Free Aldehydes and Ketones MCQs with Answers
679 Aldehydes and Ketones MCQs from Chemistry, each with the correct answer and a written explanation of why it is correct. Free and unlimited, with no account needed.
Aldehydes and ketones contain the polar carbonyl group, but aldehydes are generally more readily oxidised and more reactive than ketones. Coverage includes preparation by oxidation or reduction routes, nucleophilic addition of reagents such as hydrogen cyanide and bisulfite, and tests that distinguish aldehydes from ketones.
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679 questions · page 26 of 34
- A. Ethanoic acid
- B. Ethene
- C. Ethanol
- D. Ethyl ethanoate
Explanation: The compound that matches all of the properties you have listed is ethanoic acid.
Correct answer: Ethanoic acid- A. Ethanol
- B. Ethanal
- C. Ethane
- D. Ethyl acetate
Explanation: The reaction of acetic acid with LiAlH4 gives ethanol. LiAlH4 is a strong reducing agent, and it can reduce carboxylic acids to alcohols.
Correct answer: Ethanol- A. Ketone
- B. Aldehyde
- C. Organic acid
- D. An ester
Explanation: Incomplete/slight oxidation of primary alcohol gives aldehyde, hence option B is the correct option.
Correct answer: Aldehyde- A. HCOOH
- B. CH3-CH2-COOH
- C. CH3COOH
- D. C3H7-COOH
Explanation: In carboxylic acids, solubility decreases down the group, therefore option D is correct as butanoic acid is the largest acid given from…
Correct answer: C3H7-COOH- A. CaCO3
- B. Na-metal
- C. CuO
- D. CH3OH
Explanation: "The explanation for this question will be added soon!".
Correct answer: Na-metal- A. CnH2n+2
- B. CnH2nOH
- C. CnH2n+1COOH
- D. CnH2n
Explanation: The general formula of a monocarboxylic acid is indeed CnH2n+1COOH. For a monocarboxylic acid, the general formula represents the presence…
Correct answer: CnH2n+1COOH- A. HCOOH
- B. CH3COOH
- C. CH3CH2COOH
- D. CICH2COOH
Explanation: Hydrogen bonding occurs when a hydrogen atom is bonded to a highly electronegative atom (such as oxygen or nitrogen) and is attracted to…
Correct answer: HCOOH- A. Ethanol
- B. Caustic soda
- C. Sodium
- D. Sodium hydrogen carbonate
Explanation: With simple sodium metal, ethanoic acid can not react to form water, hence the answer is option is C.
Correct answer: Sodium- A. Propanal
- B. 1-propanol
- C. Propanone
- D. Propanoic acid
Explanation: Oxidation product of 1 -propanol is Propanoic acid
Correct answer: 1-propanol- A. Formic acid + acetic acid
- B. Two moles of methanoic acid
- C. Two moles ethanoic acid
- D. Ethylene glycol
Explanation: C4H8 + 2 KMnO4 + 3 H2O -> 2 CH3COOH + 2 MnO2 + 2 KOH + 2 H2O. From the above reaction, we understand that 2 moles of butene produce 2…
Correct answer: Two moles ethanoic acid- A. Oxalic acid
- B. Picric acid
- C. Malonic acid
- D. Tartaric acid
Explanation: Option A is correct because oxalic acid (C2H2O4) is indeed a dicarboxylic acid.
Correct answer: Oxalic acid- A. Banana
- B. Pineapple
- C. Jasmine
- D. Orange
Explanation: Option A is correct because amyl acetate gives flavour of ripe bananas.
Correct answer: Banana- A. Ethanal
- B. Ethanoic acid
- C. Propanone
- D. Benzoic acid
Explanation: Option B is correct because ethanol produces first ethanal and then ethanoic acid because alcohol first oxidizes to aldehyde and then…
Correct answer: Ethanoic acid- A. Propionic acid
- B. Butyric acid
- C. Pentanoic Acid
- D. Caporic acid
Explanation: Option C is correct because the IUPAC name of velaric is called Pentanoic acid.
Correct answer: Pentanoic Acid- A. CH3COOH
- B. Cl2CHCOOH
- C. HCOOH
- D. CI3CCOOH
Explanation: "The explanation for this question will be added soon!".
Correct answer: CH3COOH- A. Micheal reaction
- B. Cannizzaro reaction
- C. Diel's alder reaction
- D. Perkin reaction
Explanation: The Cannizzaro reaction is a redox reaction in organic chemistry involving the disproportionation of an aldehyde into a carboxylic acid…
Correct answer: Cannizzaro reaction- A. Propionaldehyde
- B. Acetone
- C. Propan-2-ol
- D. Dimethyl ether
Explanation: The correct answer is Dimethyl ether. Ethers do not form precipitates with semicarbazide because this reaction is specific to carbonyl…
Correct answer: Dimethyl ether- A. Butanone
- B. Butanal
- C. 2-Methyl propanal
- D. All of the above
Explanation: Isobutyl alcohol is a primary alcohol, and when it undergoes oxidation, it forms an aldehyde.
Correct answer: 2-Methyl propanal- A. NaHSO3
- B. HCN
- C. NH2NH2
- D. Aldol
Explanation: The goal is to separate ethanol from ethanal. We need a reagent that reacts with one compound but not the other.
Correct answer: NaHSO3- A. Base catalyzed only
- B. Acid catalyzed only
- C. Both acid and base catalyzed
- D. Neither acid nor base catalyzed
Explanation: The correct answer is that the reaction is acid catalyzed only. In this reaction, the presence of an acid catalyst is essential as it…
Correct answer: Acid catalyzed only