Exam Details
| Subject | Organic Reaction Mechanism | |
| Paper | ||
| Exam / Course | Bachelor Degree Programme(Elective Course: Chemistry) | |
| Department | School of Sciences (SOS) | |
| Organization | indira gandhi national open university | |
| Position | ||
| Exam Date | December, 2015 | |
| City, State | new delhi, |
Question Paper
Identify the electrophiles/nucleophiles giving reason for your choice; in the following
AlC13, CH3NH2, CH2O, CH3COC1
Define and give one example for Carbenes or Benzynes.
Which of the following would undergo faster SNl reaction and why?
(CH3)3C1 or (CH3CH2)2CHI
(CH3)2CHI or (CH3)2CHC1
Give the mechanism of either Perkin reaction or Cannizzaro reaction.
Give three features that distinguish between El and E2 reactions.
Taking propene as an example, calculate the Average Oxidation State of carbon.
Give the synthesis of aspirin from sodium phenoxide.
How is acetoacetic ester prepared Outline the conversion of acetoacetic ester to succinic acid.
How will you obtain ethanol from a suitable Grignard reagent?
Differentiate between hemiacetal and acetal.
Describe the nature and formation of free radicals.
Explain molecular rearrangement, giving a suitable example.
What is Huckel's rule Explain the aromatacity of toluene on the basis of this rule.
What is hydroboration Outline its mechanism.
Give the mechanism of electrophilic substitution in benzene, giving the possible resonating structures of the intermediate. 3
Differentiate between photochemical and thermal reactions.
Differentiate between Saytzeff's and Hofmann's rule. Predict the product and give the mechanism of the following reaction:
Br
CH3 — CH2 — CH — CH3 KOH
Explain the terms 'auxochrome' and 'chromophore' giving two examples each.
Complete any five of the following reactions:
<img src='./qimages/13765-7b.jpg'>
What is ozonolysis Predict the product of oxidative ozonolysis of the following:
Describe in brief the evidences supporting the mechanism ofE2 reaction.
AlC13, CH3NH2, CH2O, CH3COC1
Define and give one example for Carbenes or Benzynes.
Which of the following would undergo faster SNl reaction and why?
(CH3)3C1 or (CH3CH2)2CHI
(CH3)2CHI or (CH3)2CHC1
Give the mechanism of either Perkin reaction or Cannizzaro reaction.
Give three features that distinguish between El and E2 reactions.
Taking propene as an example, calculate the Average Oxidation State of carbon.
Give the synthesis of aspirin from sodium phenoxide.
How is acetoacetic ester prepared Outline the conversion of acetoacetic ester to succinic acid.
How will you obtain ethanol from a suitable Grignard reagent?
Differentiate between hemiacetal and acetal.
Describe the nature and formation of free radicals.
Explain molecular rearrangement, giving a suitable example.
What is Huckel's rule Explain the aromatacity of toluene on the basis of this rule.
What is hydroboration Outline its mechanism.
Give the mechanism of electrophilic substitution in benzene, giving the possible resonating structures of the intermediate. 3
Differentiate between photochemical and thermal reactions.
Differentiate between Saytzeff's and Hofmann's rule. Predict the product and give the mechanism of the following reaction:
Br
CH3 — CH2 — CH — CH3 KOH
Explain the terms 'auxochrome' and 'chromophore' giving two examples each.
Complete any five of the following reactions:
<img src='./qimages/13765-7b.jpg'>
What is ozonolysis Predict the product of oxidative ozonolysis of the following:
Describe in brief the evidences supporting the mechanism ofE2 reaction.
Other Question Papers
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Subjects
- Biochemistry
- Inorganic Chemistry
- Organic Chemistry
- Organic Reaction Mechanism
- Physical Chemistry
- Spectroscopy