Chemical Reactions

The reaction of benzaldehyde with aniline produces benzalaniline which is a condensation reaction.

Answer (d) Benzamide

lodoform test is given by those compound

which has or

- s. Hence, this test is not

given by phenol

Methanol reacts with salicylic acid in the presence of a few drops of conc to give methyl salicylate having the smell of oil of winter green.

Aliphatic as well as aromatic amines when treated with chloroform in an alkaline medium, give a very offensive compound, called carbylamine. Hence, the reaction is known as carbylamine reaction.

Conversion of benzene into -bromoaniline can be done by successive nitration, bromination and reduction using following reagent

Nitration conc. conc.

Bromination

Reduction

Formation of nitrobenzene in the first step direct incoming electrophile towards meta position on the further step reduction of nitro compound produces m- bromoaniline very easily. Complete sequence of the chemical reaction can be shown as

The compound (where aryl, alkyl, or their derivatives on reaction with sodium methoxide (NaOMe) produces OMe and NaCl in accordance with following chemical equation

The above reaction is a type of nucleophilic substitution reaction in which nucleophile [here OMe] replaces halogen atom of . Reactivity of such organic halides in nucleophilic substitution reaction depends upon polarity of bond. Higher the polarity of bond easier will be the nucleophilic substitution reaction, hence, faster will be the reaction here bond in aryl halide has partially double bond character due to conjugation of lone pair of Cl with electrons of benzene ring as shown below

Due to partial double bond character breaking of bond aryl halide become impossible. Among the given four substrates the compound having most polar bond will undergo faster nucleophilic substitution reaction. Greater the number of electron withdrawing group higher will be polarity of bond.

undefined

Number of withdrawing groups (a) has two electron withdrawing groups hence, (a) has most polar C - Cl bond and (a) will undergo fastest reaction chemical reaction occurring in the above reaction is as follows

Methanoic acid is unique amongst simple carboxylic acids, since it contains a hydrogen atom instead of an alkyl group (HCOOH). i.e. it contains both an aldeny die group and a carboxyl group.



So, like aldehyde, methanoic acid reduces Tollen's reagent to shining silver mirror but ethanoic acid does not give this test