Aldehydes, Ketones and Carboxylic Acids

Predict the product (B) in the following sequence of reactions

Ethyl benzene $\stackrel{{\mathrm{KMnO}}_4/ \mathrm{KOH}}{\to }$ A $\stackrel{{\mathrm{H}}_3{\mathrm{O}}^{+}}{\to }$ B

• Benzaldehyde

• Benzoic acid

• Benzophenone

• Acetophenone

Identify the combination of compounds that undergo aldol condensation followed by dehydration to produce but-2-enal

• methanal and ethanal

• two moles of ethanal

• methanal and propanone

• ethanal and propanone

An organic compound with the molecular formula C₈H₈O forms 2,4-DNP derivative, reduces Tollen's reagent and undergoes Cannizzaro reaction. On vigorous oxidation, it gives 1, 2-benzenedicarboxylic acid. The organic compound is

• 2-ethylbenzaldehyde

• 2-methylbenzaldehyde

• acetophenone

• 3-methylbenzaldehyde

Which of the following compound when treated with dibenzyl cadmium yields benzyl methyl ketone?

• Acetone

• Acetaldehyde

• Acetic acid

• Acetyl chloride

One mole of alkene on ozonolysis gives 2 moles of butanone. The alkene is

• 3, 4-dimethylhex-2-ene

• 2, 3-dimethyihex-3-ene

• 3, 4-dimethylhex-3-ene

• 2, 3-dimethylhex-2-ene

The reagent used in Wolff-Kishner reduction is

• NH₂-NH₂ and KOH in ethylene glycol

• Zn-Hg / conc. HCl

• NaBH₄

• Na-Hg/H₂O

Which reagent is used in Etard reaction?

• Chromyl chloride

• Ethanoyl chloride

• SnCl₂ and HCl

• Cadmium chloride

Which of the following carboxylic acids is a tricarboxylic acid?

• Oxalic acid

• Citric acid

• Succinic acid

• Adipic acid

Primary nitroalkanes are obtained in good yield by oxidising aldoximes with the help of

• trifluoroperoxy acetic acid

• acidified potassium permanganate

• concentrated nitric acid

• potassium dichromate and dilute sulphuric acid

Choose the weakest add among the following

• (CH₃)₂CH—COOH

• F₃C—COOH

• F—CH₂—COOH

• CH₃—COOH