Aldehydes, Ketones and Carboxylic Acids

Compound P(C8H8O) gives a red orange precipitate with 2,4-DNP reagent and it does not reduce Fehling's reagent. On drastic oxidation with chromic acid, P gives an aromatic product Q that produces effervescence on treating with aq. NaHCO3. Compounds P and Q, respectively, are :

1. P = [figure] ; Q = [figure]
2. P = [figure] ; Q = [figure]
3. P = [figure] ; Q = [figure]
4. P = [figure] ; Q = [figure]

Consider the following reaction, and choose the correct option. [figure]

1. Compound P is obtained by the hydrogenation of benzoyl chloride with Pd on BaSO4
2. On treating compound P with saturated NaHCO3 solution, brisk effervescence is observed
3. Compound P can be prepared by treating benzene with anhydrous AlCl3 and CH3COCl
4. On treating with bromine water, compound P gives a white precipitate

The compound that CANNOT be obtained from the aldol condensation reaction shown below, is [figure]

1. [figure]
2. [figure]
3. [figure]
4. [figure]

For the following reaction sequence, choose the correct option [figure]

1. Both P and Q are carbonyl compounds
2. If P is the sodium salt of a carboxylic acid, Q is a primary alcohol
3. P and Q are aromatic compounds
4. If P gives a carboxylic acid on acidification, Q gives a poisonous gas on exposure to air and light

Identify the suitable reagent for the following conversion. [figure]

1. (i) NaBH4, (ii) H+/H2O
2. H2/Pd-BaSO4
3. (i) LiAlH4, (ii) H+/H2O
4. (i) AlH(iBu)2, (ii) H2O

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

1. HCOOH > CH3COOH > (CH3)2CHCOOH > (CH3)3CCOOH
2. HCOOH > (CH3)3CCOOH > (CH3)2CHCOOH > CH3COOH
3. (CH3)3CCOOH > (CH3)2CHCOOH > CH3COOH > HCOOH
4. CH3COOH > (CH3)2CHCOOH > (CH3)3CCOOH > HCOOH

The major product of the following reaction is [figure]

1. [figure]
2. [figure]
3. [figure]
4. [figure]

Identify the correct reagents that would bring about the following transformation. [figure]

1. (i) H2O/H+, (ii) CrO3
2. (i) BH3, (ii) H2O2/OH , (iii) PCC
3. (i) BH3, (ii) H2O2/OH , (iii) alk. KMnO4
4. (i) H2O/H+, (ii) PCC

Fehling's solution 'A' is

1. aqueous copper sulphate
2. alkaline copper sulphate
3. alkaline solution of sodium potassium tartrate (Rochelle's salt)
4. aqueous sodium citrate

Select the incorrect reaction among the following :

1. CH3COCl [ ]H2O CH3COOH
2. [figure]
3. CH3CH2OH [(ii) H3O ](i) KMnO4/OH- CH3COOH
4. CH3CH2CH2OH CrO3-H2SO4 CH3CH2COOH

Identify product (A) in the following reaction : [figure]

1. [figure]
2. [figure]
3. [figure]
4. [figure]

Complete the following reaction: [figure] [C] is .

1. [figure]
2. [figure]
3. [figure]
4. [figure]

Identify the major product obtained in the following reaction: [figure]

1. [figure]
2. [figure]
3. [figure]
4. [figure]

Given below are two statements : In the light of the above statements, choose the most appropriate answer from the options given below

1. Both Statement I and Statement II are correct
2. Both Statement I and Statement II are incorrect
3. Statement I is correct but Statement II is incorrect
4. Statement I is incorrect but Statement II is correct

RMgX + CO2 [ether]dry Y H3O+ RCOOH What is Y in the above reaction?

1. RCOO-Mg+X
2. R3CO-Mg+X
3. RCOO-X+
4. (RCOO)2Mg

Which one of the following is not formed when acetone reacts with 2-pentanone in the presence of dilute NaOH followed by heating?

1. [figure]
2. [figure]
3. [figure]
4. [figure]

Which of the following reactions is not an example for nucleophilic addition-elimination reaction?

1. CH3CHO + NH3 CH3CH=NH + H2O
2. CH3CHO + NaHSO3 CH3- H | OH |C-SO3Na
3. CH3CHO + NH2OH CH3CH=N-OH + H2O
4. CH3CHO + C6H5NHNH2 CH3CH=N-NHC6H5 + H2O

The product formed from the following reaction sequence is [figure]

1. [figure]
2. [figure]
3. [figure]
4. [figure]

The products A and B in the following reaction sequence are : [figure]

1. [figure]
2. [figure]
3. [figure]
4. [figure]

The incorrect method to synthesize benzaldehyde is

1. [figure] , CH3MgBr, followed by H3O+
2. [figure] , H2, Pd-BaSO4
3. [figure] , DIBAL-H, followed by H2O
4. [figure] , CrO2Cl2 in CS2, followed by H3O+

The intermediate compound 'X' in the following chemical reaction is : [figure]

1. [figure]
2. [figure]
3. [figure]
4. [figure]

The product formed in the following chemical reaction is : [figure]

1. [figure]
2. [figure]
3. [figure]
4. [figure]

Identify compound X in the following sequence of reactions : [figure]

1. [figure]
2. [figure]
3. [figure]
4. [figure]

Reaction between benzaldehyde and acetophenone in presence of dilute NaOH is known as :

1. Cannizzaro's reaction
2. Cross Cannizzaro's reaction
3. Cross Aldol condensation
4. Aldol condensation

The major product of the following reaction is : [figure]

1. [figure]
2. [figure]
3. [figure]
4. [figure]

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

1. [figure] and I2
2. [figure] and I2
3. [figure] and I2
4. [figure] and I2

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

1. formation of intramolecular H-bonding
2. formation of carboxylate ion
3. more extensive association of carboxylic acid via van der Waals' forces of attraction
4. formation of intermolecular H-bonding

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

1. [figure]
2. [figure]
3. [figure]
4. [figure]

Consider the reactions, [figure] Identify A, X, Y and Z.

1. A-Methoxymethane, X-Ethanol, Y-Ethanoic acid, Z-Semicarbazide.
2. A-Ethanal, X-Ethanol, Y-But-2-enal, Z-Semicarbazone.
3. A-Ethanol, X-Acetaldehyde, Y-Butanone, Z-Hydrazone.
4. A-Methoxymethane, X-Ethanoic acid, Y-Acetate ion, Z-Hydrazine.

Which of the following reagents would distinguish cis-cyclopentane-1,2-diol from the trans-isomer?

1. MnO2
2. Aluminium isopropoxide
3. Acetone
4. Ozone