Organic Acids – Old Year Questions

1. Assertion (A): Formic Acid is a stronger acid than Acetic acid.
Reason (R): Formic Acid is an organic acid.
Code :

(a) Both (A) and (R) are true and (R) is the correct explanation of (A).
(b) Both (A) and (R) are true but (R) is not the correct explanation of (A).
(c) (A) is true but (R) is false.
(d) (A) is false but (R) is true.

[I.A.S. (Pre) 1998]

 

2. The sensation of fatigue in the muscles after prolonged strenuous physical work is caused by–

(a) A decrease in the supply of oxygen
(b) Minor wear and tear of muscle fibres
(c) The depletion of glucose
(d) The accumulation of lactic acid

[I.A.S. (Pre) 2000]

 

3. Accumulation of which one of the following in the muscles leads to fatigue?

(a) Lactic acid
(b) Benzoic acid
(c) Pyruvic acid
(d) Uric acid

[U.P. P.C.S. (Pre) 2010, U.P. Lower Sub. (Spl.) (Pre) 2008, U.P.P.C.S. (Pre) 1992]

 

4. Which acid accumulates in the muscles to cause fatigue?

(a) Lactic acid
(b) Pyruvic acid
(c) Citric acid
(d) Uric acid
(e) Acetic acid

[Chhattisgarh P.C.S (Pre) 2013]

 

5. Lemon is citrus due to –

(a) Hydrochloric acid
(b) Acetic acid
(c) Tartaric acid
(d) Citric acid

[39th B.P.S.C. (Pre) 1994]

 

6. Which acid is mainly found in lemons?

(a) Acetic acid
(b) Ascorbic acid
(c) Citric acid
(d) Nitric acid

[M.P.P.C.S. (Pre) 2003]

 

7. Match List-I and List-II and select the correct answer from the code given below :
List-I List-II
(Acid) (Source)
A. Lactic acid 1. Lemon
B. Acetic acid 2. Rancid butter
C. Citric acid 3. Milk
D. Butyric acid 4. Vinegar
Code :
A B C D

(a) 1 4 3 2
(b) 3 1 4 2
(c) 2 3 4 1
(d) 3 4 1 2

[U.P.P.C.S. (Pre) 1997]

 

8. Match List-I with List-II and select the correct answer from the code given below the lists :
List-I List-II
A. Acetic Acid 1. Butter
B. Lactic acid 2. Lemon
C. Butyric acid 3. Vinegar
D. Citric acid 4. Milk
Code :
A B C D

(a) 3 4 2 1
(b) 3 4 1 2
(c) 4 3 1 2
(d) 1 2 3 4

[U.P. Lower Sub. (Mains) 2013]

 

9. Which one of the following pairs is not correctly matched?

(a) Lactose – Sour milk
(b) Carbonic acid – Soda water
(c) Formic acid – Red ants
(d) Tartaric acid – Grape juice

[U.P. Lower Sub. (Pre) 2015]

 

10. Which one of the following pairs is not correctly matched?

(a) Ascorbic acid – Lemon
(b) Maltose – Malt
(c) Acetic acid – Curd
(d) Formic acid – Red Ant

[U.P.P.C.S. (Mains) 2015]

 

11. Match List-I with List-II and select the correct answer by using the codes given below the lists :

List-I  List-II
A. Pickle 1. Carbonic Acid
B. Sour Milk 2. Acetic Acid
C. Apple 3. Lactic Acid
D. Cold drinks and soda water  4. Malic Acid

Code :
A B C D

(a) 1 2 3 4
(b) 2 3 4 1
(c) 4 3 1 2
(d) 3 4 2 1

[U.P.P.C.S. (Mains) 2003]

 


12. Which of the following is NOT correctly matched?

(a) Acid present in vinegar – Acetic acid
(b) Compound present in bones – Calcium phosphate
(c) Souring of milk – Nitric acid
(d) Acid present in gastric juice – Hydrochloric acid

[U.P. P.C.S. (Pre) 2021]

 

13. Milk openly placed for some becomes sour due to

(a) Carbonic acid
(b) Lactic acid
(c) Citric acid
(d) Acetic acid

[U.P. Lower Sub. (Pre) 2004]

 

14. Which one of the following acids is present in sour milk products?

(a) Acetic Acid
(b) Butyric Acid
(c) Tartaric Acid
(d) Lactic Acid

[U.P.P.C.S. (Mains) 2012]

 

15. Which one of the following acids, is formed during the change of milk into curd?

(a) Acetic acid
(b) Ascorbic acid
(c) Citric acid
(d) Lactic acid

[R.A.S./R.T.S.(Pre) 2008]

 

16. Curd making is an ancient “Biotechnological” process involving :

(a) Bacteria
(b) Virus
(c) Fungus
(d) Protozoa

[R.A.S./R.T.S.(Pre) 2010]

 

17. The predominant organic acid in grapes is –

(a) Acetic acid
(b) Citric acid
(c) Malic acid
(d) Tartaric acid

[U.P.P.C.S. (Spl.) (Mains) 2008]

 

18. For human nutrition, tomatoes are a rich source of

(a) Acetic acid
(b) Methonic acid
(c) Citric acid
(d) Oxalic acid

[R.A.S./R.T.S. (Re. Exam) (Pre) 2013]

 

19. Which one of the following organic acids is abundant in grapes, tamarind, and bananas?

(a) Acetic acid
(b) Citric acid
(c) Lactic acid
(d) Tartaric acid

[U.P.P.C.S. (Pre) 2017]

 

20. Which acid is used in photography–

(a) Formic acid
(b) Oxalic acid
(c) Citric acid
(d) Acetic acid

[U.P.U.D.A./L.D.A. (Pre) 2003]

 

21. Which one of the following acids is used in the manufacturing of baking powder?

(a) Oxalic Acid
(b) Lactic Acid
(c) Tartaric Acid
(d) Benzoic Acid

[U.P.P.C.S. (Mains) 2012]

 

22. Vinegar is the solution of which of the following?

(a) Oxalic acid
(b) Citric acid
(c) Hydrochloric acid
(d) Acetic acid

[U.P.P.C.S. (Pre) 2009, 42nd B.P.S.C. (Pre) 1997, I.A.S. (Pre) 1993]

 

23. Which acid is found in Vinegar?

(a) Lactic Acid
(b) Citric Acid
(c) Malic Acid
(d) Acetic Acid

[M.P.P.C.S. (Pre) 2010]

 

24. Vinegar is chemically known as :

(a) Acetic acid
(b) Butyric acid
(c) Formic acid
(d) Tartaric acid

[M.P. P.C.S. (Pre) 2016]

 

25. The chemical name for vinegar is :

(a) Methanol
(b) Ethanol
(c) Acetic acid
(d) Ethyl acetate
(e) None of the above/More than one of the above

[63rd B.P.S.C. (Pre) 2017]

 

26. Which of the following statements is correct?
A. Sugarcane juice is fermented to form vinegar.
B. Vinegar has acetic acid.
C. Benzoic acid is the acid present in Vinegar.
D. Vinegar is used as a preservative.
Code :

(a) A, B, D
(b) B, C, D

(c) A, C, D
(d) A, B, C

[R.A.S./R.T.S. (Pre) 2016]

 

27. Which of the following is not optically active?

(a) Glycine
(b) Alanine
(c) Serine
(d) All of the above

[Jharkhand P.C.S. (Pre) 2013]