Chapter 16

When aniline reacts with oil of bitter almonds \(\left(\mathrm{C}_{6} \mathrm{H}_{3} \mathrm{CHO}\right)\) condensation takes place and benzal derivative is formed? This is known as: \(\quad\) |CBSE 1995] (a) Millon base (b) Schiff's reagent (c) Schiff's base (d) Benedict's reagent

The axidation of toluene with \(\mathrm{CrO}_{3}\), in the presence of \(\left(\mathrm{CH}_{3} \mathrm{CO}\right)_{2} \mathrm{O}\) gives a product \(A\), which on treatment with aqueous \(\mathrm{NaOH}\), produces: |CBSE 1995] (a) \(\mathrm{C}_{5} \mathrm{H}_{5} \mathrm{CHO}\) (b) \(\mathrm{C}_{6} \mathrm{H}_{3} \mathrm{COONa}\) (c) 2,4 -diacetyl toluene (d) \(\left(\mathrm{C}_{6} \mathrm{H}_{3} \mathrm{CO}\right)_{2} \mathrm{O}\)

Which of the following compounds give benzoic acid on oxidation? [CHSF: 1996| (a) chlorophenol (b) chlorotoluene (c) chlorobensene (d) benzyl chloride

In case of chlorination of benzene in the presence of \(\mathrm{FeCl}_{3}\) the electrophile is: 1CHSE 1996] (a) \(\mathrm{Cl}^{+}\) (b) \(\mathrm{Cl}^{-}\) (c) \(\mathrm{Cl}\) (d) \(\mathrm{FeCl}_{3}\)

The oxidation of toluene to benzaldehyde by chromyl chloride is called: |CBSE 1996 | (a) Cannizzaro"s reaction (b) Wurtz reaction (c) Etard's reaction (d) Reimer-Tiemann reaction

Among the following compounds (I-III) the correct order of reaction with electrophile is: |CBSE 1997] COc1ccccc1 c1ccccc1 O=[N+]([O-])c1ccccc1 II 111 (a) \(11>11 I>I\) (b) III < \(I<11\) (c) \(1>11>111\) (d) \(\mathrm{I}=\| \geq \mathbb{I I}\)

1-Phenyl ethanol can be prepared by the reaction of benzaldehyde with: \(\quad\) |CBSE 1997| (a) methyl bromide (b) ethyl iodide and magnesium (c) methyl iodide and magnesium (d) methyl bromide and aluminium bromide

Replacement of \(\mathrm{Cl}\) of chlorobenzene to give phenol requires drastic conditions but chlorine of 2,4 -dinitrochlorobenzene is readily replaced. This is because: |CESE 1997| (a) NO, makes the ring electron rich at ortho and para positions (b) NO, withdraw electrons from meta position (c) NO, donates electron at meta position (d) \(\mathrm{NO}_{2}\), withdraws electrons from ortho/para positions.

Aniline is reacted with bromine water and the resulting product is treated with an aqueous solution of sodium nitrite in presence of dilute hydrochloric acid. The compound so formed is converted to a tetrafluoroborate which is subsequently heated. The final product is: 1 CBSE 1998] (a) \(1,3,5\)-tribromobenzene (b) \(p\)-bromofluorobenzene (c) \(p\)-bromoaniline (d) \(2,4,6\)-tribromofluorobengene

Aspirin is an acetylation product of: [CBSE 1998] (a) \(o\)-hydroxybenzoic acid (b) o-hydroxybenzene (c) m-hydroxybenzoic acid (d) \(p\)-dihydroxybenzene

Gammexane is: |CBSE \(1999 \mid\) (a) chlorobenzene (b) benzylchloride (c) bromobenzene (d) benzenehexachloride

Phenyl isocyanides are prepared by which of the following reaction? [CHSE 1999\(]\) (a) Rosenmund's reaction (b) Carbylamine reaction (c) Reimer-Tiemann reaction (d) Wurtz reaction

The ionization constant of phenol is higher than that of ethanol because: \(\quad\) [CBSE 2000] (a) phenoxide ion is bulkier than ethoxide (b) phenoxide ion is stronger base than ethoxide (c) phenoxide ion is stabilised through delocalization (d) phenoxide ion is less stable than ethoxide

Benzoic acid may be converted to ethyl benzoate by reaction with: |CBSE 2000] (a) sodium ethoxide (b) ethyl chloride (c) dry \(\mathrm{HCl}-\mathrm{C}_{2} \mathrm{H}_{3} \mathrm{OH}\) (d) ethanol

An organic compound \(A\) on reduction gives compound \(B\) which on reaction with chloroform and potassium hydroxide forms \(C\). The compound \(C\) on catalytic reduction gives \(N\)-methylaniline. The compound \(A\) is: \(\quad\) [CBSE 2000| (a) nitrobenzene (b) nitromethane (c) methylamine (d) aniline

When phenol is treated with \(\mathrm{CHCl}_{3}\) and \(\mathrm{NaOH}\) the product formed is: [CBSE 2002] (a) benzaldehyde (b) salicyaldehyde (c) salicylic acid (d) benzoic acid

Using anhydrous \(\mathrm{AICl}_{3}\) as catalyst, which one of the following reactions produce ethylbenzene? \(\quad\) |CBSE 2004] (a) \(\mathrm{H}_{3} \mathrm{CCH}_{2} \mathrm{OH}+\mathrm{C}_{6} \mathrm{H}_{6}\) (b) \(\mathrm{CH}_{3} \mathrm{CH}=\mathrm{CH}_{2}+\mathrm{C}_{6} \mathrm{H}_{6}\) (c) \(\mathrm{H}_{1} \mathrm{C}=\mathrm{CH}_{2}+\mathrm{C}_{6} \mathrm{H}_{6}\) (d) \(\mathrm{H}_{1} \mathrm{CCH}_{3}+\mathrm{C}_{6} \mathrm{H}_{6}\)

The molecular formula of diphenyl methane is \(\mathrm{C}_{13} \mathrm{H}_{11-}\) How many structural isomers are possible when one of the hydrogen is replaced by a chlorine atom? c1ccc(Cc2ccccc2)cc1 (a) 6 (b) 4 (c) 8 (d) \(\underline{7}\)

Electrolytic reduction of nitrobenzene in acidic medium gives: |CBSE 2005] (a) aniline (b) nitrosobenzene (c) \(N\)-phenylhydroxylamine (d) \(p\)-aminophenol

Ortho and para-nitrophenols are separated by which of the following methods? [AFMC 1995] (a) sublimation (b) crystallisation (c) steam-distillation (d) filteration

Aniline on heating with potassium hydroxide and chloroform produce: [AFMC 1995] (a) phenyl isocyanate (b) phenyl cyanide (c) phenyl isocyanide (d) phenyl thiocyanate

Hinsberg's reagent is: (a) (b) \(\mathrm{C}_{6} \mathrm{H}_{5} \mathrm{SO}_{2} \mathrm{Cl}\) (c) \(\mathrm{C}_{6} \mathrm{H}_{3} \mathrm{SO}_{2} \mathrm{NH}_{2}\) (d) \(\mathrm{CH}_{3} \mathrm{COCH}_{2} \mathrm{COOC}_{2} \mathrm{H}_{3}\)

Phenol on heating with Zn-dust produce: (a) \(\mathrm{C}_{s} \mathrm{H}_{6}\) (b) \(\mathrm{C}_{6} \mathrm{H}_{5} \mathrm{CHO}\) (c) \(\mathrm{C}_{4} \mathrm{H}_{2} \mathrm{ZnO}\) (d) \(\mathrm{C}_{6} \mathrm{H}_{5} \mathrm{CH}_{2} \mathrm{OH}\)

Acetophenone is prepared by the reaction of which of the following in presence of \(\mathrm{AICl}_{3}\) as catalyst: |AFMC 1996] (a) benzene + acetone (b) benzene + acetyl chloride (c) phenol \(+\) acetic acid (d) phenol + acetone

Phenol does not react with: (a) \(\mathrm{NaOH}\) (b) \(\mathrm{KOH}\) (c) \(\mathrm{Na}\) (d) \(\mathrm{Na}_{2} \mathrm{CO}_{3}\)

Aniline and nitrous acid react to produce (a) nitrobenzene (b) benzene diazonium salt (c) phenol (d) chlorobenzene

Coal tar is a main source of : (a) cycloalkanes (b) heterocyclic compounds (c) aromatic compounds (d) aliphatic compounds

\(\mathrm{C}_{6} \mathrm{H}_{6}+\mathrm{CH}_{3} \mathrm{Cl} \stackrel{\mathrm{A} \mathrm{Cl}_{3}}{\longrightarrow} \mathrm{C}_{6} \mathrm{H}_{3} \mathrm{CH}_{3}+\mathrm{HCl}\) is known as: (a) Kolbe's reaction (b) Friedel-Crafts reaction (c) Wurtz reaction (d) Fittig reaction

A compound on treatment with NaOH followed by addition of \(\mathrm{AgNO}_{3}\) produces white precipitate at room temperature, the precipitate is soluble in \(\mathrm{NH}_{4} \mathrm{OH}\). The compound is identified as: [AFMC 1997] (a) vinyl chloride (b) benzyl chloride (c) chlorobenzene (d) ethyl bromide

The conversion of benzaldehyde into benzyl alcohol is known as (a) Cannizzaro's reaction (b) Kolbe's reaction (c) Friedel-Craft reaction (d) Wurtz reaction

A mixture of sodium benzoate and sodalime on heating produces: (a) \(\mathrm{CH}_{4}\) |AFMC 1999] (b) \(\mathrm{C}_{6} \mathrm{H}_{6}\) (c) both (a) and (b) (d) none of these

Chromyl chloride oxidises toluene to benzaldehyde. This reaction is known as : (a) Rosenmund reaction (b) Wurtz reaction (c) Etard reaction (d) Fittig reaction

The main component of middle oil fraction of coal tar distillation is: IAFMC 2000] (a) bemnene (b) phenol (c) naphithalene (d) pyrrole

Phenol is more readily soluble in: (a) NaOll solution (b) dil. \(\mathrm{HCl}\) (c) both \(\mathrm{NaOH}\) and \(\mathrm{HCl}\) (d) \(\mathrm{NaHCO}_{3}\) solution

Bengene does not undergo addition reaction easily because; (a) it has six hydrogen atoms (b) it has a cyclic structure (c) double bonds present in benxene are strong (d) resonance stabilised system is to be preserved

Nitrobenzene on nitration produce: (a) \(o\)-dinitrobenzene (b) \(m\)-dinitrobenzene (c) \(p\)-dinitrobenzene (d) none of these

Which of the following compound can be easily sulphonated? [AFMC 2002] (a) Chlorobenzene (b) Nitrobenzene (c) Toluene (d) Benzene

Among the following groups, the ortho and para directing group is: |AFMC 2003| (a) \(-\mathrm{COCH}_{3}\) (b) \(-\mathrm{CN}\) (c) \(-\mathrm{NHCOCH}_{3}\) (d) \(-\mathrm{COOH}\)

Aniline on treatment with \(\mathrm{HNO}_{2}\) at \(0^{\circ} \mathrm{C}\) to produce which of the following compounds? [AFMC 2003| (a) diazonium salt (b) hydrozo compound (c) nhenol and \(\mathrm{N}_{3}\) (d) nitroaniline

O=C(O)c1ccc(O)cc1 \(X\) is identified as (a) \(2,4,6\)-tribromophenol (b) 2-bromo-4-hydroxylbenzene sulphonic acid (c) 3,5-dibromo-4-hydroxybenzene sulphonic acid (d) 2-bromophenol

Aniline reacts with which of these to form Schiff base? |AFMC 2004] (a) Acetic acid (b) Benzaldehyde (c) Acetone (d) \(\mathrm{NH}_{3}\)

When toluene is treated with \(\mathrm{KMnO}_{4}\), what is produced? [AFMC 2005] (a) Benzene (b) Chlorobenzene (c) Benzaldehyde (d) Benzoic acid

Carbolic acid is: (a) \(\mathrm{C}_{6} \mathrm{H}_{3} \mathrm{CHO}\) (b) \(\mathrm{C}_{6} \mathrm{H}_{6}\) (c) \(\mathrm{C}_{\mathrm{c}} \mathrm{H}_{3} \mathrm{COOH}\) (d) \(\mathrm{C}_{6} \mathrm{H}_{3} \mathrm{OH}\)

Salicylic acid is prepared from phenol by: \(\mid \mathbf{A F}\) (a) Reimer-Tiemann reaction (b) Kolbe's reaction (c) Kolbe-electrolysis reaction (d) none of the above

Reduction of nitrobenzene with \(\mathrm{Sn} / \mathrm{HCl}\) (a) aniline (b) benzene (c) axobenzene (d) azoxybenzene

The compound known as oil of winter green is: |AIIMS 1995\(]\) (a) phenyl acetate (b) phenyl salicylate (c) phenyl bengoate (d) methyl salicylate

Benzaldehyde on refluxing with aqueous alcoholic KCN produce: IAIIMS 19\%| (a) cyanobenzene (b) cyanohydrin (c) benzoyl cyanide (d) benzoin

The compound which does not produce red precipitate with Fehling's solution is: |AIIMS 1996] (a) glucose (b) benzophenone (c) formalin (d) acetaldehyde

Reduction of benzoyl chloride with Pd and \(\mathrm{BaSO}_{4}\) gives: IAIIMS 1997] (a) benzyl chloride (b) benzaldehyde (c) benzoic acid (d) benzene sulphony] chloride

\(\mathrm{BHC}\) is used as an: (a) insecticide (b) disinfectant (c) mosquito repellent (d) antiseptic