Chemistry Chapter 18 Entry Test MCQs
Topic 18
Carboxylic Acids
1. Monocarboxylic acids show functional group isomerism with
a. Ethers
b. Esters
c. Aldehydes
d. Alcohols
2. Which of the following will fail to react with potassium dichromate and dilute sulphuric acid
a. 2-Propanol
b. Ethyl alcohol
c. Acetone
d. Acetaldehyde
3. Fats and oils are mixture of
a. Only saturated and unsaturated fatty acids
b. Glycerides and saturated fatty acids
c. Glycerides and unsaturated fatty acids
d. Glycerides of saturated and unsaturated fatty acids
4. Which of the following is not a fatty acid
a. Oleic acid
b. Stearic acid
c. Phenyl acetic acid
d. Palmitic acid
5. Number of oxygen atoms in a acetamide molecule is
a. 3
b. 1
c. 4
d. 2
6. Vinegar obtained from sugarcane has
a. C6H5COOH
b. CH3COOH
c. CH3CH2COOH
d. HCOOH
7. Acetic acid is manufactured by the fermentation of
a. Ethanal
b. Ethanol
c. Methanal
d. Methanol
8. Ammonium acetate reacts with acetic acid at 110°C to form
a. Ammonium cyanate
b. Acetamide
c. Urea
d. Formamide
9. Which class of compounds shows H-bonding even more than in alcohols
a. Ethers
b. Phenols
c. Aldehydes
d. Carboxylic acids
10. Of the following four reactions, formic and acetic acids differ in which respect
a. Formation of ester with alcohol
b. Replacement of hydrogen by sodium
c. Blue litmus reaction
d. Reduction of Fehling solution
11. Formaldehyde and formic acid can be distinguished using
a. Ferric chloride
b. Tollen’s reagent
c. Sodium bicarbonate
d. Fehling solution
12. When acetic acid is dissolved in benzene its molecular mass
a. Either increases or decreases
b. Decreases
c. Suffers no change
d. Increases
13. Benzoic acid has higher molecular weight in benzene and less in water because
a. It associates in water and dissociates in benzene
b. Water has lower freezing point and higher boiling point than benzene
c. It dissociates in water and associates in benzene
d. It dissociates to a greater extent in benzene than in water
14. Which one of the following orders of acid strength is correct?
a. RCOOH ˃ ROH ˃ HOH ˃ HC ≡ CH
b. RCOOH ˃ HC≡CH ˃ HOH ˃ ROH
c. RCOOH ˃ HOH ˃ HC ≡ CH ˃ ROH
d. RCOOH ˃ HOH ˃ ROH ˃ HC ≡ CH
15. Lower carboxylic acids are soluble in water due to
a. Dissociation into ions
b. Low molecular weight
c. Easy hydrolysis
d. Hydrogen bonding
16. What happens when 2-hydroxy benzoic acid is distilled with zinc dust, it gives
a. Benzaldehyde
b. Phenol
c. polymeric compound
d. Benzoic acid
17. The common name of propane 1,3-dioic is
a. Malonic acid
b. Oxalic acid
c. Fumaric acid
d. Aromatic acid
18. The common thing in phthalic acid and oxalic acid is that both are
a. Hydrocarbons
b. Aromatic
c. Strong acids
d. Dicarboxylic
19. Which of the following is most acidic in nature:
a. Acetic acid
b. Fluoroacetic acid
c. Aminoacetic acid
d. Nitroacetic acid
20. Which one of the following acids is present in lemon juice?
a. Tartaric acid
b. Citric acid
c. Oxalic acid
d. Benzoic acid
21. Carboxylic acid reacts with ammonia to form ammonium salts which on heating produces
a. Ester
b. CO2
c. Acidamide
d. Alkane
22. The aliphatic monocarboxylic acids are obtained by the hydrolysis of
a. fats and oils
b. proteins and oil
c. fats and proteins
d. All of these
23. What is the main reason for the fact that carboxylic acids can undergo ionization?
a. Hydrogen bonding
b. Resonance stabilization of the carboxylate ion
c. High reactivity of alpha hydrogen
d. Absence of alpha hydrogen
24. R – CH2 – CH2OH can be converted into RCH2CH2COOH. The correct sequence of reagent is
a. KCN, H+
b. PBr3, KCN, H+
c. PBr3, KCN, H2
d. HCN, PBr3, H+
25. Which of the following orders of relative strengths of acids is correct?
a. CICH2COOH > BrCH2COOH > FCH2COOH
b. CICH2COOH > FCH2COOH > BrCH2COOH
c. FCH2COOH > CICH2COOH > BrCH2COOH
d. BrCH2COOH > CICH2COOH > FCH2COOH