Aldehydes, Ketones and Carboxylic Acids PYQs

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:

The correct order of decreasing acidity of the following aliphatic acids is :

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

Carboxylic acids have higher boiling points than aldehydes, ketones and even alcohols of comparable molecular mass. It is due to their

Compound A, C₈H₁₀O, is found to react with NaOI (produced by reacting Y with NaOH) and yields a yellow precipitate with characteristic smell. A and Y are respectively

The IUPAC name of the following compound is ___________:

Of the following, which is the product formed when cyclohexanone undergoes aldol condensation followed by heating?

Consider the following reactions and identify $A$, $X$, $Y$ and $Z$:

The correct order of strengths of the carboxylic acids shown below is:

Reaction of carbonyl compound with one of the following reagents involves nucleophilic addition followed by elimination of water. The reagent is:

Which of the following will not be soluble in sodium hydrogen carbonate?

Which one is most reactive towards nucleophilic addition reaction?

Reaction by which benzaldehyde cannot be prepared is

Consider the reaction: RCHO + NH₂NH₂ → RCH = N – NH₂ What sort of reaction is it?

Which of the following compounds will give yellow precipitate with iodine and alkali?

Consider the following reaction: The product 'A' is:

The order of reactivity of phenyl magnesium bromide (PhMgBr) with the following compounds is:

Following compounds are given: (i) $CH_3CH_2OH$ (ii) $CH_3COCH_3$ (iii) $CH_3CH(OH)CH_3$ (iv) $CH_3OH$ Which of the above compound(s), on being warmed with iodine solution and $NaOH$, will give iodoform?

Propionic acid with $Br_2/P$ yields a dibromo product. Its structure would be:

A strong base can abstract an α-hydrogen from

The relative reactivities of acyl compounds towards nucleophilic substitution are in the order of

Acetophenone when reacted with a base, C₂H₅ONa, yields a stable compound which has the structure?

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:

Nucleophilic addition reaction will be most favoured in:

Self condensation of two moles of ethyl acetate in presence of sodium ethoxide yields:

In a set of reactions, acetic acid yielded a product D. The structure of D would be:

The major organic product formed from the following reaction is: