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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.
| 351. |
Bakelite is a polymer ofA. HCHO + phenolB. HCHO + aldehyde (acetaldehyde)C. Phenol `+ H_(2) SO_(4)`D. HCHO + acetone |
| Answer» Correct Answer - A | |
| 352. |
Reduction of aldehydes and krtons into hydrocarbons using `Zn - Hg + HCI`colled.A. Cope reactionB. Dow reactionC. Wolff-Kishner reactionD. Clemmensen reduction |
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Answer» Correct Answer - D It is called Clemmensen reduction. |
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| 353. |
`CH_(3) COCI overset (2H)underset (Pd//BaSO_(4)) to CH_(3) CHO + HCI`: The above reaction is calledA. Reimer - Tiemann reactionB. Cannizaro reactionC. Rosenmund reactionD. Reformatsky reaction |
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Answer» Correct Answer - C `CH_(3) COCI overset(2H) underset(Pd//Ba SO_(4)) to CH_(3) CHO + HCI` |
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| 354. |
In which of the of the following reaction aromatic aldehyde is treated with acid anhydride in prence of corresponding salt of the acid to give unsaturated aromtic acidA. Friedel - Crafts reactionB. Perkin reactionC. Wurtz reactionD. None of these |
| Answer» Correct Answer - B | |
| 355. |
`3 CH_(3) COCH overset (HCI) to (CH_(3))_(2) C = CH - CO - CH = C(CH_(3))_(2)` `(B)` This polymer (B) is obtainned gas. B can beA. PhoroneB. FormoseC. Diacetone alcoholD. Mesityl oxide |
| Answer» Correct Answer - A | |
| 356. |
`CH_(3) - CH = CH - CHO ` is oxidised to ` CH_(3) - CH = CH - COOH` using oxidising agentA. alkaline `KMnO_(4)`B. `K_(2)Cr_(2)O_(7) + conc. H_(2) SO_(4)`C. dil `NHO_(3)`D. ammoniacal `AgNO_(3)` |
| Answer» Correct Answer - D | |
| 357. |
Identify (X), (Y) and (Z) retgents in the given sequence of reaction. `CH-=CH overset(X) to CH_(3)CHO overset(Y) to CH_(3)CH(OH)CH_(3) overset(Z) to CH_(3)COCH_(3)`A. `X=H_(2)SO_(4), Y=H_(2)O//OH^(-), Z=PCl_(5)`, heatB. `X=HNO_(3), Y=Na_(2)CO_(3),Z=H_(2)SO_(4)`, heatC. `X=H_(2)SO_(4)//Hg^(2+), Y=PCl_(5)//H_(2)O, Z=K_(2)Cr_(2)O_(7)//OH^(-)`D. `X=H_(2)SO_(4)//Hg^(2+),Y=CH_(3)MgBr//H_(2)O, Z=K_(2)CrO_(7)//H^(+)` |
| Answer» Correct Answer - D | |
| 358. |
Find out A, B, C , D in following reaction `(1) CH_(3) - CH = CH - CHO overset(A) to CH_(3) - CH = CH - COOH` (2) `CH_(3) - CH = CH - CHO overset(B) to CH_(3) - CH = CH - CH_(2) - OH` (3) `R - COOH overset(C) to R - CH_(2) - OH` (4) `R - COCl overset(D) to R - CHO`A. `{:(1= h_(2) .Pf.BaSO_(4),2= "Ammoniacal "AgNO_(3)),(3= LiAlH_(4),4=LiAlH_(4)):}`B. `{:(1=LiAlH_(4),2= LiAlH_(4)),(3=H_(2).Pd.BaSO_(4),4="Ammoniacal "AgNO_(3)):}`C. `{:(1="Ammoniacal "AgNO_(3),2=LiAlH_(4)),(3=LiAlH_(4),4=H_(2)Pd +BaSO_(4)):}`D. `{:(1=LiAlH_(4),2=LiAlH_(4)),(3="Ammoniacal" AgNO_(3),4=H_(2)Pd+BaSO_(4)):}` |
| Answer» Correct Answer - C | |
| 359. |
When of the following compounds would have the smallest value of `pK_(a)`?A. benzoyl chlorideB. o-chlorobenzoic acidC. p-chlorobenzoic acidD. benzyl chloride |
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Answer» Correct Answer - A It gives bezoyl chloride `(C_(6)H_(5)COOCl)`. `C_(6)H_(6)COOH+PCl_(5) overset(100^(@)C) to underset("Benzoyl chloride")(C_(6)H_(5)COCl)+POCl_(3)+HCl` |
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| 360. |
Identify (X), (Y) and (Z) in the given reaction. `X +Y overset(Z) to underset("3-Hydroxybutanal")(CH_(3)-overset(OH)overset(|)(CH)-CH_(2))-CHO`A. `{:(X,Y,Z),(HCHO,CH_(3)CHO,KOH):}`B. `{:(X,Y,Z),(CH_(3)CHO,CH_(3)CHO,NaOH):}`C. `{:(X,Y,Z),(CH_(3)CH_(2)OH,HCHO,H_(2)SO_(4)):}`D. `{:(X,Y,Z),(CH_(3)CH_(2)CHO,HCHO,"Dry ether"):}` |
| Answer» Correct Answer - B | |
| 361. |
The IUPAC name of following structure is `CH_(3) - overset(CH_(3)) overset(|)(CH)-underset(O)underset(||)C-CH_(2)-CH_(2)OH`A. 1-Hydroxy-4-methylpentan-3-oneB. 2-Methyl-5-hydroxy-3-pentanoneC. 4-Methyl-3-oxo-1-pentanolD. Hexanol-1-one-3 |
| Answer» Correct Answer - A | |
| 362. |
Which of the following compounds would have the smallest value of `pK_(a)`?A. `CHF_(2)CH_(2)CH_(2)COOH`B. `CH_(3)CH_(2)CF_(2)COOH`C. `CH_(2)FCHFCH_(2)COOH`D. `CH_(3)CF_(2)CH_(2)COOH` |
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Answer» Correct Answer - B Out of all alternates `pK_(4)` is smallest fo `CH_(3)CH_(2)CF_(2)COOH` (as electronegative group is very near to `-COOH` group) |
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| 363. |
Which of the following will not undergo aldol condensation-A. AcetaldehydeB. PropanaldehydeC. BenzaldehydeD. Trideuteroacetaldehyde |
| Answer» Correct Answer - C | |
| 364. |
The Hell-Volhard-Zelinsky reaction is used for preparingA. `beta`-halo acidB. `lamda`-halo acidC. `alpha`- halo acidD. acid halide |
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Answer» Correct Answer - C The hell-volhard-Zelinsky reaction is used for preparing `alpha`- haloacid. `CH_(2)-CH_(2)-COOH- overset(Cl_(2)//P) underset(-HCl)to underset(alpha "chloropropanoic acid")underset(Cl) underset(|)(CH_(3)-CH-COOH)` |
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| 365. |
In the following reaction, `R-CH_(2)overset(Br_(2)//p)toXoverset("Excess" NH_(3))toY` the major amounts of X and Y are:A. `R CHBr CONH_(2), R CH(NH_(2)) COOH`B. `R CHBr CONH, R CH(NH_(2)) COOH`C. `R CH_(2)COBr, R CH_(2) COONH_(4)`D. `R CHBr COOH, R CH_(2) CONH_(2)` |
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Answer» Correct Answer - B When aan acid is heated with `Br_(2)` in the presence P, `alpha`- H atom of the acid is replaced by bromine atom. This reaction is called Hell- Volhard-Zelinsky reaction. `NH_(2)^(-)` is a better nucleophile than `Br^(-)` `RCH_(2)COOH overset(Br_(2)//P) underset("HVZ reaction")to underset((X)) underset(Br)underset(|)(R-CH-COOH) overset("Excess") to underset((Y)) underset(NH_(2)) underset(|) (R-CH-COOH)` |
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| 366. |
The final product of the following sequence of reactinon is `(CH_(2))=(CH_(2))overset(Br_(2)) underset(C Cl_(4)) to A overset(KCN) to B overset(H^(+)//H_(2)O)toC`A. `underset(CH_(2)-COOH) overset(CH_(2)-COOH)|`B. `underset(CH_(2)-Br) overset(CH_(2)-Br)|`C. `underset(CH_(2)-CN) overset(CH_(2)-COOH)|`D. `underset(CH_(2)-CN) overset(CH_(2)-CN)|` |
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Answer» Correct Answer - A `overset(CH_(2)) underset(CH_(2))(||) overset(Br) underset(C Cl)to overset(CH_(2)Br) underset((A)) underset(CH_(2)Br)|overset(KCN) underset(-2KBr)to overset(CH_(2)CN) underset(CH_(2)CN)|overset(H^(+)) underset(H_(2)O)to overset(CH_(2)COOH) underset("Succinic acid")|` |
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| 367. |
The product formed when HCHO is heated with conc. KOHA. `CH_(3)CHO`B. `CH_(3)OH`C. `C_(2)H_(2)`D. `CH_(4)` |
| Answer» Correct Answer - B | |
| 368. |
Which of the following compounds do not undergo aldol condensation?A. AcetaldehydeB. PropanalC. Ethyl methyl ketoneD. Benzaldehyde |
| Answer» Correct Answer - D | |
| 369. |
`2C_(6)H_(5)CHO overset(NaOH) to C_(6)H_(5)CH_(2)OH + C_(6)H_(5)COONa` The similar reaction can take place with which of the following aldehyde?A. `CH_(3)CHO`B. `CH_(3)CH_(2)CHO`C. `(CH_(3))_(2)(C)CHO`D. `CH_(3)CH_(2)CH_(2)CHO` |
| Answer» Correct Answer - C | |
| 370. |
Complete the following reaction `RCOOHunderset(Delta)overset(P_(2)O_(5))to`A. acid anhydrideB. ketoneC. adehydeD. ester |
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Answer» Correct Answer - A `P_(2) O_(5)` is dehydrationg agent. hence acid gives anhydrids on dehydration by `P_(2)O_(5)` `2RCOOH overset(P_(2)O_(5)) to (RCO)_(2)` |
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| 371. |
Complete the missing lnks (X), (Y) and (Z) by making an appropriate choice. `CH_(3)COOH overset(PBr_(3)//Br_(2))toXoverset(KCN)toYoverset(H_(3)O^(+))toZ`A. `{:(" X"," Y"," Z"),(CH_(3)COBr,CH_(3)COCN,CH_(3)COOH):}`B. `{:(" X"," Y"," Z"),(BrCH_(2)COOH,underset(CN)underset(|)CH_(2)COOH,HOOC-CH_(2)COOH):}`C. `{:(" X"," Y"," Z"),(BrCH_(2)COOH,CH_(2)(CN)COOH,overset(" COOH")underset(" COOH")("|")):}`D. `{:(" X"," Y"," Z"),(Br_(2)CHCOOH,Br_(2)C(CN)COOH,CH_(3)CH_(2)COOH):}` |
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Answer» Correct Answer - B `underset(" "underset((Z))(HOOC-CH_(2)COOH)overset(H_(3)O^(+))larrunderset((Y))underset(CN)underset(|)(CH_(2))COOH)(CH_(3)COOHoverset(PBr_(3)//Br_(2))toBr-underset((X))(CH_(2))underset(darr overset(" ")underset(" ")KCN)(COOH))` |
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| 372. |
1-propanol is obtained from `C_(2)H_(5)` MgI and what ?A. `CH_(3)CHO`B. `HCHO`C. `HCN`D. `C_(2)H_(5)CHO` |
| Answer» Correct Answer - B | |
| 373. |
Product of the following reaction is `CH_(3) COCH_(3) overset([O]) to A overset(PCl_(3)) to B overset(CH_(3)COONa) to C`A. acetic unhydrideB. propanoic unhydrideC. ethyl propanoateD. isopropyl alcohol |
| Answer» Correct Answer - A | |
| 374. |
Treatment of propionaldehyde with dil NaOH solution givesA. `CH_(3)CH_(2)COOCH_(2)C_(2)H_(5)`B. `CH_(3)CH_(2)CHOHCH_(2)CH_(2)CHO`C. `CH_(3)CH_(2)CH(OH)CH(CH_(3))CHO`D. `CH_(3)CH_(2)COCH_(2)CH_(2)CHO` |
| Answer» Correct Answer - C | |
| 375. |
What are the product in the following reaction ? `CH_(3) - overset(CH_(3)) overset(|) (C) = CH_(2) underset(dil.H_(2)SO_(4)) overset(K_(2)Cr_(2)O_(7)+) to `A. `CH_(3) - COCH_(3) " and " H- COOH`B. `CH_(3) - CH_(2) CHO " and " CO_(2)`C. `CH_(3) - COOH " and " H - COOH`D. `CH_(3) - CHO " and "H - COOH` |
| Answer» Correct Answer - A | |
| 376. |
IUPAC name of mesityl oxide isA. 4-methyl penta - 3 - noneB. 4-methylpente - 3- noneC. 4-methylphent -3-en -2- oneD. 4-methyl ent - 3-en - 1-one |
| Answer» Correct Answer - C | |
| 377. |
Mesityl oxide isA. ketoneB. aldehydeC. esterD. ethers |
| Answer» Correct Answer - A | |
| 378. |
Mesityl oxide is formed by the condensation ofA. acetaldehydeB. acetoneC. propanalD. formaldehyde |
| Answer» Correct Answer - B | |
| 379. |
Product of the reaction `underset(Delta) overset(KOH+KMnO_(4)) to `A. B. C. D. |
| Answer» Correct Answer - C | |
| 380. |
`C_(3)H_(6)O underset(Delta) overset(OH^(-)) to ` Mesityl oxide . The `C_(3)H_(6) O` isA. `CH_(3) - CH_(2) - CHO`B. `CH_(3) COOH_(3)`C. `CH_(2) = CH - CH_(2) - OH`D. `CH_(3) - underset(OH) underset(|)(C) = CH_(2)` |
| Answer» Correct Answer - B | |
| 381. |
In theA. `CH_(3)CN`B. `CH_(3)NC `C. `CH_(3)NH_(2)`D. `CH_(3)COOH` |
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Answer» Correct Answer - D `CH_(3)COOH+HNO_(2) overset(LiAlH_(4)) to CH_(3)COOH+H_(2)+N_(2)uarr` |
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| 382. |
What is the by product fomred in this reaction `R-CO overset(-)Ooverset(+)Na overset(NaOH.CaO) underset(Delta)toR-H+?`A. `NaCHO_(3)`B. `CO_(2)`C. `Na_(2)HCO_(3)`D. `Na_(2)CO_(3)` |
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Answer» Correct Answer - D Carboxylic acids lose carbon dioxide to form hydrocarbons when their sodium salts are heated with soda lim. The reaction known as decarboxylation. `R-CO overset(-) O overset(+)Na overset(NaOH and CaO) underset("heat")to RH+Na_(2)CO_(3)` |
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| 383. |
Which of the following order represent acidic strenght of (I) benzoic acid. (II) 4-nitrobenzoic acids. (III) 3,4- dinitro benzoic acid and (IV) 4-methoxy benzoic acid ?A. `I lt I lt III lt IV`B. `IV lt I lt II lt III`C. `II lt III lt I lt IV`D. `IV lt II lt III lt I` |
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Answer» Correct Answer - B Increasing order of acidic strength is 4-methoxy bezoic acid `lt` benzoic acid `lt` 4-nitrobenzoic acid `lt3,4`- dinitrobenzoic acid. |
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| 384. |
Arrange the following acids in the decreasing order of the acidic strenght.A. `H-=C-COOH`B. `C_(6)H_(5)COOH`C. `CH_(2)=CH-COOH`D. `CH_(3)COOH` |
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Answer» Correct Answer - A The acidic strenght decreases in the order `I gt II gt III gt IV` |
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| 385. |
The acidic nature of the carboxylic acids is due to:A. high degree of ionisation of carboxylic acidsB. greater reasonance stabilisation of the carboxylic acid over the carboxylate ionC. greater reasonance stabilisation of the carboxylatee ion over carboxylic acidD. solubility of carboxylic acids in water |
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Answer» Correct Answer - C The acidic nature of carboxylic acids is due to greater reasonacne stabilisatio of the carboxylate ion over carboxylic acid. |
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| 386. |
Which of the following orders is not correct for the decreasing order of acidic character ?A. `CH_(3)CH_(2)CH(Cl)COOH gt CH_(3)CH(Cl)CH_(2)COOH gt CH_(2)(Cl)CH_(2)CH_(2)COOH gt CH_(3) CH_(2)CH_(2)COOH`B. `ICH_(2)COOH gt BrCH_(2)COOH gt ClCH_(2)COOH bt FCH_(2)COOH`C. `C Cl_(3)COOH gt CHCl_(2)COOH gt CH_(2)ClCOOH gt CH_(3)COOH`D. `HCOOH gt CH_(3)COOH gt C_(2)H_(5)COOH gt (CH_(3))_(2)CHCOOH` |
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Answer» Correct Answer - B The correct order of acidity is `ICH_(2)COOH lt BrCH_(2)COOH lt ClCH_(2)COOH lt FCH_(2)COOH` |
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| 387. |
The correct order of increasing acidic strength is _____.A. phenol lt ethanol lt ethanol lt chloroacetic acid lt acetic acidB. ethanol lt phenol lt chloroacetic acid lt acetic acidC. ethanol lt phenol lt acetic acid lt chloroacetic acidD. chloroacetic acid lt acetic lt phenol lt ethanol |
| Answer» Correct Answer - C | |
| 388. |
The correct order of acidic strength of carboxylic acid isA. Formic acid `lt` Benzoic acid `lt` Acetic acidB. Formic acid `lt` Acetic Acid `lt` Benzoic acidC. Acetic acid `lt` Formic acid `lt `Benzoic acidD. Acetic acid `lt` Benzoic acid `lt` Formic acid |
| Answer» Correct Answer - D | |
| 389. |
Which one of the following orders of acidic strength is correct?A. `RCOOH gt HC -= CH gt HOH gt ROH`B. `RCOOH gt ROH gt HOH gt HC -= CH`C. `RCOOH gt HOH gt HC -= CH gt ROH`D. `RCOOH gt HC -= CH gt HOH gt ROH` |
| Answer» Correct Answer - C | |
| 390. |
`CH_(3)COOH overset (Delta) underset (P_(2)O_(5)) to X.` Identify `X`A. `CH_(3)COCH_(3)`B. `CH_(3)CHO`C. `(CH_(3)CO)_(2)O`D. `CH_(4)` |
| Answer» Correct Answer - C | |
| 391. |
Ethyl cyanide is reduced by di-isobutyl aluminium hydride givesA. propanalB. propanoic acidC. propan - 1- amineD. propane |
| Answer» Correct Answer - A | |
| 392. |
Acetaldehyde reacts with `NH_(2)OH` to giveA. acetal amineB. acetal oxideC. acetaldoximeD. amino acetal |
| Answer» Correct Answer - C | |
| 393. |
The product of following reaction is `C_(2)H_(5) COOCH_(3) overset(("iso - but")_(2)Al-H)to?`A. `CH_(3) - CHO`B. `C_(2)H_(5)CHO`C. `CH_(3)- overset(O)overset(||)(C) - C_(2)H_(5)`D. `C_(2)H_(5) - COOH` |
| Answer» Correct Answer - B | |
| 394. |
2-bromopropanoic acid when heated with alcoholic KCN gives and organic compounds which on futher acid hydrolysis gives the compounds A, hence A will beA. `underset(OH) underset(|)(CH_(3)-CH-COOH)`B. `underset(CH_(2)NH_(2)) underset(|)(CH_(3)-CH-COOH)`C. `underset(NH_(2)) underset(|)(CH_(3)-CH-COOH)`D. `CH_(3)-CH(COOH)_(2)` |
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Answer» Correct Answer - D `underset(2-"bromopropanoic acid") underset(Br) underset(|)(CH_(3)-CH-COOH)overset((alc)KCN) to underset(2-"cyanopropanic acid") underset(CN) underset(|)(CH_(3)-CH-COOH)overset(H_(3)O^(+)) to underset(A) underset(COOH) underset(|)(CH_(3)-CHOOPH)` |
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| 395. |
Acetaldehyde isA. oxidising agnetB. reducing agentC. both oxidising and reducing agentD. none of these |
| Answer» Correct Answer - C | |
| 396. |
Compound A is reacted with KCN and followed by reduction using `SnCl_(2) + HCl` and successive hydrolysis gives propanal. The compound A isA. `C_(2)H_(5) - X`B. `C_(2)H_(5) - OH`C. `CH_(3)-CH_(2) - CH_(2) - X`D. `C_(2)H_(5) - CN` |
| Answer» Correct Answer - A | |
| 397. |
`R-CNunderset(HCl)overset(SnCl_(2))(to)" "overset(H_(3)O^(o+))(to)R-CHO` Above reaction isA. Etard reactionB. Stephen reactionC. Hell-Volharx-Zelinsky reactionD. Batz-chiemann reaction |
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Answer» Correct Answer - B When alkyl or aryl cyanide undergoes reduction in the presence of `SnCl_(2)//dil.` HCl followed by hydrolysis. Aldehyde is formed. This reaction is known as Stepehen reaction. `underset("Alkyl or aryl cyanide")(R-C-=N) overset(SnCl_(2)//H_(2)O) to underset("Aldehyde")underset(H)underset(|)underset(R-Coverset(*)=O+NH_(4)Cl+H_(2)O) underset(darr""^("Hydrolysis"))underset("Imino chloride") underset(H) underset(|)(C)= underset(H) underset(|)N:HCl` |
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| 398. |
Formonitrile is reduced by `SnCl_(2) + HCl` and product on acid hydrolysis givesA. formic acidB. methanalC. acetic acidD. acetone |
| Answer» Correct Answer - B | |
| 399. |
Cyclohexanoyl chloride on reduction by poisoned catalyst givesA. benzaldehydeB. cyclohexanolC. cyclohexanoneD. cyclohexyl methanal |
| Answer» Correct Answer - D | |
| 400. |
Which poison the catalyst (Pd) at aldehyde stage in the reduction of acyl halideA. PCCB. `BaSO_(4)`C. `SnCl_(2)`D. `CuSO_(4)` |
| Answer» Correct Answer - B | |