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Group A (1 Mark):
Group B (3 Marks):
Group C (10 Marks):
Not all sources online are reliable. Many websites upload fabricated or out-of-syllabus papers. Here are the best sources: Calcutta University B Sc Chemistry Question Paper
(Marks: 15)
5. Answer any five questions from the following: $1 \times 5 = 5$
a) What are enantiomers? b) Give an example of a heterocyclic compound. c) What is the product of the hydrolysis of ethyl acetate? d) Define "optical activity". e) What is the hybridization of the carbon atom in a carbocation? f) Arrange the following in order of increasing nucleophilicity: $NH_2^-, OH^-, F^-$. g) Write the IUPAC name of $CH_3-CH(OH)-CH_2-CHO$. Note: Always scan PDFs for viruses before downloading
6. Answer any two questions from the following: $5 \times 2 = 10$
a) Discuss the SN1 and SN2 mechanisms of nucleophilic substitution. Explain how the rate of reaction depends on the concentration of the nucleophile and substrate in each case. b) Define Geometrical Isomerism. Explain geometrical isomerism in maleic acid and fumaric acid. Which of these shows optical activity and why? c) Define inductive effect and resonance effect. Explain the directive influence of the $-OH$ group in electrophilic aromatic substitution reactions (e.g., nitration of phenol).