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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.
| 251. |
Identify the major product of following reaction : A. B. C. D. |
| Answer» Correct Answer - C | |
| 252. |
Which of these pair of reactants compound may be used to make this given acetal ? A. B. C. D. |
| Answer» Correct Answer - A | |
| 253. |
Statement -I: The acetal formation with ketones does not respond to base catalysis . Statement-II The dehydration step has to be acid catalysed.A. Both the statements are true and statement- II is the correct explanation of statement -I.B. Both statements are true but statement -II is not the correct explanation of statement -I.C. Statement-I is true but statement -II is falsaeD. Statement -I is false but statement- II is true |
| Answer» Correct Answer - 1 | |
| 254. |
The base catalysed reaction of 1,2-diketone to a salt of 2-hydroxy carbonxylic acid is known as benzile acid rearrangement . The reaction is not application to 1,2-diketones containing `alpha-` methylene group because of competing aldol condensation . A. B. C. D. |
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Answer» Correct Answer - C |
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| 255. |
The base catalysed addition of a compound having active methylene group (or relatively acidic hydrogen) to activate alkene is known as Michael addition reaction. B. C. D. None of these |
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Answer» Correct Answer - A |
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| 256. |
The base catalysed addition of a compound having active methylene group (or relatively acidic hydrogen) to activate alkene is known as Michael addition reaction. B. C. D. None of these |
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Answer» Correct Answer - C |
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| 257. |
`CH_(3)CHO+NH_(2)OHto CH_(3)CH=N-OH` The above reaction is carried out atA. `pH = 1`B. `pH = 4.5`C. `pH = 12`D. `pH = 14` |
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Answer» Correct Answer - (B) More Basic condititions: `OH^(-)` may attack `CH_(3)CHO` More Acidic conditions : `H^(+)` may attack `NH_(2)-OH` |
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| 258. |
Which of the following are examples of aldol condensation ? 1.`2CH_(3)CHOoverset(dil. NaOH)to CH_(3)CHOHCH_(2)CHO` . `2CH_(3)COCH_(3)overset(dil. NaOH)to CH_(3)COCH(CH_(3))CH_(2)COCH_(3)` 3. `2HCHOoverset(dil. NaOH)to CH_(3)OH+HCOOH` 4. `C_(6)H_(5)CHO+HCHOoverset(dil. NaOH)toC_(6)H_(5)CH_(2)OH`A. 2,3B. 1 , 3C. 1 , 2D. 1,2,3 |
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Answer» Correct Answer - ( C) 1,2 are aldol condensation due to presence of alpha hydrogen. |
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| 259. |
Which of the following will not undergo aldol condensation reaction ?A. `ClCH_(2)CHO`B. `C Cl_(3)CHO`C. `C_(6)H_(5)CH_(2)CHO`D. `CH_(3)CHO` |
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Answer» Correct Answer - 2 No `alpha` - hydrogen atoms |
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| 260. |
Which of the following will not undergo aldol condensation reaction ?A. `CH_(3)CHO`B. `CH_(3)CH_(2)CHO`C. `CD_(3)CHO`D. PhCHO |
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Answer» Correct Answer - D `alpha`-hydrogen absent |
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| 261. |
Which of the following will undergo aldol condensation ?A. B. C. D. |
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Answer» Correct Answer - A::B::D |
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| 262. |
Among the following compounds , the one which can undergo both aldol condensation and Cannizzaro reaction is :A. `(CH_(3))_(2)CHCHO`B. HCHOC. `C_(6)H_(5)CHO`D. `CH_(3)CHO` |
| Answer» Correct Answer - A | |
| 263. |
Oxidation of toluene with `CrO_(3)` in presence of `(CH_(3)CO)_(2)O` gives a product (A) which on hydrolysis forms Benzaldehyde. A is ___A. Chromoum complexB. Benzlidene diacetateC. BenzophenoneD. Benzal chloride |
| Answer» Correct Answer - 2 | |
| 264. |
Mark out the correct order of dipole moment for the following compounds : `H-underset("I")overset(O)overset(||)C-H" " H_(3)C-underset("II")overset(O)overset(||)C-H" "H_(3)C-underset("III")overset(O)overset(||)C-CH_(3)`A. `I gt II gt III`B. `II gt III gt I`C. `III gt II gt I`D. `III gt I gt II` |
| Answer» Correct Answer - C | |
| 265. |
Arrange these compounds in decreasing order of reactivity for the nucleophilic addition reaction.A. ` I gt II gt III gt IV`B. `IV gt III gt II gt I`C. `III gt II gt I gt IV`D. `I gt IV gt II gt III` |
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Answer» Correct Answer - a |
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| 266. |
Arrange the following compounds in decreasing order of nucleophilic addition reaction : A. `II gt IV gt III gt I`B. `I gt II gt III gt IV`C. `IV gt III gt II gt I`D. `II gt III gt IV gt I` |
| Answer» Correct Answer - B | |
| 267. |
Arrange the stability of given gemdiols is decreasing order : A. `III gt II gt I`B. `I gt II gt III`C. `III gt I gt II`D. `II gt III gt I` |
| Answer» Correct Answer - B | |
| 268. |
[X], product (X) in this reaction isA. B. C. D. |
| Answer» Correct Answer - A | |
| 269. |
Which of the following reactant will give the same product as (III) ,(ii),(Q) with NaOI ?A. B. `CH_(3)-overset(O)overset(||)(C)-Ooverset(O)overset(||)(C)-CH_(3)`C. `CH_(3)O-overset(O)overset(||)(C)-CH_(2)overset(O)overset(||)(C)-OCH_(3)`D. `CH_3-CH_(2)overset(O)overset(||)(C)-CH_(3)` |
| Answer» Correct Answer - D | |
| 270. |
In the given reaction `{:(" "CH_(3)),(" |"),(H_(3)C-C-C-CHO),(" | ||"),(" "H_(3)C " "O):} overset("(i)Conc. NaOH")underset((ii)H^(+)) to` product isA. `{:(" "H),(" |"),(H_(3)C-C-C-CH_2-OH),(" | ||"),(" "H_(3)C " "O):}`B. `{:(" "CH_(3)),(" |"),(H_(3)C-C-CH-COOH),(" | |"),(" "H_(3)C " "OH):}`C. `{:(" "CH_(3)),(" |"),(H_(3)C-C-C-COOH),(" | ||"),(" "H_(3)C " "OH):}`D. `{:(" "CH_(3)" "OH),(" | |"),(H_(3)C-C-C-CH_2),(" | ||"),(" "H_(3)C " "OH):}` |
| Answer» Correct Answer - B | |
| 271. |
4-Hydroxy-4-methylpentanal on heating with excess of methanol in the presence of an acid catalyst followed by dehydration of the products givesA. B. C. D. |
| Answer» Correct Answer - B | |
| 272. |
Compounds P and R upon ozonolysis produce Q and S, respectively. The molecular formula of Q and S is `C_(8)H_(8)O`. Q undergoes cannizzaro reactions but not haloform reaction. Whereas S undergoes haloform reactions but not cannizzaro reactions. (i) P `overset((i) O_(3)//CH_(2)Cl_(2))underset((ii)Zn//H_(2)O)tounderset((C_(8)H_(8)O))(Q) " " (ii) R overset((i) O_(3)//CH_(2)Cl_(2))underset((ii) Zn//H_2O)tounderset((C_(8)H_(8)O))(S)` The option (s) with suitable combination of P and R , respectively is (are)A. B. C. D. |
| Answer» Correct Answer - C::D | |
| 273. |
`CH_(3)CH_(2)CH(OH)CH(CH_(3))_(2)+CH_(3)COCI overset("base")rarr CH_(3)CH_(2)CH(OCOCH_(3))CH(CH_(3))_(2)+HCI` In the above reaction, if the reactant alcohol is a pure R-isomer the product would.A. Have configuration inverted at the chiral atomB. be a racemic mixtureC. have the same configuration at the chiral atomD. be optically inactive |
| Answer» Correct Answer - C | |
| 274. |
End product of the following reaction is `CH_(3)CH_(2)COOH overset(Cl_(2))underset(red P)to overset("alcoholic KOH")to`A. `CH_(3)underset(OH)underset(|)(C)HCOOH`B. `underset(OH)underset(|)(C)H_(2)CH_(2)COOH`C. `CH_(2)=CHCOOH`D. `underset(Cl)underset(|)(C)H_(2)underset(OH)underset(|)(C)HCOOH` |
| Answer» Correct Answer - C | |
| 275. |
Glyoxal (CHOCHO) on being heated with concentrated NaOH forms |
| Answer» Correct Answer - `HO-CH_(2)-COONa` | |
| 276. |
The product P of the following reaction is `CH_(3)-COOH overset(LiAlH_(4))to overset(SOCl_(2))to overset(Koverset(14)(C)N)to overset(H_(3)O^(o+)) to P` |
| Answer» Correct Answer - `CH_(3)-CH_(2)-overset(14)(C)OOH` | |
| 277. |
In which of the following reactions correct major product is mentioned ?A. B. C. D. |
| Answer» Correct Answer - A::B::C::D | |
| 278. |
`CH_(3)overset(O)overset(||)(C)CH_(2) overset(CH_(3))overset(|)underset(CH_(3))underset(|)(C)CHO overset(KOH,H_(2)O)underset(Delta)to` product `(C_(7)H_(10)O)` :A. B. C. D. |
| Answer» Correct Answer - C | |
| 279. |
Products A of the above reactions isA. `Ph-NH_(2)`B. `Ph-CH_(2)-NH_2`C. `Ph-CH_2-NH-CO_(2)H`D. `Ph-CH_(2)-NH-CHO` |
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Answer» Correct Answer - B Its Gabriel phthalimide reaction. |
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| 280. |
How many of the following will give 2,4-DNP test. `1.CH_(3)CH=O " " (2) CH_(3)-overset(O)overset(||)(C)-CH_3 " " (3) Ph-CH=O " " (4) Ph-overset(O)overset(||)(C)-CH_(3)` Glucose (Aldose) (6) Fructose (Ketose) (7) HCOOH (8) Ph-NH-OH |
| Answer» Correct Answer - A::B::C::D | |
| 281. |
In the reaction sequence `CH_(3)-overset(O)overset(||)(C)-H-underset(.^(Θ)OH)overset(HCN)rarr(A) underset(Delta)overset(H_(2)O //overset(o+)(H))rarr` Product is/are :A. DiasteromersB. Racemic mixture of hydroxy acidC. Product is racemic mixture of cyanohydrinD. Products is optically inactive |
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Answer» Correct Answer - B `CH_(3)-overset(O)overset(||)(C)-H overset(HCN)underset(.^(Theta)OH)to underset("Cyanohydrin dl mixture")(CH_(3)-overset(OH)overset(|)underset(H)underset(|)(.^(**)(C))-CN) overset(H_(3)overset(o+)(O))underset(Delta)to underset("dl mixture")(CH_(3)-overset(OH)overset(|)underset(H)underset(|)(C)-COOH)` |
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| 282. |
Write the product of following reactions `(a) CH_3-CH_(2)-OH overset(I_(2)//KOH)to "" Ph-CH_(2)-CO-CH_(3)overset(I_(2)//KOH)to` (c) CH_(3)-underset(OH)underset(|)(CH)-Ph overset(I_(2)//KOH)to` |
| Answer» Correct Answer - (a)`CHI_(3)+HCOO^(Theta)K^(o+) " " (b) CHI_(3)+PhCH_(2)COO^(Theta)K^(o+) " " (c) CHI_(3)+Ph-COOK` | |
| 283. |
In the following reaction final product is : `C_(6)H_(5)MgBr +CO_(2) overset("Ether")to overset(H^(o+))to` find productA. Benzoic acidB. BenzaldehydeC. BenzamideD. Benzene |
| Answer» Correct Answer - A | |
| 284. |
Observe the following reaction `CH_(3)-underset(O)underset(||)(C)-CH_(2)-underset(O)underset(||)(C) -CH_3 overset(HCN "(excess)")to overset(H_(3)overset(o+)(O)//Delta)to` products . The correct statements isA. the products is a mixture of two compoundsB. the product is optically inactiveC. the product is a mixture of two chiral and one achiral stereoisomerD. The product is a mixture of three stereoisomers. |
| Answer» Correct Answer - B::C::D | |
| 285. |
Observe the following sequence of reaction and answer the questions based on it. Phenylacetylene `overset(CH_(3)MgBr)underset(-CH_(4))to x overset((i)CO_(2))underset((ii)H^(o+))to y overset(H_(2)O //H_(2)SO_(4))underset(HgSO_(4))to z overset(Delta)to w` Compound z isA. `Ph-CH_(2)-overset(O)overset(||)(C)-COOH`B. C. `Ph-overset(O)overset(||)(C)-CH_(2)-COOH`D. `Ph-CH_(2)-COOH` |
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Answer» Correct Answer - C Z is `Ph-overset(O)overset(||)(C)-CH_(2)-COOH` |
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| 286. |
Observe the esterification mechanisms for primary and teriary alcohols. (+) Octan -2-ol esterifies with Acetic acid to give optically inactive racemised product. It must have gone byA. Type I mechanismB. Type II mechanismC. Mix type I and type II mechanismD. more by type I and less by type II mechanism |
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Answer» Correct Answer - B Since (+) Octan -2-ol racemises on reaction with acetic acid, therefore it must have gone through an `S_(N)1` reaction i.e., type II reaction |
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| 287. |
A carbonyl compound reacts with hydrogen cyanide to form cyanohydrin which on hydrolysis forms a recemic mixrture of `alpha`-hydroxy acid. The carbonyl compound `D`.A. formaldehydeB. acetaldehydeC. acetoneD. diethyl ketone |
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Answer» Correct Answer - 2 `alpha` - hydroxy acid formed must be chiral as forms racemic mixture. Only acetaldehyde ayanohydrin forms acid with chiral carbon on hydrolysis |
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| 288. |
Carbonyl compound which contains `alpha-H` gives aldol condenation reaction in presence of alkaline medium. The reaction between two molecules of acetaldehyde take placeas follows in presence of base Intramolecular aldol condensation reaction is given byA. 2,5-diketoneB. 2,7-diketoneC. 2,6 and 2,8-diketoneD. All of these |
| Answer» Correct Answer - D | |
| 289. |
Identify the hydrocarbon which on ozonolysis gives :- (a) Only acetone (b) 1 equivalent of propanal + 1 equivalent of formaldehyde (c ) 1 equivalent of acetone + 1 equivalent of acetaldehydeA. `CH_(3)-CH=overset(CH_(3))overset(|)C-CH_(3)`B. `CH_(3)-CH=CH-CH_(2) -CH_(3)`C. `CH_(2)=CH-CH_(3)`D. `(CH_(3))_(2)C=C(CH_(3))_(2)` |
| Answer» Correct Answer - 1 | |
| 290. |
Arrange the following compound in an increasing order of their reactivity in nucleophilic addition reactions : ethanal propanal, butanone, propanone.A. III lt II lt I lt IVB. II lt I ltIII lt IVC. IV lt III lt II lt ID. I lt II lt III lt IV |
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Answer» Correct Answer - 3 Reactivity decreases size and number of groups around CO group increases |
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| 291. |
A substance `C_(4)H_(10)O` yields on oxidation a compound `C_(4)H_(8)O` which gives an oxime and a positive iodoform test. The original substance on treatment with conc. `H_(2)SO_(4)` gives `C_(4)H_(8)`, The structure of the compound isA. `CH_(3)CH_(2)CH_(2)CH_(2)OH`B. `CH_(3)CHOHCH_(2)CH_(3)`C. `(CH_(3))_(3)COH`D. `CH_(3)CH_(2)-O-CH_(2)CH_(3)` |
| Answer» Correct Answer - 2 | |
| 292. |
(A) Carbonyl compounds take part in nucleophilic addition reactions. (R) These reactions are initialed by nucleophilic attack at the electron deficient carbon atom.A. Both the statements are true and statement- II is the correct explanation of statement -I.B. Both statements are true but statement -II is not the correct explanation of statement -I.C. Statement-I is true but statement -II is falsaeD. Statement -I is false but statement- II is true |
| Answer» Correct Answer - 1 | |
| 293. |
Assertion (A) The `alpha`-hydrogen atom in carbonyl compounds is less acidic. Reason (R) The anion formed after the loss of `alpha`-hydrogen atom is resonance stabilised.A. Assertion and reason both are correct and reason is correct explanation of assertion.B. Assertion and reason both are wrong statements.C. Assertion is correct statement but reason is wrong statement.D. Assertion is wrong statemen but reason is wrong statement |
| Answer» Correct Answer - iv | |
| 294. |
Consider the following carbonyl compounds Which of the following is correct decreasing order of their dipole moment ?A. `P gt R gt Q gt S`B. `S gt R gt Q gt P`C. `S gt Q gt R gt P`D. `Q gt S gt R gt P` |
| Answer» Correct Answer - C | |
| 295. |
Assertion : Chloral hydrate is a stable compound. Reason : It is stable due to high molecualr mass.A. Both the statements are true and statement- II is the correct explanation of statement -I.B. Both statements are true but statement -II is not the correct explanation of statement -I.C. Statement-I is true but statement -II is falsaeD. Statement -I is false but statement- II is true |
| Answer» Correct Answer - 3 | |
| 296. |
(mixture of alkenes) `overset((i) O_(3))underset((ii) Zn//H_(2)O)to` (mixture of carbonyl compounds). The incorrect statement isA. Total five alknes are obtainedB. Total six different carbonyl compounds are obtained ozonolysis.C. All carbonyl compound can give aldol reaction when treated with dil KOHD. Only two carbonyl compounds give positive idoform test |
| Answer» Correct Answer - D | |
| 297. |
STATEMENT -I : 2- methyl propanal does not give iodoform test STATEMENT -2 : It does not have `alpha` - hydrogen .A. STATEMENT-1 is True, Statement -2 is True , Stament -2 is a correct explanation for Statement -I.B. STATEMENT-1 is True, Statement -2 is True , Stament -2 is a correct explanation for Statement -I.C. Statement -1 is True, Statement -2 is False.D. Statement - 1 and Statement -2 both are Fals |
| Answer» Correct Answer - C | |
| 298. |
STATEMENT -I : Low molecualr weight carbonyl compounds are more soloble in water then the corresponding alkanes STATEMENT -2 : H- bonding between carbonyl oxygen and water makes carbonyl compounds more water soluble then hydrocarbon .A. STATEMENT-1 is True, Statement -2 is True , Stament -2 is a correct explanation for Statement -I.B. STATEMENT-1 is True, Statement -2 is True , Stament -2 is a correct explanation for Statement -I.C. Statement -1 is True, Statement -2 is False.D. Statement - 1 and Statement -2 both are Fals |
| Answer» Correct Answer - A | |
| 299. |
STATEMENT -I : Acetophenone and benzophenone can be distinguished by iodoform test STATEMENT -2 : Acetophenone and benzophenone both are carbonyl compound.A. STATEMENT-1 is True, Statement -2 is True , Stament -2 is a correct explanation for Statement -I.B. STATEMENT-1 is True, Statement -2 is True , Stament -2 is a correct explanation for Statement -I.C. Statement -1 is True, Statement -2 is False.D. Statement - 1 and Statement -2 both are Fals |
| Answer» Correct Answer - B | |
| 300. |
When semicarbazide reacts with a ketone (or aldehyde) to form semicarbazone. Only one nitrogen atom of semicarbazide acts as a nucleophile and attack the carbonyl carbon of the ketone. The product fo the reaction consequently is `R_(2)C=N- NH-CONH_(2)` rather than `R_(2)C=NCONH-NH_2`. what factor account for the fact that two nitrogen atoms of semicarbazide are relatively non nucleophilic ? |
| Answer» Correct Answer - Two nitrogen atoms of semicarbazide that are adjacent to the (C=O) group have their lone pair present in conjuction so nucleophilicity decreases. | |