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FIFTH SEMESTER (CBCSS—UG) DEGREE EXAMINATION
NOVEMBER 2022
Chemistry
CHE 5B 07—ORGANIC CHEMISTRY-II
(2019 Admission onwards)

Time : Two Hours Maximum : 60 Marks
Section A (Short Answers)

Answer questions up to 20 marks.
Each question carries 2 marks.

1. The boiling points of alcohols are much higher than the corresponding aliphatic hydrocarbons.
Why ?

2. What is PCC ? Name the molecule formed when CH,-CH,-CH,-OH is treated with PCC ?
3. What are crown ethers ? Give two examples.

4. Name the product formed for the following reaction

CH MgBr + 009 0 >

5. What are Frankland’s reagents ? How are they prepared ?
6. Suggest a suitable reagent for the following conversion
Benzoyl] chloride —» Benzaldehyde
7. How will you convert toluene to benzaldehyde ?
8. Which among the following is a stronger acid, p-nitrobenzoic acid or benzoic acid ? Why ?
9. How will you convert acetic acid to propanoic acid ?
10. CH,-CH,-NO, reacts with NaOH. Why ?
11. How will you convert benzoic acid to aniline ?
12. Pyridine is less basic than aliphatic amines. Why ?

(Ceiling of marks : 20)

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