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 Multiple Choice QuestionsMultiple Choice Questions


When AgCl is treated with KCN

  • Ag is precipitated

  • a complex ion is formed

  • double decomposition takes place

  • no reaction takes place



Which one of the following compounds is most reactive towards nucleophilic addition?

  • CH3CHO

  • PhCOCH3

  • PhCOPh

  • CH3COCH3



Carbonyl compounds undergoes nucleophilic addition reaction.

[X- shows negative inductive effect]

If group or atom attached with carbonyl carbon shows negative inductive effect, then it decreases electron density on carbonyl carbon and facilitate the attack of nucleophiles, hence reactivity of carbonyl compound increases.

[Y- shows negative inductive effect]

If group or atom attached with carbonyl carbon shows positive inductive effect, then it increases electron density on carbonyl carbon and supress the attack of nucleophiles, hence, reactivity of carbonyl compound decreases.

The aromatic aldehydes and ketones are less reactive than their aliphatic analogues. This is due to the +R effect of benzene ring.

On the basis of above informations, the increasing order of the nucleophilic addition reaction in the following compound will be CH3CHO > CH3COCH3 > PhCOCH3 > PhCOPh


Which reaction is used for the preparation of acetophenone ?

  • Reimer-Tiemann reaction

  • Wurtz-Fittig reaction

  • Friedel-Craft's reaction

  • Cannizaro's reaction


Iodoform test is not given by :

  • HCHO

  • CH3CHO

  • CH3COCH3

  • C2H5OH


Pure methane can be produced by

  • Wurtz reaction

  • Kolbe's electrolytic method

  • soda lime decarboxylation

  • reduction with H2