Aldehydes, Ketones and Carboxylic Acids PYQs
All NEET previous year questions from Aldehydes, Ketones and Carboxylic Acids — with explanations.
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Compound P(C₈H₈O) gives a red-orange precipitate with 2,4-DNP reagent and does not reduce Fehling's reagent. On drastic oxidation with chromic acid, P gives an aromatic acidic product Q that produces effervescence on treatment with aq. NaHCO₃. Compound P and Q respectively are:
Fehling’s solution ‘A’ is:
Identify product (A) in the following reaction:
Complete the following reaction: [C] is ________.Complete the following reaction: [C] is ________.
Identify the major product obtained in the following reaction:
Match List-I with List-II. Choose the correct answer from the options given below
Given below are two statements: Statement I: The boiling points of aldehydes and ketones are higher than hydrocarbons of comparable molecular masses because of weak molecular association due to dipole-dipole interactions. Statement II: The boiling points of aldehydes and ketones are lower than alcohols of similar molecular masses due to the absence of H-bonding. Choose the most appropriate answer.
Which one of the following is not formed when acetone reacts with 2-pentanone in the presence of dilute NaOH followed by heating?
The product formed in the following reaction using NaBH4/C2H5OH is:
Match List-I with List-II and choose the correct answer.
Reaction between benzaldehyde and acetophenone in presence of dilute NaOH is known as
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Which one is most reactive towards nucleophilic addition reaction?
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Reaction by which benzaldehyde cannot be prepared is
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Consider the reaction: RCHO + NH₂NH₂ → RCH = N – NH₂ What sort of reaction is it?
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Which of the following compounds will give yellow precipitate with iodine and alkali?
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Consider the following reaction: The product 'A' is:
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A strong base can abstract an α-hydrogen from
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The relative reactivities of acyl compounds towards nucleophilic substitution are in the order of
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Acetophenone when reacted with a base, C₂H₅ONa, yields a stable compound which has the structure?
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A carbonyl compound reacts with hydrogen cyanide to form cyanohydrin which on hydrolysis forms a racemic mixture of α-hydroxy acid. The carbonyl compound is:
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Nucleophilic addition reaction will be most favoured in:
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Self condensation of two moles of ethyl acetate in presence of sodium ethoxide yields:
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The major organic product formed from the following reaction is:
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