The document contains an internal assessment test for 5th semester undergraduate chemistry students. It includes 8 questions testing students' knowledge of amino acid structures, synthesis of phenylalanine from glycine, reaction mechanisms and stereochemistry, stability of Dewar benzene and its conversion to benzene, reaction of D-glucose with phenylhydrazine, equilibrium of D-glucose forms in different solvents, and synthesis of phenanthrene via the Bardhan-Sengupta method. Students must answer any 5 of the 8 questions in 30 minutes as part of their coursework evaluation.

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TAMRALIPTA MAHAVIDYALAYA
Department of Chemistry
UG Vth Semester Internal Assessment test-I :: Session : 2023-24
Course: CHEMISTRY (H) Paper – C12T Date: 20-12-2023 (Wednesday)
Name of Teacher: Dr Satyajit Dey
Full Marks: 10 Time: 30 Minutes
Answer any five questions 5 x 2 =10
Q1. Give the structures of the following amino acids at pH = 6.02 with proper reasoning.
i) lysine ii) aspartic acid
Q2. Outline the synthesis of phenyl alanine starting from glycine.
Q3. Predict the product with stereochemical outcome of the following reaction and show the
mechanism with the help of orbital (HOMO) interaction.
Q4. Although Dewar benzene is less stable than its isomer benzene by 71 Kcal / mole, its conversion
into benzene is extremely slow with an Eact of about 37 Kcal / mole. Justify.
Q5. What happens when D(+)-Glucose is treated with excess of phenyl hydrazine?
Q6. In anhydrous methanol the equilibrium mixture of D(+)-Glucose contain 50% of the α-form,
whereas in water it is about 38%. Why?
Q7. Predict product with mechanism
Q8. Write the steps of the Bardhan-Sengupta method of synthesis of phenanthrene