in NMR spectroscopy. What are the important characteristics of the solvents in this technique? (6) [20 marks]
- Q4. a) Distinguish between the following two isomers of the molecular formula $C_3H_6O$ (i) $CH_3CH_2CHO$ (ii) $CH_3COCH_3$ (6) b) Discuss all types of stretching and bending vibrations. (7) c) Describe some characteristic absorption bands with their region for the following. functional groups. (i) Aldehydes (ii) Esters (iii) Anhydrides (iv) Amides (v) Ketones (vi) Ethers (vii) Alcohol. (7) [20 marks]
Section- B
- Q5. a) What is meant by 'oiliness' of a lubricant? How can this be improved? (6) b) Describe the various factors involved in the selection of a lubricants. (7) c) Explain the term boundary lubrication and fluid-film lubrication and mention the condition therein. (7) [20 marks]
- Q6. a) Define Drug and give the applications of following drugs. (i) Narcotics (ii) Tranquilizers (iii) Antipyretics (iv) Antibiotics (4×5) [20 marks]
- Q7. a) Explain the term alloy. State purpose of alloying with suitable examples. (7) b) What is the effect of nickel chromium and tungsten on properties of alloy steel. (7) c) Write short notes on bronzes. (6) [20 marks]
- Q8. a) Discuss stereoisomerism of an organic compound containing one asymmetric carbon atom. (7) b) What are the racemic and mesotartaric acids? Which of them can be separated into optically active enantiomers. (6) c) What is specific rotation of an optically active compound? How would you determine it by a polarimeter. (7) [20 marks]