Organic Chemistry Questions and Answers – Physical Properties of Carboxylic Acids | Organic Chemistry Multiple Choice Questions and Answers

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Questions
1 Which of the following acids has the smallest dissociation constant?
A CH3CHFCOOH
B FCH2CH2COOH
C BrCH2CH2COOH
D CH3CHBrCOOH

Answer:BrCH2CH2COOH
2 The vapour of a carboxylic acid HA when passed over MnO2 at 573 K yields propanone. What is the acid HA?
A Methanoic acid
B Ethanoic acid
C Propanoic acid
D Butanoic acid

Answer: Ethanoic acid
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3 Which acid is strongest or Which is most acidic?
A Cl2CH.COOH
B ClCH2COOH
C CH3COOH
D Cl3C.COOH

Answer: ClCH2COOH
4 The acid which reduces Fehling solution is which of the following?
A Methanoic acid
B Ethanoic acid
C Butanoic acid
D Propanoic acid

Answer: Methanoic acid
5 Which class of compounds shows H-bonding even more than in alcohols?
A Phenols
B Carboxylic acids
C Ethers
D Aldehydes

Answer: Carboxylic acids
6 Which of the following is the strongest acid?
A CH3COOH
B BrCH2COOH
C ClCH2COOH
D FCH2COOH

Answer:FCH2COOH
7 The reaction of HCOOH with conc.H2SO4 gives which of the following compound?
A CO2
B CO
C Oxalic acid
D Acetic acid

Answer: CO
8 Which one is strongest acid among following options?
A CH2FCOOH
B CH2ClCOOH
C CHCl2COOH
D CHF2COOH

Answer: CH2ClCOOH
9 Acetic acid is weak acid than sulphuric acid because which of the following reasons?
A It decomposes on increasing temperature
B It has less degree of ionisation
C It has -COOH group
D It has more inductive effect

Answer: It has less degree of ionisation
10 In CH3COOH and HCOOH, HCOOH will be which of the following?
A Less acidic
B Equally acidic
C More acidic
D cannot say about acidic behaviour

Answer: More acidic
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