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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. |
`(CH_(3))_(2) C = CHCOCH_(3)` can be oxidised to `(CH_(3))_(2) C = CH - COONa ` byA. `NaOH + KOH`B. `NaOH`C. `NaOI`D. `KMnO_(4)//H^(+)` |
| Answer» Correct Answer - C | |
| 152. |
In the reaction `CH_(3) CH = O + A overset("dryHCl") to CH_(3) CH(OC_(2)H_(5))_(2) + H_(2)O` The compound A isA. propan-1- olB. ethanolC. methanolD. `C_(2)H_(5) - O - C_(2) H_(5)` |
| Answer» Correct Answer - B | |
| 153. |
On vigrous oxidation by permangnate solution, `(CH_(3))_(2)C=CH-CH_(2)CH_(3)` gives :A. B. C. D. |
| Answer» Correct Answer - D | |
| 154. |
Aldol condensation is a. electrophilic substitution reaction b. nucleophilic substitution reaction c. elimination reaction d. addition – elimination reaction |
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Answer» Correct answer is d. addition-elimination reaction |
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| 155. |
Distinguish between the following :C6H5—COCH3 and C6H5—CHO |
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Answer» Benzaldehyde and acetophenone can be distinguished by Tollens’ test. Benzaldehyde will form silver mirror, on treatment with Tollens’ reagent whereas acetophenone will not show Tollens’ Test |
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| 156. |
Both carbonyl compounds and acid derivatives though they contain grouping yet the reactions given by them are entirely different. As Aldehydes and Ketones give addition product with a nucleophile, while carboxylic acid derivatives give nucleophilic acyl substitution through addition/elimination mechanism. Where `X- = -Cl - O-overset(O)overset(||)C-R-OR, -NR(R)` etc. Why aldeydes and Ketones give nucleophilic addition reaction while acid derivatives prefer nucleophilic acyl substititution reaction?A. Carbonyl carbon of aldehyde and Ketones are more electron deficient than acid derivativesB. Carbonyl carbon of acid derivatives are more electron deficient.C. Acid derivatives also give addition reactionD. In acid derivatives, acyl carbon is connected with a good leaving group |
| Answer» Correct Answer - D | |
| 157. |
Predict the product and name the reaction:1. HCHO + NaOH → B + C 2. CH3COOH + CH3OH → E |
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Answer» 1. CH3OH + HCOONa – Cannizzaro reaction 2. CH3COOCH3 – Esterication |
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| 158. |
Carboxylic acid decompose into carboxylate ion and H+ ion.1. Explain this on the basis of resonating structure of carboxylic acid.2. Arrange the following in the increasing order of acidity. HCOOH, CH3COOH3. Substantiate. |
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Answer» 1. Carboxylic acid decomposes to give proton and carboxylate ion and is stabilized by resonance. This explains the acidic character of carboxylic acid. 2. CH3COOH < HCOOH 3. In acetic acid the electron donating effect (+l – effect) of -CH3 group destabilises the carboxylate anion and decreases the acid strength. Whereas in formic acid the H atom has not electron withdrawing or electron donating effect. |
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| 159. |
Assertion : The boiling points of given compounds follow the order : `CH_(3)CH_(2)CH_(2)CHO ~~CH_(3)CH_(2)CH_(2)CH_(2)CH_(3) lt CH_(3)CH_(2)CH_(2)CH_(2)OH ~~ H_(5)C_(2)OC_(2)H_(5)` Reason : Boiling point depends upon molecualr mass only.A. If both assertion and reason are true and reason is the correct explanation of assertion.B. If both assertion and reason are true but reason is not the correct explanation of assertion.C. If assertion is true but reason is false.D. If both assertion and reason are false. |
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Answer» Correct Answer - D The correct order is : `CH_(3)CH_(2)CH_(2)CH_(2)CH_(3) lt H_(5)C_(2)OC_(2)H_(5) lt CH_(3)CH_(2)CH_(2)CHO lt CH_(3)CH_(2)CH_(2)CH_(2)OH` Boiling point depends upon the nature of intermolecular forces, stronger the forces, higher is the boiling point. `CH_(3)CH_(2)CH_(2)CH_(2)OH` molecules are associated due to extensive intermolecular hydrogen bonding, `CH_(3)CH_(2)CH_(2)CHO` has stronger dipole-dipole attractions as compared to `H_(5)C_(2)OC_(2)H_(5) and CH_(3)CH_(2)CH_(2)CH_(2)CH_(3)` molecules have only van der Waals forces. |
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| 160. |
The general formula of `C_(n)H_(2n)O_(2)` could be for open chainA. DiketonesB. Carboxylic acidC. DiolsD. Dialdehyde |
| Answer» Correct Answer - B | |
| 161. |
The general formula of an ester, where R represents an alkyl group , isA. ROHB. RCOOHC. RCOORD. ROR |
| Answer» Correct Answer - C | |
| 162. |
Vinegar obtained from canesugar containsA. Citric acidB. Lactic acidC. Acetic acidD. Palmitic acid |
| Answer» Correct Answer - C | |
| 163. |
Vinegar is an aqueous solution ofA. acetic acidB. formic acidC. vitamin ED. ethanol |
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Answer» Correct Answer - A Aquesous solution of `CH_(3)OOH` is called vinegar. |
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| 164. |
Acetic acid can be halogenated in presence of phosphorus and chlorine. Formic acid cannot be halogenated with same way because ofA. presence of `alpha`- H atom in formic acidB. presence of `alpha`- H atom in acetic acidC. absence of `alpha` - H atom in `CH_(3)COOH`D. higher acidic strength of acetic acid than formic acid. |
| Answer» Correct Answer - B | |
| 165. |
Vinegar contains :A. `15-20%`B. `90-100%`C. `7-8%`D. `10-12%` |
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Answer» Correct Answer - C Vinegar is a dilut solution of acetic acid in water. Which contains 7-8 acetic acid. |
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| 166. |
Identify the products (X) and (Y) in the given reaction: A. X = Acetophenone, Y = m-NitroacetophenoneB. X = Toluene, Y = m-NitroacetotolueneC. X = Acetophenone, Y = o and p - DinitroacetophenoneD. X = Benzaldehyde, Y = m-Nitrobenzaldehyde |
| Answer» Correct Answer - A | |
| 167. |
Which of the following reactions does not occur ?A. B. C. D. |
| Answer» Correct Answer - D | |
| 168. |
Which of the following will not yield acetic acid on strong oxidation ?A. ButanoneB. PropanoneC. Ethyl ethanoateD. Ethanol |
| Answer» Correct Answer - C | |
| 169. |
`CH_(3)COOH` is weaker acid than `H_(2)SO_(4)`. It is due toA. more ionisationB. less ionisationC. covalent bondD. electrovalent bond |
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Answer» Correct Answer - B `CH_(3)COOH` is weakar acid than `H_(2)SO_(4)`. The reason is that `CH_(3)COOH` is weakly ionised in comparison with `H_(2)SO_(4)` |
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| 170. |
Which of the following is 2- phenylpentanoicacid ?A. B. C. D. |
| Answer» Correct Answer - D | |
| 171. |
n-valeric acid is functional isomer ofA. methyl propionateB. n-butyl formateC. propyl isobutyrateD. ethyl isobutyrate |
| Answer» Correct Answer - B | |
| 172. |
The end product of following sequence of reaction is `CH_(3) - CHO overset([O]) to A overset(NH_(3)) to B overset(Delta) to C`A. `CH_(3)COONH_(4)`B. `CH_(3)CONH_(2)`C. `CH_(3)COOH`D. `CH_(3) - OH + N_(2)` |
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Answer» Correct Answer - B `CH_(3) - CHO overset([O]) to CH_(3) - COOH overset(NH_(3)) to CH_(3) - COONH_(4) overset(Delta) to CH_(3) - CONH_(2+) H_(2)O` |
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| 173. |
Butyric acid and isobutyric acid areA. chain isomersB. position isomersC. metamersD. tautomers |
| Answer» Correct Answer - A | |
| 174. |
Which of the following is isobutyric acidA. B. C. D. |
| Answer» Correct Answer - C | |
| 175. |
I.U.P.A.C name of ester isA. alkoxy alkaneB. alkkoxy alkeneC. alkane alkanoateD. alkyl alkanoate |
| Answer» Correct Answer - D | |
| 176. |
Which of the following it the most stable acid ?A. `CH_(2)(F) COOH`B. `CH_(2)(Br) COOH`C. `CH_(2)(Cl) COOH`D. `CH_(2)(I) COOH` |
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Answer» Correct Answer - D Electron withdrawing groups or atoms increase the strength of acid. More the elec tron withdrawing power, more the strength of acid. In halogens electron withdrawing power is , ` F gt Cl gt Br Gt I`. Hence, `CH_(2)ICOOH` is stable acid. |
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| 177. |
Which of the following carbonyl oxygen will form strongest hydrogen bond with `H_(2)O` molecule?A. B. C. D. |
| Answer» Correct Answer - B | |
| 178. |
Assertion : In formaldehyde all the four atoms lie in one plane.Reason : Carbonyl carbon forms a `pi`-bond with oxygen by overlapping of p -orbitals.A. If both assertion and reason are true and reason is the correct explanation of assertion.B. If both assertion and reason are true but reason is not the correct explanation of assertion.C. If assertion is true but reason is false.D. If both assertion and reason are false. |
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Answer» Correct Answer - B The carbonyl carbon is `sp^(2)` hybridised and forms three sigma bonds. Thus carbonyl carbon and three atoms attached to it lie in the same plane and `pi`- electron cloud is above and below this plane. |
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| 179. |
Assertion : `beta`- hydrogen atom of carbonyl compounds is acidic in nature. Reason : `beta`- hydrogen is directly attached to carbon next to carbonyl carbon.A. If both assertion and reason are true and reason is the correct explanation of assertion.B. If both assertion and reason are true but reason is not the correct explanation of assertion.C. If assertion is true but reason is false.D. If both assertion and reason are false. |
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Answer» Correct Answer - D `alpha`- hydrogen is attached to carbon next to carbonyl carbon and it is acidic in nature. |
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| 180. |
General formula for carboxylic acid isA. `C_(n) H_(n)O_(2)`B. `C_(n)H_(2n)O_(2)`C. `C_(n)H_(2n)O`D. `C_(n)H_(2n^(+2))O_(2)` |
| Answer» Correct Answer - B | |
| 181. |
Which of the following is correct ?A. reduction of any aldehyde gives `2^(@)` alcoholB. reduction of any ketone gives tertiary alcoholsC. Wolff - Kishner reduction convert ` gt C = O " to " -CH_(2) - OH` groupD. Ozonolysis of alkene in the presence of zinc gives aldehydes or ketones/mixture of aldehyde and ketones |
| Answer» Correct Answer - D | |
| 182. |
`C_(n)H_(2n) O` is general formula forA. aldehydesB. ketonesC. all carbonyl compoundsD. aldehyde and ketones |
| Answer» Correct Answer - D | |
| 183. |
What is the IUPAC name of compound when carbonyl carbon atom is attached to phenyl group and ethyl groupA. propanonebenzeneB. 1-phenylpropan-1-oneC. 2-phenylpropan -1-oneD. propiophenone |
| Answer» Correct Answer - B | |
| 184. |
Which of the following has highest Pka value ?A. `C_(6)H_(5) - COOH`B. `CH_(3) - OH`C. `C_(6)H_(5) - OH`D. `CH_(3) - COOH` |
| Answer» Correct Answer - B | |
| 185. |
Which one of the following compounds forms a red coloured solution on treatement with neutral `FeCl_(3)` solution ?A. `CH_(3)COOCH_(3)`B. `CH_(3)OCH_(3)`C. `CH_(3)CH_(2)OH`D. `CH_(3)COOH` |
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Answer» Correct Answer - D `3CH_(3)COOH+ FeCl_(3) to underset(("red colour")) underset("Ferric acetate")((CH_(3)COO)_(3))Fe3HCl` |
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| 186. |
`Aoverset(HCl)to(CH_(3))_(2)C=CHOCH_(3),A` isA. acetoneB. acetaldehydeC. propionaldehydeD. formaldehyde |
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Answer» Correct Answer - A Acetone `(CH_(6)COCH_(3))` undergoes Condensation reaction in the presence of HCl to products mesityl oxide. `underset(A)(2CH_(3))CHCH_(3) overset(CHl)underset(-H_(2)O)to underset(4-"methyl pent-3-en-2-one ro mesityl oxide")((CH_(3))_(2)-C=CHOOCH_(3))` |
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| 187. |
Ozonolysis of `C_(7)H_(14)` give methanal and 2- methyl pentan -3- one . The `C_(7)H_(14)` isA. 2- ethyl 3 - methyl but -1- eneB. 3- ethyl -2- methyl but -3- eneC. hept -1- eneD. hept -2- ene |
| Answer» Correct Answer - A | |
| 188. |
Which of the following is an acetaldoxime?A. `CH_(3)CH=N-NH_(2)`B. `CH_(3)CH=N-OH`C. `(CH_(3))_(2)C=N-OH`D. `CH_(2)=N-OH` |
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Answer» Correct Answer - B Acetaldoxime is the oxime of acetaldehyde. `underset("Acetaldehyde")(CH_(3)-CH-O)+underset("Hydroxyl amine")(H_(2)NOH) to underset("Acetaldoxime")(CH_(3)CH=NOH)+H_(2)O` |
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| 189. |
Which of the following is weakest acidA. B. C. `H-COOH`D. |
| Answer» Correct Answer - A | |
| 190. |
Product of the following reaction is A. B. C. D. |
| Answer» Correct Answer - D | |
| 191. |
Which of the following react with `NaOH` produces acid and alcohol ?A. `C_(6)H_(5)CHO`B. `CH_(3) - CHO`C. `CH_(3)COOH`D. `C_(6)H_(5)COOH` |
| Answer» Correct Answer - A | |
| 192. |
In the reaction `CH_(3) - overset(C_(2)H_(5))overset(|) (C) = O +HCN to A overset(H_(2)O^(+)) to B ` The compound B isA. it is a tautomer of ketoneB. it is a functional isomer of ketoneC. do not show optical activityD. show optical activity |
| Answer» Correct Answer - D | |
| 193. |
Following compound on hydrolysis gives A. B. C. D. |
| Answer» Correct Answer - C | |
| 194. |
Benzoic acid is obtained by hydrolysis ofA. B. C. D. |
| Answer» Correct Answer - A | |
| 195. |
Aldehydes are characterised by the general formulaA. `C_(n)H_(2n)O`B. `C_(n)H_(2n)`C. `C_(n)H_(2n+)OH`D. `C_(n)H_(2n+2)O` |
| Answer» Correct Answer - A | |
| 196. |
Corrosive sublimate, `HgCl_(2)` can be used to distinguish betweenA. formic acid and acetic acidB. acetaldehyde and butanoneC. formaldehyde and propanoneD. All of the above |
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Answer» Correct Answer - A `2HCOOH_2HgCl_(2) to Hg_(2) Cl_(2)+CO_(2)+O` `CH_(3)COOH+HgCl_(2) to"no reaction"` |
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| 197. |
Which of the following does not give benzoic acid on hydrolysis?A. Phenyl cyanideB. Benzoyl chlorideC. Benzyl chlorideD. Methy benzoate |
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Answer» Correct Answer - C Benzyl chloride on hydrolysis gives benyzyl alcohol . `underset("Beznyla chloride")(C_(6)H_(5)CH_(2)Cl) overset(Aq. NaOH) underset("boil")tounderset("Benzyl alcohol") (C_(6)H_(5)CH_(2)OH)+NaCl` |
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| 198. |
Find out final product in following reaction A. B. C. D. |
| Answer» Correct Answer - C | |
| 199. |
Among the given compounds A. `III gt IV gt I gt II`B. `I gt IV gt II gt III`C. `III gt I gt IV gt II`D. `III gt I gt II gt IV` |
| Answer» Correct Answer - C | |
| 200. |
Amide on heating with `P_(2)O_(5)` givesA. amineB. nitrileC. aldehydeD. ketone |
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Answer» Correct Answer - B `H_(3)C-underset("Amide")underset(O)underset(||)C-NH_(2) overset(P_(2)O_(5)) underset(Delta)to underset(("nitrile"))underset("Methyl cyanide")(CH_(3)CN)+H_(2)O` |
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