2nd Year Chemistry Chapter 13 Carboxylic Acids Notes

chemistry 12th notes chapter No 13

1. The flavor of amyl acetate is:

 
 
 
 

2. Of the following four reactions, formic acid and acetic acid differ in which respect?

 
 
 
 

3. Which of the following esters shows the flavour of orange:

 
 
 
 

4. The organic acid that does not have carboxyl group is:

 
 
 
 

5. Phathalic acid is a:

 
 
 
 

6. Which compound is polyprotic acid?

 
 
 
 

7. Molar mass of CH₃COOH obtained by elevation of boiling point method is:

 
 
 
 

8. Which of the following is neutral amino acid:

 
 
 
 

9. Glacial acetic acid is miscible in all proportions with:

 
 
 
 

10. The amino acids which cannot be synthesized by our body are:

 
 
 
 

11. The reagent used to convert carboxylic acid directly to alkane is

 
 
 
 

12. Freezing point of acetic acid is:

 
 
 
 

13. Acetamide is prepared by:

 
 
 
 

14. In amino acid proton is transferred from one point to the other point and  this dipolar ion is called:

 
 
 
 

15. The general formula of monocarboxylic acid:

 
 
 
 

16. Reverse of esterification is known as:

 
 
 
 

17. Which of following is commonly known as vinegar:

 
 
 
 

18. Carboxylic acids on reaction with Lithium hydride are reduced to:

 
 
 
 

19. By convention a peptide having molecular mass upto 10,000 is called:

 
 
 
 

20. Which one of the following element is not present in all proteins:

 
 
 
 

21. Some amino acids are most important because they are the final product of  hydrolysis of peptide and protein and they are:

 
 
 
 

22. Which of the following is not a fatty acid?

 
 
 
 

23. The molecular mass of protein is:

 
 
 
 

24. Weakest acid among the followings is:

 
 
 
 

25. Sodium acetate and Acetyl chloride react to give:

 
 
 
 

26. Toluene can be oxidized to Benzoic acid by:

 
 
 
 

27. Which one of the following is not an amino acid:

 
 
 
 

28. Which of the following derivative can’t be prepared directly from acetic  acid:

 
 
 
 

29. Which acid is used in the manufacture of synthetic fiber?

 
 
 
 

30. Hydrolysis of an ester gives a carboxylic acid which on Kolbe’s electrolysis yields ethane, the ester is

 
 
 
 

31. The weakest carboxylic acid:

 
 
 
 

32. Which of the following is the strongest acid:

 
 
 
 

33. Acetic acid and formic acid, both exist as cyclic dimer in vapour state because of:

 
 
 
 

34. Which one of the following products is not formed when acetic acid reacts with PCl₅?

 
 
 
 

35. Dipolar structure of zwitterions is also called:

 
 
 
 

36. Which of the following is the strongest acid:

 
 
 
 

37. Acetic acid is obtained when

 
 
 
 

38. Which one of the following metal can evolve hydrogen from acetic acid:

 
 
 
 

39. Ethyl alcohol reacts with acetyl chloride to form:

 
 
 
 

40. Glacial Acetic acid at 17 ⁰C is:

 
 
 
 

41. Which one of the following is an unsaturated carboxylic acid?

 
 
 
 

42. The solution of the acid used for seasoning of food is:

 
 
 
 

43. Acetic acid is manufactured commercially by:

 
 
 
 

44. Nature of Glycine amino acid is:

 
 
 
 

45. Which product is not formed when acetic acid reacts with SOCl₂ (Thionyl  chloride):

 
 
 
 

46. Amino acids are prepared by:

 
 
 
 

47. The amino acid which body can synthesize are called:

 
 
 
 

48. Amino acids can be synthesized by reaction of α-Bromo acid with:

 
 
 
 

49. Carboxylic acids are more acidic than phenol and alcohol because of:

 
 
 
 

50. Tyrosine was first isolated from

 
 
 
 

51. Which of following derivative cannot be prepared directly from acetic acid?

 
 
 
 

52. Which of the following will react with both ethanol and ethanoic acid at  room temperature:

 
 
 
 

53. Carboxylic acid can be changed to acid chloride by the treatment with:

 
 
 
 

54. When two moles of acetic acid are heated with P₂O₅ the product formed is:

 
 
 
 

55. Ninhydrin reacts with amino acid to form product which has colour:

 
 
 
 

56. When Ethyl alcohol is oxidized with K₂Cr₂O₇ and dilute H₂SO₄ , which of the following is produced:

 
 
 
 

57. Which reagent is used to reduce a carboxylic group to an alcohol?

 
 
 
 

58. Which Ester is used for the flavor of Banana:

 
 
 
 

59. Which one of the following reagent is used to convert acetic acid to ethane?

 
 
 
 

60. Which one of the following is not a dicarboxylic acid:

 
 
 
 

61. Organic compounds having fruity smell are:

 
 
 
 

62. The simplest of all amino acid:

 
 
 
 

63. Amino acids are classified into following types:

 
 
 
 

64. Slight oxidation of primary alcohol gives:

 
 
 
 

65. Which acid of the following is not a fatty acid?

 
 
 
 

66. The boiling points of the Carboxylic acid are:

 
 
 
 

67. Acetic acid was first isolated from:

 
 
 
 

68. Reaction of acids with alcohols is known as:

 
 
 
 

69. The carbon atom of a carbonyl group is:

 
 
 
 

70. H₂SO₄ to produce:

 
 
 
 

71. Zwitterion is also called:

 
 
 
 

Short Questions

1. Define neutral amino acids with example.
2. Define Zwitter ion or internal salt?
3. Differentiate between acidic and basic amino acids.
4. Give an example of each i.e a-amino acid B-amino acid andy-amino acid?
5. Give the mechanism for the esterification of carboxylic acid?
6. Give the mechanism for the reaction of carboxylic acids with SOCI₂ to give acid chlorides?
7. Give two reactions of carboxylic acids which show their acidic nature?
8. How a-amino acid can be converted into a-hydroxy acids?
9. How acetic acid is prepared on the commercial scale from acetylene?
“10. How acetic acid reacts with?
a. PCl₃ b. SOCl₂ “
11. How amino acid is prepared by Strecker’s synthesis?
12. How carboxylic acid can be obtained from alkene?
13. How carboxylic acids are converted into a-amino acids?
14. How carboxylic acids are prepared by the oxidative cleavage of alkenes?
15. How do carboxylic acids react with HI?
16. How do you differentiate between protein and polypeptide?
17. How ethanol is converted to CH₃COOH?
18. How the hydrolysis of nitriles give carboxylic acids?
19. How two functional groups create one functional group in carboxylic acids?
20. How will you convert acetic acid into acetamide?
21. How will you convert acetic acid into methane and acetic anhydride?
22. How would you convert CH₃COOH to CH₃CONH₂?
23. Name at least five dicarboxylic acids and give their formulas?
24. Prepare ethane from acetic acid by reduction.
25. What are acidic amino acids? Give two examples.
26. What are amino acids?
27. What are aromatic carboxylic acids?
28. What are basic amino acids? Give two examples.
29. What are carboxylic acids? Give their general formula. Why they are soluble in water?
30. What are dimmers of carboxylic acids? Why do they have high B.P? Give example.
31. What are essential and non-essential amino acids?
32. What are fatty acids?
33. What are fatty acids? How acid chlorides are made by them?
34. What are hydroxyl acids? Give four examples of hydroxyl acids i.e. two from open chain and two from closed chain?
35. What are neutral amino acids? Give two examples.
36. What are peptides and peptide linkages?
“37. What happens when following compounds are heated:
i. Calcium acetate ii. Ammonium acetate “
“38. What happens when following compounds are heated:
i. Sodium formate and Soda lime ii. Ammonium acetate “
39. What is difference between essential and non-essential amino acids?
40. What is glacial acetic acid?
41. What is meant by Glacial acetic acid?
42. What is ninhydrin test?
43. What is peptide bond? Write formula of a dipeptide.
44. What is polypeptide ?
45. What is Strecker’s synthesis?
46. What is Zwitterion?
47. Where are acid anhydrides and how are they produced?
48. Why do mostly carboxylic acids exist as dimers?
49. Why the B.P of aliphatic carboxylic acids are relatively high or than corresponding aldehydes and ketones?
50. Write formulae of Glycine and Alanine.
“51. Write reactions of acetic acid with:
i. HI/Red Phosphorus
ii. NH₃, Heat “
52. Write structural formulae of Phthalic acid and Malonic acid.
53. Write the formulas for valeric acid caproic acid caprylic acid stearic and palmitic acid?

Long Questions

1. Write your methods for the preparation of carboxylic acids.
“2. Prepare acetic acid from
a) Methyl nitrile b) Acetylene”
3. Write down any four methods for preparation of carboxylic acids.
4. Write down any three methods to prepare acetic acid. What is glacial acetic acid.
5. How would you prepare carboxylic acid from primary alcohols and aldehydes?
“6. Write the reactions of acetic acid with:
(i) Na₂CO (ii) NaHCO₃ (iii) NaOH (iv) Na”
7. Write down the reactions of acetic acid with: (i) Na₂CO₃ (ii) PCI₅ (iii) C₂H₅OH (iv) NH₃
8. Write down the mechanism of conversion of acetic acid to: (i) Acetyl Chloride (ii) Acetamid
9. Write down mechanism of reaction between acetic acid and thionyl chloride.
10. Discuss mechanism of esterification between a carboxylic acid and alcohol.
“11. How would you convert acetic acid into the following compounds:
i) Methane ii) Ethanol iii) Ethane (iv) Acetic Anhydride”
12. Convert acetic acid into: i) Methane ii) Acetyl chloride
13. Give any four use of acetic acid.
14. Convert acetic acid into: i) Methane (ii) Acetyl chloride
15. What are essential and non-essential amino acids. Briefly describe the strecker for α-amino acid.
16. Define Zwiitter ion. Discuss effect of acidic and basic medium on the dipoler ion structure of atomic acid.
17. Write a short note on acidic and basic character of amino acids.
18. Give two methods of preparation and two reactions of amino acid.
19. Write any two methods for synthesis of amino acids.

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