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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.
| 1. |
Assertion: The acetate ion is resonance stablized Reason : Acetate ion is more basic than the methoxide ion.A. If Both assertion and reason are true reason is the correct explation of the assertion.B. If Both assertion and reason are true but reason is not the correct explation of the assertion.C. If assertion is true but reason is false.D. If assertion is false but reason is true. |
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Answer» Correct Answer - C Assertion is correct as conjugate base of a strong acid is weak . Since `CH_(3)COOH` is a stronger acid than `CH_(2)OH. CH_(3)COO^(-)` is a weaker base than `(OCH_(2)^(-))`. |
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| 2. |
Statement-1: When PhCHO is made to react in `D_(2)O`, deuterium in incorporated in product in Cannizzaro reaction. and Statement-2: In cannizzaro reaction transfer of hydride takes place from one molecule to other.A. Statement-1 is True, Statement-2 is true, statement-2 is a correct explanation for statement-2B. Statement -1 is true, Statement-2 is true, statement-2 is not a correct explanation for statement-2C. Statement-1 is true, statement -2 is FalseD. Statement-1 is False, Statement-2 is true |
| Answer» Correct Answer - D | |
| 3. |
Which of the following compound does not undergo Cannizzaro reaction ?A. EthanolB. MethanalC. BenzaldehydeD. 2,2,4,4- tetra methyl 3- pentanone |
| Answer» Correct Answer - A | |
| 4. |
Which of the following does not react with phenyl hydrazine ?A. EthanolB. EthanalC. AcetoneD. 2- pentanone |
| Answer» Correct Answer - A | |
| 5. |
Ester on hydrolysis with dil HCl gives :(a) RCOOH + ROH (b) RCOR + ROH (c) ROH + ROH (d) RCOR + RCOOH |
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Answer» Option : (a) RCOOH + ROH |
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| 6. |
The best reagent to convert pent-3-en-2-ol into pent-3-en-2-one isA. Acidic `KMnO_(4)`B. Alkaline `K_(2) Cr_(2) O_(7)`C. Chromic anhydride in glacial acetic acidD. Pyridinium chlorochromate |
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Answer» Correct Answer - D It oxidises only - `OH` group and not `C = C`. |
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| 7. |
Which is the best reagent for the following transformation? `CH_(3)-C-=C-CH_(2)-overset(O)overset(|)(C)-Cl to CH_(3) -C-=C-CH_(2)-overset(O)overset(||)(C)-H`A. `Li[{CH_(3)}_(3)AIH]//78^(@)C`B. `Pd//BaSO_(4)//H_(2)`C. `LiAIH_(4) then CrO_(3)-H_(2) SO_(4)`D. `NaBH_(4) then CrO_(3)-H_(2) SO_(4)` |
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Answer» Correct Answer - A Given hydride is very bulky, brings about reduction at acid chloride and that too up to aldehyde level but not at olefinic triple bond. |
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| 8. |
`CH=CHunderset(H_(2)SO_(4))overset(HgSO_(4))rarrAunderset(H_(2)O)overset(CH_(3)MgBr)rarrBoverset(P//Br_(2))rarrC.` Here C is `:`A. `CH_(3)CH(Br)CH_(3)`B. `CH_(3)-CH_(2)-CH_(2)-Br`C. `CH_(2)=CH-Br`D. `Br-CH=CH-CH_(3)` |
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Answer» Correct Answer - 1 `CH=CHunderset(H_(2)SO_(4))overset(HgSO_(4))rarr CH_(3)-CHOunderset(H_(2)O)overset(CH_(3)MgBr)rarrCH_(3)-underset(underset(OH)|)(C)H-CH_(3)overset(P//Br_(2))rarrCH_(3)-underset(underset(Br)|)(C)H-CH_(3)` |
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| 9. |
Isopropyl alcohol on oxidation formsA. acetoneB. etherC. acetaldehydeD. ester |
| Answer» Correct Answer - A | |
| 10. |
Propanone can be prepared from ethyne byA. passing a mixture of ethyne and steam over a catalyst, magnesium at `420^(@)C`B. passing a mixture of ethyne and ethanol over a catalyst zinc chromiteC. boiling ethyne with water and `H_(2)SO_(4)`D. treating ethyne with lodine and NaOH. |
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Answer» Correct Answer - A `2CH-=CH+3H_(2)Ooverset(420^(@)C)underset("Mg or Zinc vanadate")to CH_(3)COCH_(3)+CO_(2)+2H_(2)` |
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| 11. |
An optical active alcohol of formula `C_(4)H_(10)O` on oxidation given which of the following compound?A. `(CH_(3))_(2)CHCHO`B. `(CH_(3))_(2)C=CH_(2)`C. `CH_(3)COC_(2)H_(5)`D. `CH_(3)CH_(2)CH_(2)CHO` |
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Answer» Correct Answer - C Molecular formula `C_(4)H_(10)O` has four isomers i.e. n - butyl alcohol, isobutyl alcohol , sec. butyl alcohol, t-butyl and on oxidation gives ethyl methyl ketone. `CH_(3)CHOHC_(2)H_(5) overset("oxidation") to CH_(3)COC_(2)H_(5) + H_(2)O` |
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| 12. |
Propanone can be obtained from oxidation of what ?A. propan -2-olB. propan - 1-olC. butan - 2- olD. 2-methylbutan - 1 -ol |
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Answer» Correct Answer - A `CH_(3)CHOHCH_(3) overset("oxidation") to CH_(3)COCH_(3)+H_(2)O` |
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| 13. |
An isomer of `C_(3)H_(6)Cl_(2)` on boiling with aq. KOH give acetone. Hence, the isomer is ,A. 2,2- dichloropaneB. 1,2-dichloropropaneC. 1,1-dichloropaneD. 1,3-dichloropropane |
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Answer» Correct Answer - A `CH_(3)C Cl_(2)CH_(3) + 2KOH overset(aq.) toCH_(3) COCH_(3) + 2 KCl` |
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| 14. |
Friedel Creft acetylation of benzene givesA. benzophenoneB. acetophenoneC. alkyl benzeneD. diphenyl |
| Answer» Correct Answer - B | |
| 15. |
In the following sequence fo reaction end product is . `CH -= CH overset(Hg^(+)//H_(2)SO_(4))to B overset([O]) to C overset(Ca) to D overset("dry distillati on ") to E `A. acetaldehydeB. propanoneC. methanalD. ethanoic acid |
| Answer» Correct Answer - B | |
| 16. |
The compound that does `NOT` liberate `CO_(2)`, on treatment with aqueous sodium bicarbonate isA. Benzoic acidB. Benzene sulphonic acidC. Salicylic acidD. Carbolic acid (phenol) |
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Answer» Correct Answer - B Carbolic acid (Phenol) is weak acid and does not liberate `CO_(2)` on treatment with aq. `NaHCO_(3)` solution. |
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| 17. |
Assertion : cis- 3 - chloroprop - 2enoic acid is less stable than its trans-form. Reason : Dipole momentof cis-form is greater than transform.A. If Both assertion and reason are true reason is a true explation of the assertion.B. If Both assertion and reason are true but the reason is not the correct explation of the assertion.C. If assertion is true but reason is false.D. If assertion is false but reason is true. |
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Answer» Correct Answer - B Assertion is true because usually, for acrylic systems trans -isomers are more stable than cis-isomers. This is due to increased unfavaurable stric interaction of the subtituents in cis-isomer. Reason is also true because generally the dipole moment of trans-from is zero (or) depending whether the subtituents on both sides of double bond are same or not while cis-form are polar in nature with contain value of dipole moment. |
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| 18. |
Assertion : `2, 2-` Dimethylpropanal undergoes Cannizzaro reaction with cone. `NaOH` Reason : Cannizzaro reaction is a disproportionation reactionA. If Both assertion and reason are true reason is a true explation of the assertion.B. If Both assertion and reason are true but the reason is not the correct explation of the assertion.C. If assertion is true but reason is false.D. If assertion is false but reason is true. |
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Answer» Correct Answer - B Aldehydes which do not contain `alpha`-hydrogen undergo Cannizzaro reaction. |
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| 19. |
A β-hydroxyl carbonyl compound is obtained by the action of NaOH on :(a) HCHO(b) C6H5CHO (c) CR3CHO (d) CH3CHO |
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Answer» Option : (d) CH3CHO |
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| 20. |
Which of the following compound does not give acetic acid on oxidation ?(a) Ethanol (b) Propan-l-ol (c) Propan-2-ol (d) 2-Methyl propan-2-ol |
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Answer» Option : (b) Propan-l-ol |
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| 21. |
A carboxylic acid resembles an alcohol with respect to its reaction with :(a) acidified K2Cr2O7 (b) washing soda (c) caustic soda (d) sodium metal |
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Answer» Option : (d) sodium metal |
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| 22. |
Write the IUPAC name of the following : |
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Answer» Hex-2-en-4yn-oic acid. |
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| 23. |
The smell of bitter almond is given by the compound. (a) Benzoic acid (b) Benzaldehyde (c) Vanillin (d) Cinnamaldehyde |
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Answer» Option : (b) Benzaldehyde |
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| 24. |
Write the IUPAC name of |
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Answer» 3-Bromo-5-chloro Benzoic acid. |
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| 25. |
Write IUPAC name of : |
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Answer» IUPAC name : Ethanedioic acid |
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| 26. |
Write the IUPAC name of the following compound: |
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Answer» Ethyl-4-chlorobenzoate. |
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| 27. |
Which of the following carbonyl compounds undergoes self redox reaction in presence of concentrated base?(a) 3-Methylpentanal (b) 2-Chlorobutanal (c) 2,2-Dimethylpropanal (d) tert-Butyl methyl ketone |
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Answer» Option : (c) 2,2-Dimethylpropanal |
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| 28. |
Name the reagents used in the following reaction : |
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Answer» Alkaline potassium permanganate (KMnO4, KOH) |
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| 29. |
Name the reagents used in the following reactions : |
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Answer» Lithium aluminium hydride (LiAlH4). |
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| 30. |
Give a chemical test to distinguish between each of the following pair of organic compounds. 1. Propanal and Propanol 2. Propanone and Propanal |
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Answer» 1. Propanal is an aldehyde and it gives a silver mirror with Tollens’ reagent while propanol is an alcohol and will not answer Tollens’ test. 2. Propanone gives yellow precipitate of iodoform on reaction with I2 and NaOH while propanal does not give iodoform test. OR Propanal gives silver mirror with Tollens’ reagent while propanone does not give silver mirror test. |
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| 31. |
Give a simple chemical test to distinguish between the following pair of compounds : CH3CH2CHO and CH3CH2COCH3 |
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Answer» Propanal and propanone can be distinguished by their reactions with Tollens’ reagent. Propanal will form the silver mirror, but propanone does not react. |
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| 32. |
Which regent below cannot reduced with an acid chloride to an aldehyde?A. `Pd//Ba SO_(4)`B. `Na//C_(2) H_(5) OH`C. `LiAlH [OC(CH_(3))_(3) ]_(3) at - 80^(@) C`D. `[AlH {CH_(2) CH (CH_(3))_2}_(2)] at - 80^(@) C` |
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Answer» Correct Answer - B `Na//C_(2) H_(5) OH` further reduces to alcohols. |
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| 33. |
`2CH_(3)-underset(O)underset(||)(C)-CH_(3) underset(H^(+))overset(Mg//Hg)to` Product in the reaction isA. `H_(3)C-underset(OH)underset(|)overset(CH_(3))overset(|)(C)-underset(OH)underset(|)overset(CH_(3))overset(|)(C)-CH_(3)`B. `CH_(3)-underset(O)underset(||)(C)-O-underset(O)underset(||)(C)-CH_(3)`C. `CH_(3)-underset(OH)underset(|)(CH)-underset(OH)underset(|)(CH)-CH_(3)`D. None of these |
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Answer» Correct Answer - A `2CH_(3)-underset("Acetone")(CO)-CH_(3) overset(Mg//Hg)underset(H_(2)O) to underset("(Pinacol)")(H_(3)C-overset(CH_(3))overset(|)underset(OH)underset(|)(C)-overset(CH_(3))overset(|)underset(OH)underset(|)(C)-CH_(3)) |
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| 34. |
The end produce in the following sequence of reaction is `HC = CH overset(1%HgSo_(4))underset(20%H_(2)SO_(4)) to A overset (CH_(3) Mg X) to B overset (|0|) to`A. Acetic acidB. IsopropyI alcoholC. AcetoneD. Ethanol |
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Answer» Correct Answer - C `HC = CH |
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| 35. |
`CH_(3) - Ch_(2) - c = overset(HgSO_(4))underset(H_(2)SO_(4))to`, the compound A isA. `CH_(3) - CH_(2) - CH(OH) - CH_(3)`B. `CH_(3) - CH_(2) - CH_(2) - CHo`C. `CH_(3) - CH_(2) - CH_(2) - COOH`D. None of these |
| Answer» Correct Answer - A | |
| 36. |
`underset((A)) (PhCONH_2) underset(KOBr)rarr (B) underset(MeOH)rarr (C)` Product is `( C)` is :A. `PhNH_(2)`B. `PhNHCOOMe`C. `PhNHCOOPh`D. None of these |
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Answer» Correct Answer - B Hofmannbromamide reactions .The product `(PH-N= C= 0)` reacts with `MeOH` to give urathane `(Ph- NH - COOMe)`. |
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| 37. |
Select the said (S) which cannot be prepared by Grignard reagent.A. acetic acidB. succine acidC. Formic acidD. All of these |
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Answer» Correct Answer - C Formic acid cannot be prepared by Grignard reagent. |
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| 38. |
Higher carboxylic acids are insoluble in water due toA. increased hydrophobic interaction of the hydrocarbon partB. decreased hydropophobic interaction of the hydrocaarbon partC. Both (a) and (b)D. None of the above |
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Answer» Correct Answer - A Higher carboxylic acids are partically insoluble in water due to the increased hydrophobic interaction of hydrocarbon part. |
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| 39. |
What is the product in the reaction `CH_(3) MgBr overset((i)CO_(2)) underset((ii)H_(2)O) to X`A. acetaldehydeB. Acetic acidC. Formic acidD. Formaldehyde |
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Answer» Correct Answer - B `CH_(3)MgBr+CO_(2) to CH_(3) CO overset(-)O overset(+)MgBr overset(H_(2)O) to CH_(3)COOH+Ng(OH)Br` |
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| 40. |
Final product of following reaction is `CO_(2) + (CH_(3))_(3) C - MgBr underset((ii) H_(3)O^(+)) overset((i) "dry ether") to A underset("Red P") overset(Br_(2)) to B `A. `CH_(3) - underset(Br) underset(|) overset(CH_(3)) overset(|) (C) - COOH`B. `CH_(3) - underset(CH_(3)) underset(|) overset(CH_(3)) overset(|) (C) -underset(Br) underset(|) (CH) - COOH`C. `CH_(3) - CH_(2) - underset(Br) underset(|) (CH) - COOH`D. No product will be formed . |
| Answer» Correct Answer - D | |
| 41. |
Product of the following reaction `underset(H_(2)O_(2))overset(HBr) to A overset("Mg/ether") to B underset(H_(3)O^(+)) overset(CO_(2)) to C`A. B. C. D. |
| Answer» Correct Answer - C | |
| 42. |
Product of the following reaction is `+CO_(2) underset(H_(3)O^(+)) overset("dry ether") to `A. B. C. D. |
| Answer» Correct Answer - C | |
| 43. |
Dry ice and benzyl magnesium halide producesA. benzoic acidB. phthalic acidC. 2-phenylethanoic acidD. 2- phenylpropanoic acid |
| Answer» Correct Answer - C | |
| 44. |
Dry ice reacts with n-propyl magnesium iodide to giveA. propyl acetic acidB. propionic acidC. butanoic acidD. none of these |
| Answer» Correct Answer - C | |
| 45. |
Which of the following reagent produces 2- methyl propanoic acid with dry ice ?A. `CH_(3)MgI`B. `C_(2)H_(5)MgI`C. `(CH_(3))_(2) CHMgI`D. `C_(3)H_(7)MgI` |
| Answer» Correct Answer - C | |
| 46. |
An alkene of molecular formula `C_(9) H_(18)` on ozonolysis gives `2.2` dimethyl propanal and `2`- butanone, then the alkene isA. 2,2,4-trimethylhex-3-eneB. 2,2,6-trimethylhex-3-eneC. 2,3,4-trimethylhex-2-eneD. 2,2,4-trimethylhex-2-ene |
| Answer» Correct Answer - A | |
| 47. |
A reagent which reacts differently with `CH_(2)O, C_(2)H_(4)O,C_(3)H_(6)O` isA. `NH_(2)OH`B. `C_(6)H_(5)NHNH_(2)`C. NCND. `NH_(3)` |
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Answer» Correct Answer - D The reagents a , b , c reacts with the carbonyl compounds in a same manner and only `NH_(3)` react differently. Formaldehyde is reacted with ammonia give urotropine. Acetaldehyde reacts ammonia give acetaldehyde amine and acetone reacts ammonia give diacetone amine. |
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| 48. |
2-butanone can be obtained heating a mixture of calcium salt ofA. formic acid and butyric acidB. propionic acid and formic acidC. propionic acid and acetic acidD. acetic acid and formic acid |
| Answer» Correct Answer - C | |
| 49. |
Which of the following reagent is used to convert `gt C = O " to " gt CH_(2) `?A. `ZnHg + H_(2)O`B. `ZnHg + conc. HCl`C. `NaHg + H_(2)O`D. Sn + conc. HCl |
| Answer» Correct Answer - B | |
| 50. |
Certain dicarboxylic acids spontaneously eliminate water when heated forming cycioc anhydirides. But for the reaction to be successfully. The cyclic anhydrides product must normally have a ring size of fivee or six members. There are two important reasons, first, the second carboxyl group can serve as the acid catalyst (by intramolecular proton transfer), as well as the nucleophile. And second, the high temperature involved reduce the need for catalyst. Which of the following dicarboxylic acid would you expect to form cyclic anhydride?A. B. C. D. |
| Answer» Correct Answer - C | |