Chapter 26

Bromobenzene is heated with \(\mathrm{Mg}\) in dry ether. The resultant solution is treated with dry ice and acidified. The product formed at the end is (a) benzoic acid (b) \(o\)-bromobenzoic acid (c) benzoyl bromide (d) benzyl alcohol

Which of the following compounds on heating at about \(140^{\circ} \mathrm{C}\) gives acetic acid? (a) Succinic acid (b) Malic acid (c) Malonic acid (d) Oxalic acid

ac Which of the following can liberate \(\mathrm{CO}_{2}\) from \(\mathrm{NaHCO}_{3}\) ? (a) Cyclohexanol (b) Phenol (c) 3 -nitrophenol (d) 2, 4, 6 -trinitrophenol

trinitrophenol Which of the following acids has smallest dissociation constant? (a) \(\mathrm{CH}_{3} \mathrm{CHICOOH}\) (b) \(\mathrm{FCH}_{2} \mathrm{CH}_{2} \mathrm{COOH}\) (c) \(\mathrm{BrCH}_{2} \mathrm{CH}_{2} \mathrm{COOH}\) (d) \(\mathrm{CH}_{3} \mathrm{CHBrCOOH}\).

\(\beta\) hydroxy esters can be formed by (a) Claisen condensation (b) Tischenko condensation (c) Reformatsky reaction (d) Knoevengel reaction

-azmgel reaction The reducing property of HCOOH is due to the following group (a) \(-\mathrm{COOH}\) (b) \(-\mathrm{OH}\) (c) \(-\mathrm{CHO}\) (d) \(-\mathrm{H}\)

The reaction gives $$ \mathrm{CH}_{3} \mathrm{CONH}_{2} \frac{\mathrm{NaOBr}}{\mathrm{H}_{2} \mathrm{O}} $$ (a) \(\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{NH}_{2}\) (b) \(\mathrm{CH}_{3} \mathrm{NH}_{2}\) (c) \(\mathrm{CH}_{3} \mathrm{CN}\) (d) \(\mathrm{CH}_{1} \mathrm{Br}\)

The most apporopriate reagent for the conversion of 2 -pentanone to butanoic acid is (a) \(\mathrm{NaO}: \mathrm{H}_{3} \mathrm{O}^{+}\) (b) \(\mathrm{KMnO}_{4}, \mathrm{NaOH} ; \mathrm{H}_{3} \mathrm{O}^{+}\) (c) \(\mathrm{K}_{2} \mathrm{Cr}_{2} \mathrm{O}_{7}, \mathrm{H}_{2} \mathrm{SO}_{4}\) (d) \(\mathrm{AgOH}, \mathrm{NH}_{4} \mathrm{OH} ; \mathrm{H}_{3} \mathrm{O}^{+}\)

H. Acetic acid dissolved in benzene has an apparent molecular mass of (a) 30 (b) 60 (c) 120 (d) 140

Among the following carboxylic acids has the smallest ionization constant ? (a) 2-methylpropanoic acid (b) 2, 2 -dimethylpropanoic acid (c) 2-methylbutanoic acid (d) 3 -methylbutanoic acid

butar Which of the following acids is present in vinegar? (a) hydrochloric acid (b) acetic acid (c) tartaric acid (d) citric acid

Formic acid and acetic acid can be distinguished by using (a) Ammonical \(\mathrm{AgNO}_{3}\) solution (b) \(\mathrm{NaHCO}_{3}\) solution (c) \(\mathrm{NaOH}\) solution (d) Litmus

Identify the main product in the following reaction. \(\mathrm{CH}_{2}(\mathrm{COOH})_{2} \stackrel{\mathrm{P}_{2} \mathrm{O}_{5}, \text { heat }}{\longrightarrow} \mathrm{X}\) (a) \(\mathrm{CH}_{3} \mathrm{COOH}\) (b) \(\mathrm{CO}_{2}+\mathrm{H}_{2} \mathrm{O}\) (c) \(\mathrm{C}_{3} \mathrm{O}_{2}\) (d) \(\mathrm{COOH} . \mathrm{COOH}\)

In a set of reactions, propionic acid yielded a compound ( (D). \(\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{COOH}\) \(\stackrel{\mathrm{SOCl}_{2}}{\longrightarrow}(\mathrm{B}) \stackrel{\mathrm{NH}_{,}}{\longrightarrow}(\mathrm{C}) \stackrel{\mathrm{KOH}, \mathrm{Br}_{\mathrm{t}}}{\longrightarrow}(\mathrm{D})\) The structure of ((D) would be (a) \(\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{NHCH}_{3}\) (b) \(\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{NH}_{2}\) (c) \(\mathrm{CH}_{1} \mathrm{CH}_{2} \mathrm{CH}_{2} \mathrm{NH}_{2}\) (d) \(\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{CONH}_{2}\)

The \(p K_{n}\) of acetylsalicylic acid (aspirin) is 3.5. The \(\mathrm{pH}\) of gastric juice in human stomach is about \(2-3\) and \(\mathrm{pH}\) in the small intestine is about 8. Aspirin will be (a) Unionized in the small intestine and in the stomach (b) Completely ionized in the stomach and almost unionized in the small intestine (c) lonized in the stomach and almost unionized in the small intestine (d) Ionized in the small intestine and almost unionized in the stomach

When \(\mathrm{CH}_{2}=\mathrm{CH}-\mathrm{COOH}\) is reduced with LiAIH \(_{4}\), the compound obtained will be (a) \(\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{COOH}\) (b) \(\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{CHO}\) (c) \(\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{CH}_{2} \mathrm{OH}\) (d) \(\mathrm{CH}_{2}=\mathrm{CHCH}_{2} \mathrm{OH}\)

When propionic acid is treated with aqueous sodium bicarbonate, \(\mathrm{CO}_{2}\) is liberated, The 'C" of \(\mathrm{CO}_{2}\) comes from (a) Methyl group (b) Carboxylic acid group (c) Methylene group (d) Bicarbonate

The major product of nitration of Benzoic acid is (a) 3-Nitrobenzoic acid (b) 4-Nitrobenzoic acid (c) 2-Nitrobenzoic acid (d) 2, 4-Dinitrobenzoic acid

Which of the following carboxylic acids undergoes decarboxylation easily? [IIT 1995] (b) \(\mathrm{C}_{6} \mathrm{H}_{5}-\mathrm{CO}-\mathrm{COOH}\) (c) CC(O)C(=O)O (d) CC(N)C(=O)O

Mercuric chloride is converted to mercury by the following acid (a) formic acid (b) acetic acid (c) oxalic acid (d) acetic acid

Which of the following is the strongest acid ? (a) O=C(O)c1ccccc1[N+](=O)[O-] (b) O=C(O)c1ccc([N+](=O)[O-])cc1 (c) O=C(O)c1cccc([N+](=O)[O-])c1 (d) O=C(O)c1ccccc1

Name the product when salicylic acid is treated with acetyl chloride ? (a) salol (b) oil of wintergreen (c) aspirin (d) none of these

Which of the following acid derivative has the least basic leaving group in a Nucleophilic substitution reaction ? (a) acid chloride (b) anhydride (c) ester (d) amide