Aldehyde ketones & carboxylic Acid MCQs for NEET — Chemistry Questions with Answers

Carbonyl compounds can generally be converted to hydrocarbons by :

Which statement about the aldol condensation is correct ?

A compound gives a positive test with I₂/NaOH and is extracted from benzene by saturated NaHSO₃, It may be :

In which of the following compounds the methylenic hydrogens are the most acidic ?

The presence of unsaturation in organic compounds can be tested with :

$\mathrm{Ph}-{\mathrm{CH}}_3\stackrel{{\mathrm{CrO}}_2{\mathrm{Cl}}_2}{\to }\left(\mathrm{A}\right)\stackrel{\mathrm{conc}.\mathrm{KOH}}{\to }\mathrm{Ph}-{\mathrm{CH}}_2\mathrm{OH} + \left(\mathrm{B}\right)$

Product (B) of above the raction is :

${\mathrm{CH}}_3-\stackrel{\stackrel{\mathrm{O}}{\parallel }}{\mathrm{C}}-\mathrm{H}\stackrel{\mathrm{HCN}}{\to }\left(\mathrm{A}\right)\stackrel{{\mathrm{H}}_3{\mathrm{O}}^{\oplus }}{\to }\left(\mathrm{B}\right)\underset{△}{\to }\left(\mathrm{C}\right)\stackrel{{\mathrm{LiAlH}}_4}{\to }\left(\mathrm{D}\right)\stackrel{{\mathrm{HIO}}_4}{\to }\mathrm{HCHO} + \left(\mathrm{E}\right)$

Compound (C) can show geometrical isomerism, Product (E) of the reaction will be :

Arrange in their increasing order of equilibrium constants for hydraion ?

$\mathrm{Ph}-{\mathrm{CH}}_2-\mathrm{CN}\underset{\underset{\left(3\right) {\mathrm{H}}_3{\mathrm{O}}^{\oplus }/∆}{\left(2\right){\mathrm{CH}}_3-\stackrel{\stackrel{\mathrm{O}}{\parallel }}{\mathrm{C}}-\mathrm{Cl}}}{\overset{\left(1\right)\mathrm{EtONA}}{\to }}$ (P); Product (p) of the reaction will be :

$\underset{\mathrm{Symmetrical} \mathrm{ketone}}{\left(\mathrm{A}\right)} \stackrel{{\mathrm{LiAlH}}_4}{\to }\left(\mathrm{B}\right)\underset{∆}{\overset{{\mathrm{H}}^{\oplus }}{\to }}$Diastereomers Reactent (A) is :