File Details:

{"filename":"bsc-3-year-chemistry-organic-chemistry-us-15166-2019.pdf","description":"This file contains the B.Sc. Third Year examination paper for Organic Chemistry (Code: B-307) from the Annual Main Examination 2019. It includes descriptive questions focusing on organic reactions, stereochemistry, polymers, biomolecules, and their applications."}

Questions:

  1. Describe the decreasing order of 8-values for R-CH3, Ar-H, and R-CH=CH2 hydrogens.
  2. An organic compound gives IR absorptions at 1715 cm and a single NMR peak at =2.1. Identify the compound.
  3. A hydrocarbon with molecular mass 102 exhibits two PMR signals at 2.6 (5H) and 6.92 (1H). Deduce its structure.
  4. Explain the polymer formed by glycine and -amino caproic acid.
  5. Describe the splitting pattern and intensity of peaks for hydrogens in CICH2-C(CI)-CH3.
  6. Compare the coupling constants (J) for allylic protons and ortho-aromatic protons.
  7. Discuss the PMR signals for CH3-CH2-CH-CH2-COOH.
  8. Calculate the value of chemical shift () in ppm for a proton resonating at 126 Hz downfield from TMS on a 60 MHz spectrophotometer.
  9. Interpret the structure of a compound given PMR peaks at 7.22, 3.59, 2.77, and 0.97.
  10. Identify the alcohol having molecular formula CHO that shows C-O stretching at 1120 cm.
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