Chapter 24

The correct order of increasing basicity of the given conjugate bases \(\left(\mathrm{R}=\mathrm{CH}_{3}\right)\) is |2010] (a) \(\mathrm{RCO} \overline{\mathrm{O}}<\mathrm{HC} \equiv \overline{\mathrm{C}}<\overline{\mathrm{R}}<\overline{\mathrm{N}} \mathrm{H}_{2}\) (b) \(\overline{\mathrm{R}}<\mathrm{HC}=\overline{\mathrm{C}}<\mathrm{RCO} \overline{\mathrm{O}}<\overline{\mathrm{N}} \mathrm{H}_{2}\) (c) \(\mathrm{RCO} \overline{\mathrm{O}}<\overline{\mathrm{N} H}_{2}<\mathrm{HC} \equiv \overline{\mathrm{C}}<\overline{\mathrm{R}}\) (d) \(\mathrm{RCO} \overline{\mathrm{O}}<\mathrm{HC} \equiv \overline{\mathrm{C}}<\overline{\mathrm{N}} \mathrm{H}_{2}<\overline{\mathrm{R}}\)

The strongest acid amongst the following compounds is: (a) \(\mathrm{HCOOH}\) (b) \(\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{CH}(\mathrm{Cl}) \mathrm{CO}_{2} \mathrm{H}\) (c) \(\mathrm{ClCH}_{2} \mathrm{CH}_{2} \mathrm{CH}_{2} \mathrm{COOH}\) (d) \(\mathrm{CH}_{3} \mathrm{COOH}\)

Arrange the following compound in order of decreasing acidity: \(|2013|\) Oc1ccc(Cl)cc1 Cc1ccc(O)cc1 O=[N+]([O-])c1ccc(O)cc1 COc1ccc(O)cc1 (I) (II) (III) (IV) (a) \(\mathrm{III}>\mathrm{I}>\mathrm{II}>\mathrm{IV}\) (b) IV \(>\mathrm{III}>\mathrm{I}>\mathrm{II}\) (c) \(\mathrm{II}>\mathrm{IV} \geq \mathrm{I}>\mathrm{III}\) (d) \(\mathrm{I}>\mathrm{II}>\mathrm{III}>\mathrm{IV}\)

A solution of \((-)-1\)-chloro-1-phenylethane in toluene racemizes slowly in the presence of a small amount of \(\mathrm{SbCl}_{5}\) due to formation of: \(|\mathbf{2 0 1 3}|\) (a) carbocation (b) free radical (c) carbanion (d) carbene

Considering the basic strength of amines in aqueous solution, which one has the smallest \(\mathrm{pK}_{b}\) value? [2014] (a) \(\left(\mathrm{CH}_{3}\right)_{3} \mathrm{~N}\) (b) \(\mathrm{C}_{6} \mathrm{H}_{3} \mathrm{NH}_{2}\) (c) \(\left(\mathrm{CH}_{3}\right)_{2} \mathrm{NH}\) (d) \(\mathrm{CH}_{3} \mathrm{NH}_{2}\)

The reaction of Propene with \(\mathrm{HOCl}\left(\mathrm{Cl}_{2}+\mathrm{H}_{2} \mathrm{O}\right)\) proceeds through the intermediate (a) \(\mathrm{CH}_{3}-\mathrm{CH}(\mathrm{OH})-\mathrm{CH}_{2}\) (b) \(\mathrm{CH}_{3}-\mathrm{CH}-\mathrm{CH}_{2} \mathrm{Cl}\) (c) \(\mathrm{CH}_{3}-\mathrm{CHCl}-\mathrm{CH}_{2}\) (d) \(\mathrm{CH}_{3}-\mathrm{CH}-\mathrm{CH}_{2} \mathrm{OH}\)