Chapter 28

Aldehydes and ketones are distinguished by using (a) Tollen's reagent (b) Lucas reagent (c) Borshe reagent (d) all of these

Carbonyl compounds undergo nucleophillic addition because of (a) more stable anion with negative charge on oxygen and less stable carbocation (b) electromeric effect (c) electronegativity difference of carbon and oxygen atoms (d) none of these

Clemmensen reduction is carried with (a) \(\mathrm{LiAlH}_{4}\) in ether (b) \(\mathrm{Zn}-\mathrm{Hg}\) and \(\mathrm{HCl}\) (c) \(\mathrm{H}_{2}\) in the presence of \(\mathrm{Pd}\) (d) \(\mathrm{NH}_{2} \mathrm{NH}_{2} / \mathrm{glycol}\) and \(\mathrm{KOH}\)

The addition of HCN to carbonyl compounds is an example of (a) electrophillic addition (b) nucleophillic addition (c) nucleophillic substitution (d) electrophilic substitution

Cyanohydrin of which of the following will yield lactic acid? (a) \(\mathrm{HCHO}\) (b) \(\mathrm{CH}_{3} \mathrm{COCH}_{3}\) (c) \(\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{CHO}\) (d) \(\mathrm{CH}_{3} \mathrm{CHO}\)

If formaldehyde and \(\mathrm{KOH}\) are heated, then we get (a) methyl alcohol (b) acetylene (c) methane (d) ethyl formate

Which of the following will not give iodoform test? (a) ethanol (b) ethanal (c) pentan-3-one (d) pentan-2-one

Oxidation of toluene to benzaldehyde by the use of chromyl chloride is called (a) Wurtz reaction (b) Fittig reaction (c) Etard's reaction (d) Rosenmund's reaction

In a reaction involving ring substitution of \(\mathrm{C}_{6} \mathrm{H}_{5} \mathrm{Y}\), the major product is meta isomer. The group Y can be (a) \(-\mathrm{NH}_{2}\) (b) \(-\mathrm{Cl}\) (c) \(-\mathrm{CH}_{3}\) (d) \(-\mathrm{COOH}\)

Which aldehyde will give Cannizzaro's reaction? (a) \(\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{CH}_{2} \mathrm{CHO}\) (b) \(\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{CHCHO}\) (c) \(\left(\mathrm{CH}_{3}\right)_{3} \mathrm{CCHO}\) (d) \(\left(\mathrm{CH}_{3}\right)_{2} \mathrm{CHCH}_{2} \mathrm{CHO}\)