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Aldehyde ketones and acids
Course: ORGANIC CHEMISTRY-I
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University: Amity University
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Name : ÉÉÉÉÉÉÉÉÉÉÉÉ.
ALDEHYDE KETONES AND ACIDS (IMP QUESTIONS)
1. Write the equations involved in the following reactions:
a. Wolff-Kishner reduction
b. Etard reaction
c. Stephen reduction
2. Write the reagents required in the following reactions:
a. CH2 = CH−CH2OH → CH2 = CHÐCHO
b. CH3 Ð COOH → CH3−CONH2
3. Arrange the following compounds in increasing order of their property as indicated:
a. CH3COCH3, C6H5COCH3, CH3CHO (reactivity towards nucleophilic addition reaction)
b. Cl−CH2−COOH, F −CH2−COOH, CH3−COOH (acidic character)
4. Give simple chemical tests to distinguish between the following pairs of compounds:
a. Ethanal and Propanol
b. Benzoic acid and Phenol
5. Write the equation involved in the acetylation of Salicylic acid.
6. Give the structure of A, B and C in the following reactions:
7. Predict the products of the following reactions:
8. Write structures of compounds A, B and C in each of the following reactions:
9. Do the following conversions in not more than two steps:
a. Benzoic acid to benzaldehyde
b. Ethyl benzene to Benzoic acid
c. Propanone to Propene
10. Predict the products of the following reactions:
11. Although pentoxide ion has more number of resonating structures than Carboxylate ion, Carboxylic acid is a stronger acid than
phenol. Give two reasons.
12. How would you account for the following:
a. Aldehydes are more reactive than ketones towards nucleophiles.
b. The boiling points of aldehydes and ketones are lower than of the corresponding acids.
c. The aldehydes and ketones undergo a number of addition reactions.
13. Give chemical tests to distinguish between:
a. Acetaldehyde and benzaldehyde
b. Propanone and propanol
14. Illustrate the following name reactions by giving example.
a. CannizzaroÕs reaction
b. Clemmensen reduction
c. Hell-Volhard-Zelinsky reaction
15. An organic compound A contains 69.77% carbon, 11.63% hydrogen and rest oxygen. The molecular mass of the compound is 86.
It does not reduce TollenÕs reagent but forms and addition compound with sodium hydrogen sulphite and gives positive iodoform
test. On vigorous oxidation it gives ethanoic and propanoic acid. Derive the possible structure of compound A.
16. How are the following obtained?
a. Benzoic acid form ethyl benzene.
b. Benaldehyde from toluene.
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