Organic chemistry

Daffodil International University Department of Nutrition and Food Engineering Faculty of Health and Life Sciences B.Sc. in Nutrition and Food Engineering Midterm Examination Fall 2026 Course Code: 0531-1201 Course Title: Organic Chemistry Level and Term: L-1, T-2 Section: 262 All Course Teacher Initials: DMR, DFR, SKP Time: 1 hour 30 minutes Total Marks: 25 Maintaining the order of the questions is highly appreciated Marks 1 (a) Write down the IUPAC names of the following organic compounds. [CLO1, PLO1, C1] 2 i) [Figure: Chemical structure showing CH3-CH2-CH(C2H5)-CH2-C(CH3)2-CH2-CH3] ii) [Figure: Chemical structure showing CH3-CH2-C(Cl)(CH3)-COOH] (b) Show the possible structural isomers of C4H10O. [CLO1, PLO1, C1] 3 2 (a) Differentiate between addition and elimination reactions with examples. [CLO1, PLO1, C2] 2 (b) Write the structure of the following compounds. [CLO1, PLO1, C2] 3 i)3-ethyl-2,4-dimethylhexane (ii) 3-ethyl-4,5-dimethyloct-2-ene (iii) 3,5-dimethylheptan-3-ol 3 (a) Identify the following as nucleophilic or electrophilic reagents with justifications: [CLO1, PLO1, C3] 2 i) H2O, ii) OH-, iii) SO3, iv) NH3 (b) Explain: (i) Why are alkanes almost insoluble in water? (ii) Why does a cis-isomer generally have a higher boiling point than its corresponding trans-isomer? [CLO1, PLO1, C3] 3 4 (a) How does combustion of an alkane cause environmental problems? [CLO2, PLO2, C3] 2 (b) Explain the mechanism for the chlorination of an alkane. [CLO2, PLO2, C3] 3 5 (a) Explain why a branched-chain alkane has a lower boiling point than its straight-chain isomer. [CLO2, PLO2, C4] 2 (b) Outline the mechanism of addition of Br2 to CH2=CH2. [CLO2, PLO2, C4] 3