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InterviewSolution
This section includes InterviewSolutions, each offering curated multiple-choice questions to sharpen your knowledge and support exam preparation. Choose a topic below to get started.
| 151. |
Acids do not give the characteristic reaction of `(C=O)` group because of :A. dimerisationB. resonanceC. cyclic structuresD. attached alkyl radical |
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Answer» Correct Answer - B Resonance |
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| 152. |
Anhydrous formic acid cannot be obtained from aqueous solution by fractional distillation because :A. it is soluble in waterB. it forms a constant boiling mixture with waterC. its boiling point is very close to waterD. ionsiation of acid increses at their boiling points |
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Answer» Correct Answer - C Boiling point of `HCOOH` is almost same as that of water |
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| 153. |
Which of the following cannot be used for detecting formic acid ?A. `NaHCO_(3)`B. Fehling solutionC. bromine waterD. 2, 4-Dinitrophenylydriazine |
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Answer» Correct Answer - D DNP reagent is used to detect the presence of carbonyl group |
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| 154. |
Anhydrous formic acid is prepared by:A. heating NaOH with CO at 483K under pressureB. heating glycerol with oxalic acid at high temperatureC. catalytic oxidation of ethane in presence of a catalystD. heating lead formate in a current of hydrogen sulphide |
| Answer» Correct Answer - D | |
| 155. |
Alcohols, phenols and acids can be distinguished by reaction withA. `NaHCO_(3)`B. `NaOH`C. `FeCl_(3)`D. all the above |
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Answer» Correct Answer - D (a) alcohols and phenols can be distinguished by NaOH and `FeCl_(3)` solution (b) Phenol and acid can be distinguised by `NaHCO_(3)` |
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| 156. |
Ethanal `+` Aluminium ethoxide `rarr X`. The product X in the above reaction isA. Aluminium acetateB. Ethanoic anhydrideC. Ethyl acetateD. Propanoic acid |
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Answer» Correct Answer - C `CH_(3)CHO + CH_(3) CHO overset(Al(OC_(2) H_(5))_(3))rarr CH_(3)COOH + C_(2)H_(5)OH overset(-H_(2)O)rarr underset("Ethyl acetate")(CH_(3) - overset(O)overset(||)(C) - OC_(2)H_(5))` |
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| 157. |
Which of the following compounds gives benzoic acid on oxidation ?A. ChlorophenolB. ChlorotolueneC. ChlorobenzeneD. Benzyl chloride |
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Answer» Correct Answer - D `C_(6)H_(5)CH_(2)Cl overset([O])rarr C_(6)H_(5)COOH` |
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| 158. |
The final product formed in this reaction is : A. B. C. D. |
| Answer» Correct Answer - D | |
| 159. |
Which of the following is isobutyric acid?A. `CH_(3)CH_(2)CH_(2)COOH`B. `(CH_(3))_(2)CHCOOH `C. `CH_(3)CH_(2)CH_(2)CH_(2)COOH`D. |
| Answer» Correct Answer - B | |
| 160. |
Which of the following is isobutyric acid ?A. `CH_(3)CH_(2)CH_(2)COOH`B. `CH_(3)(CH_(2))_(3) COOH`C. `(CH_(3))_(2)CH - COOH`D. `CH_(3)overset(COOH)overset(|)(C)HCH_(2)CH_(3)` |
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Answer» Correct Answer - C `underset(("Isobutyric acid"))(CH_(3) - underset(CH_(3))underset(|)(CH) - COOH)` |
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| 161. |
Benzoic acid reacts with bromine to giveA. `o-`bromobenzoic acidB. `m-`bromobenzoic acidC. `p-`bromobenzoic acidD. 3, 4-dibromobenzoic acid. |
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Answer» Correct Answer - B `-COOH` is a meta - directing group |
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| 162. |
Which one of the following compounds forms benzoic acid on oxidation?A. ChlorophenolB. Benzyl chlorideC. ChlorobenzeneD. Chlorotoluene |
| Answer» Correct Answer - B | |
| 163. |
Among the following the strongest nucleophile is :A. `C_(2)H_(5)SH`B. `CH_(3)COO^(-)`C. `CH_(3)NH_(2)`D. `NC CH_(2)^(-)` |
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Answer» Correct Answer - D `N -= C - overset(-)(C) H_(2)` is strongest nuclephile as `C-` atom with negative charge has the lowest electronegativity |
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| 164. |
Among the following compounds, most acidic isA. `p-`nitrophenolB. `p-`hydroxybenzoic acidC. `o-`hydroxybenzoic acidD. `p-`toluic acid |
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Answer» Correct Answer - C Due to ortho effect, `o-` hyroxybenzocacid is the strongest acid |
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| 165. |
Acetic anhydride reacts with dimethylamine to form :A. acetamideB. N-methyl acetamideC. N.N-dimethyl acetamideD. dimethyl acetate |
| Answer» Correct Answer - B | |
| 166. |
Acetic anhydride on reduction with `LiAIH_(4)` in ether givesA. acetaldehydeB. ethyl alcoholC. acetoneD. ethane |
| Answer» Correct Answer - C | |
| 167. |
The conpound which on reducting with `LiAiH_(4)` gives two alcohols :A. `CH_(3)COOCH_(3)`B. `CH_(3)COOC_(2)H_(5)`C. `CH_(3)COCH_(3)`D. `CH_(3)CH_(2)CHO` |
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Answer» Correct Answer - A See properties of esters |
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| 168. |
Assertion : Benzoic acid is stronger acid than formic acid Reason : Phenyl group when attached to carbonyl group becomes electron donatingA. Both A and R are true is the correct explanation of AB. Both A and R are true but R is not a correct explanation of AC. A is true but R is falseD. A is false but R is true |
| Answer» Correct Answer - D | |
| 169. |
Which of the following reactions is used to bring about the following conversion ? A. Hofmann reactionB. Curtius reactionC. Ritter reactionD. Schmidt reaction |
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Answer» Correct Answer - D See properties of acids |
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| 170. |
The high boiling points of carboxylic acids are due toA. their dimerisationB. their trimerisationC. their ability to form inter-molecular H-bondD. Both A and C |
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Answer» Correct Answer - D Factual question |
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| 171. |
Select incorrect statementA. NaOH is strong enough to remove the proton from phenol and carboxylic acidsB. `NaHCO_(3)` is only strong enough to remove the proton of the carboxylic acidC. Mixture of phenol and succini acid can be separated using `NaOH`D. Mixture of phenol and succinic acid can be separated using `NaOH` |
| Answer» Correct Answer - D | |
| 172. |
Assertion : Amides react with `Br_(2) + KOH` to give `1^(@)` amine with one carbon less than parent atom Reason : The reaction occurs through a carbene intermediateA. Both A and R are true is the correct explanation of AB. Both A and R are true but R is not a correct explanation of AC. A is true but R is falseD. A is false but R is true |
| Answer» Correct Answer - B | |
| 173. |
Which one is polyprotic acid :A. `CH_(3)COOH`B. `C_(6)H_(5)COOH`C. `C_(6)H_(4) (OH) COOH`D. Malonic acid |
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Answer» Correct Answer - D Malonic acid `[CH_(2) (COOH)_(2)]` is a dibasic acid |
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| 174. |
Which of the following is a polyprotic acid ?A. Salicylic acidB. Oxalic acidC. Glycollic acidD. Lactic acid |
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Answer» Correct Answer - B As oxalic acid can furnish two protons |
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| 175. |
Which of the following order is incorrect w.r.t. property indicated ?A. `underset(("ACID STRENGTH"))("Formic acid " gt " Acetic acid") gt "Propionic acid"`B. `underset(("ACID STRENGTH"))("Cyclohexanol " lt " Phenol " lt "Benzoic acid")`C. `underset(("ACID STRENGTH"))("Benzamide " lt " Aniline " lt " Cycohexylamine")`D. `underset(("ACID STRENGTH"))(FCH_(2) COOH gt ClCH_(2)COOH gt BrCH_(2)COOH)` |
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Answer» Correct Answer - C The answer are based upon the reactions given in Comprehensve Review. |
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| 176. |
Which is a tribasic acid?A. Succinic acidB. Tartaric acidC. Citric acidD. Valeric acid |
| Answer» Correct Answer - C | |
| 177. |
A fruity smell is produced by the reaction of `C_(2)H_(5)OH` withA. `PCl_(5)`B. `CH_(3)COCH_(3)`C. `CH_(3)COOH`D. None of these |
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Answer» Correct Answer - C Alcohols react with acids to form esters which have fruity smell |
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| 178. |
The decreasing order of ester formation with acetic acid in presence of `H^(oplus)` is : (I) A. `(I) gt (II) gt (III) gt (IV)`B. `(I) gt (II) gt (III) gt (IV)`C. `(IV) gt (II) gt (III) gt (I)`D. `(IV) gt (III) gt (II) gt (I)` |
| Answer» Correct Answer - A | |
| 179. |
Identify the organic compound X formed in the following reaction . `CH_(3)COOAg + I_(2) rarr X + AgI + Y` (the equation is unbalanced)A. IodomethaneB. Ethyl iodideC. Methyl ethanoateD. None of these |
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Answer» Correct Answer - C `CH_(3)COOAg + I_(2) rarr CH_(3)I + AgI + CO_(2)` `CH_(3)COOAg + CH_(3)I rarr CH_(3)COOCH_(3) + AgI` (Methyl iodide is most reactive of all the alkyl halides i.e., `CH_(3)Cl, CH_(3)Br, CH_(3)I`) `2CH_(3)COOAg + I_(2) rarr 2AgI + CO_(2) + underset("Methyl ethanoate")(CH_(3)COOCH_(3))` This reaction is known as Birbaum -Simonini reaction |
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| 180. |
The correct order of increasing rate of hydrolysis of the following compund is A. `I lt II lt III`B. `III lt II lt I`C. `I lt III lt II`D. `III lt I lt II` |
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Answer» Correct Answer - B The rate determining step in the hydrolysis of an ester is bimolecular, the larger the R, greater will be the steric retardation since hybridisation of the carbonyl carbon changes from `sp^(2)` to `sp^(3)` (due to increased bonding). The order of increasing rate of hydrolysis is `III lt II lt I` |
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| 181. |
Carbonation of alkyl magnesium halide followed by acidification gives :A. a carboxylic acidB. an alcoholC. an anhydrideD. an aldehyde |
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Answer» Correct Answer - A See preparation of acids |
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| 182. |
Acetic anhydride is used for the detection and estimation ofA. `-OH` groupB. `-COOH` groupC. `-CHO` groupD. `-CONH_(2)` group |
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Answer» Correct Answer - A Acetic anhydride is used for the detection and estimation of `-OH` group |
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| 183. |
The alkaline hydrolysis of esters is also calledA. esterificationB. saponificationC. nutrificationD. alcoholysis |
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Answer» Correct Answer - B Factual question |
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| 184. |
Which of the following is used in preparation of artifical flavours :A. lower alcoholB. ester of lower fatty acidC. ester of higher fatty acidD. lower fatty acids |
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Answer» Correct Answer - B See Esters |
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| 185. |
The reaction between diethyl cadminum and acetyl chloride givesA. Dimethyl kentoneB. Diethyl ketoneC. Ethyl methyl ketoneD. None of these |
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Answer» Correct Answer - C `2CH_(3)COCl + (C_(2)H_(5))_(2) Cd rarr underset("Ethyl methyl ketone")(2CH_(3)COC_(2) H_(5) + CdCl_(2))` |
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| 186. |
Acetyl chloride is reduced to acetaldehyde by:A. `Na- C_(2)H_(5)OH`B. `LiAlH_(4)`C. `H_(2)//Pd-BaSO_(4)`D. `H_(2)//Ni` |
| Answer» Correct Answer - C | |
| 187. |
The IUPAC name of A. 2, 3-dimethyl....... Pentanoyl chlorideB. 2, 4-dimethyl ........pentanoyl chlorideC. 1-chloro-1-oxo-2, 3-dimethyl pentaneD. 2-ethyl-3-methyl butanoyl chloride |
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Answer» Correct Answer - A 1-chloro-1-oxo-2, 3-dimethylpentane |
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| 188. |
The end product in the following sequence is: Acetamide`overset(P_(2)O_(5))to(A)overset(4H)to(B)`A. `CH_(3)NH_(2)`B. `C_(2)H_(5)NH_(2)`C. `CH_(3)CN`D. `CH_(3)COONH_(4)` |
| Answer» Correct Answer - B | |
| 189. |
The IUPAC name of the above acid is A. 1, 2, 3-Propanetricarboxylic acidB. 3-Hydroxy-1, 5-pentanedioic acidC. 3-Hydroxy-3-keto-1, 5-pentanedioic acidD. 1, 3, 5-Trihydroxpental-1, 5-dione |
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Answer» Correct Answer - A `{:(" 3 2 1"),(HOOC - CH_(2)- CH - CH_(2) - COOH),(" |"),(" "COOH),(" 1, 2, 3-Propanetricarboxylic acid"):}` |
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| 190. |
Acetic acid in the vapour state has a molecular weight of 120 becauseA. its molecule gets solidifiedB. its molecules gets stabilized by resonanceC. it undergoes intermolecular H-bonding and exists as the dimerD. it forms intramolecular H-bonding in this conditions |
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Answer» Correct Answer - C See Physical properties of acids |
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| 191. |
When benzene is heated with air at `500^(@)C` in the presence of `V_(2)O_(5)` as catalyst, the major product formed isA. acetic acidB. succinic acidC. malic acidD. maleic anhydride |
| Answer» Correct Answer - D | |
| 192. |
Ammonium acetate on heating gives:A. `N_(2)` gasB. acetic acidC. acetamideD. `NH_(3)` gas |
| Answer» Correct Answer - C | |
| 193. |
Acetic acid dissolved in benzene shows a molecular mass of:A. 30B. 60C. 120D. 240 |
| Answer» Correct Answer - C | |
| 194. |
Ammonium succinate on strong heating gives:A. succinic acidB. succinic anhydrideC. succinimideD. tartaric acid |
| Answer» Correct Answer - C | |
| 195. |
which is the correct alternate?A. (A) `CH_(3)CH_(2)NH_(2)` (B) `CH_(3)-underset(Br)underset(|)"CH"-COOH` `R_(1)to` Schmidt reaction, `R_(2) to` HVZ reactionB. `(A) CH_(3)CH_(2)CONH_(2) , (B) CH_(3)CH_(2)COBr` `R_(1)to` HVZ reaction, `R_(2)to` Schmidt reactionC. `(A) CH_(3)CH_(2)NH_(2), (B) CH_(3)CH_(2)COBr` `R_(1)to` HVZ reaction, `R_(2)to` Schmidt reactionD. None is correct |
| Answer» Correct Answer - A | |
| 196. |
The compound which does not give a crystalline product on reaction with either sodium bisulphite or 2,4-DNP but reduces ammoniacal silver nitrate solution is:A. `C_(6)H_(5)CHO`B. `C_(6)H_(5)CH_(2)OH`C. H-overset(O)overset(||)C-OH `D. `CH_(3)CHO` |
| Answer» Correct Answer - C | |
| 197. |
When acetyl chloride reacts with any amine, the reaction is known as :A. saponificationB. esterificationC. acetylationD. condensation |
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Answer» Correct Answer - C See Acetic chloride |
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| 198. |
Formic acid and acid may be distinguished by the reaction withA. sodiumB. 2, 4-Dinitrophenyl hydrazineC. Sodium ethoxideD. Dilute acidic permanganate |
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Answer» Correct Answer - D `5HCOOH + 3H_(2)SO_(4) + 2KMnO_(4) rarr K_(2)SO_(4) + 2MnSO_(4) + 5CO_(2) + 8 H_(2)O` `CH_(3)COOH + KMnO_(4) + H_(2)SO_(4) rarr` No Reaction. |
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| 199. |
Optical activity is expected for:A. 2-methyl propanoic acidB. 2-chloropropanoic acidC. methyl-2-chloropropanoateD. |
| Answer» Correct Answer - B::D | |
| 200. |
Formic acid gives the test of.A. aldehydic groupB. ketonic groupC. carboxylic groupD. alcoholic group |
| Answer» Correct Answer - A::C | |