Explore topic-wise InterviewSolutions in .

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.

451.

Match the reagents in column I with products formed by reactions with acetone in column II and mark the appropriate choice. A. `(A) to (i) ,(B) to (ii), (C ) to (iii), (D) to (iv) `B. `(A) to (iv), (B) to (iii), (C ) to (ii) , (D ) to (i)`C. `(A) to (iii), (B) to (i), (C ) to (iv), (D ) to (ii)`D. `(A) to (ii), (B) to (iv), (C ) to (i), (D) to (iii)`

Answer» Correct Answer - C
Discussion
452.

The best method to purify impure acetone isA. `CH_(3)COCH_(3)+HCl to CH_(3) -overset(OH)overset(|)underset(Cl)underset(|)C-CH_(3) overset("heat")to CH_(3)COCH_(3)`B. `CH_(3)COCH_(3)+NaHSO_(3) to CH_(3)-overset(OH)overset(|)underset(CH_(3))underset(|)C-SO_(3)Na overset(Na_(2)CO_(3))to CH_(3)COCH_(3)`C. `CH_(3)COCH_(3)+HCNto CH_(3)-overset(OH)overset(|)underset(CN)underset(|)C-CH_(3) overset(HOH)toCH_(3)COCH_(3)`D. `CH_(3)COCH_(3)+H_(2)SO_(4) to CH_(3)-overset(OH)overset(|)underset(" OSO"_(3)H)underset(|)C-CH_(3) to overset("heat")to CH_(3)COCH_(3)`

Answer» Correct Answer - B
Discussion
453.

Assertion : `(CH_(3))_(3)C COOH` does not give HVZ reaction. Reason : `(CH_(3))_(3)C COOH` does not have `alpha`-hydrogen atom.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.

Answer» Correct Answer - A
Discussion
454.

Which is the correct method of synthesising acetamide from acetone?A. `CH_(3)COCH_(3) overset(Pd//BaSO_(4)) to CH_(3)CHO overset(NH_(3)) to CH_(3)CH_(2)NH_(2) overset(H_(2)O) to CH_(3)CONH_(2)`B. `CH_(3)COCH_(3) overset(I_(2))underset(NaOH) to CH_(3)COONaoverset(H^(+)) underset(NH_(3)) to CH_(3)COONH_(4) overset(Delta) to CH_(3)CONH_(2)`C. `CH_(3)COCH_(3) overset(CrO_(3)) to CH_(3)COOH overset(NH_(3)) to CH_(3)CONH_(2)`D. `CH_(3)CONH_(3) overset(I_(2)) underset(NaOH) to CH_(3)COOH overset(HCl) to CH_(3)COCl overset(NH_(3)) to CH_(3)CONH_(2)`

Answer» Correct Answer - B
Discussion
455.

Aldehyde with `NH_(2)NH_(2)` formsA. hydrazonesB. anilineC. nitrobenzeneD. None of these

Answer» Correct Answer - A
Aldehydes and ketones on reaction with `NH_(2)*NH_(2)` forms hydrazones.
`RCHO+H_(2)N*NH_(2) to R underset("Hydrazone")(CH=N*NH_(2)+H_(2)O)`
`RCO_(2)+H_(2)N*NH_(2) to R_(2) underset("Hydrazone")(CH=N*NH_(2)+H_(2)O)`
Discussion
456.

Reaction of formadehyde and ammonia givesA. hexamethylene tetramineB. bakeliteC. ureaD. triethylene tetramine

Answer» Correct Answer - A
`6HCHO+4NH_(3) to underset("Hexamethylene tetramine")((CH_(2))_(2)N_(4))+6H_(2)O`
Discussion
457.

Mixture of ethanal and propanal is subjected to aldol condensation , the product formed areA. 1B. 2C. 3D. 4

Answer» Correct Answer - D
Discussion
458.

Ethanal and propanone undergoes aldol condensation reaction inpresence of dilute alkali to formA. `CH_(3)C(OH)(CH_(3))CH_(2)CHO`B. `CH_(3)CH(OH) CH_(2)COCH_(3)`C. `CH_(3)COC(OH)(CH_(3))_(2)`D. `CH_(3)COCH(CH_(3))CH_(2)OH`

Answer» Correct Answer - B
When aldehydes condenses with ketone, produces four condensation products. It is the `alpha`- hydrogen atom of the ketone which is involved in the condensation reaction and produces major product.
`CH_(3)CHO + HCH_(2)COCH_(3) overset("dil.NaOH") to underset(" 4- hydroxy 2- pentanone")(CH_(3)CH(OH) CH_(2)COCH_(3))`
Discussion
459.

Statement -1: Acetophenone gives aldol condensation. Statement-2: Benzaldehyde is more reactive than acetaldehyde towards nucleophilic addition. Statement-3: Benzophenone has `alpha`-HydrogensA. TTTB. FFFC. TFFD. TFT

Answer» Correct Answer - C
Discussion
460.

2,2- diethoxy butane is obtained from ethanol and what ?A. `CH_(3) - CH_(2) - CH_(2) - CHO`B. `CH_(3) - CHCH_(2) - CH_(3)`C. `CH_(3) - underset(OH) underset(|) (CH) - CH _(2) - CH_(3)`D. `CH_(3) - CH_(2) - CH_(2) -CH_(2) - I`

Answer» Correct Answer - B
Discussion
461.

On reaction with ketone with hydroxyl amine give ketoxime which on reduction producesA. carboxylic acidB. `1^(@)` amineC. `2^(@)` - amineD. amide

Answer» Correct Answer - B
Discussion
462.

Which of the following reactions convert acetone into hydrocarbon having same number of carbon atoms?A. Wolff-Kishner reactionsB. Hofmann reactionC. Griganrd reactionD. Reduction with `LiAlH_(4)`

Answer» Correct Answer - A
`CH_(3)-overset(CH_(3))overset(|)C=O+H_(2)overset(-H_(2)O)to CH_(3)-overset(CH_(3))overset(|)C=N NH_(2)overset([OH])toCH_(3)-underset("Propane") underset(H) underset(|) overset(CH_(3)) overset(|)C-H`
Discussion
463.

Cannizaro reaction is preformed byA. formaldehydeB. formaldehyde and acetaldehydeC. benzaldehydeD. formaldehyde and benzaldehyde

Answer» Correct Answer - D
Cannizaro reaction is given by only those aldehydes and ketones in which `alpha`-H atom is absent.
Formaldehyde (HCHO) and benzaldehyde `(C_(6)H_(5)CHO)` both due to the abseence of `alpha`-H undrgo Cannizaro reaction.
Discussion
464.

The claisen schmidt condensation product of benzaldehyde and acetone isA. `C_(6)H_(5)CH=C(CH_(3))_(2)`B. `C_(6)H_(5)CH_(2)-overset(O)overset("||")C-CH=CH_(2)`C. `C_(6)H_(5)-overset(O)overset("||")C-CH=CH-CH_(3)`D. `C_(6)H_(5)-CH=CH-overset(O)overset("||")C-CH_(3)`

Answer» Correct Answer - D
`{:(C_(6)H_(5)CHO+CH_(3)COCH_(3) to C_(6)H_(5)-overset(OH)overset(|)(CH)-CH_(2)-overset(O)overset("||")C-CH_(3)),(" "overset(" ")underset(" ")Delta darr -H_(2)O),(" "C_(6)H_(5)-CH=CH-overset(O)overset("||")C-CH_(3)):}`
Discussion
465.

Aldehydes that do not undergo aldol condensation are (1) propanal (2) trichloroethanal (3) 2- phenylethanal (4) ethanal (5) benzaldehydeA. 3 and 4 onlyB. 2 and 5 onlyC. 1, 2 and 3 onlyD. 2, 3 and 5 only

Answer» Correct Answer - B
The carbonyl compound must contain an `alpha`-hydrogen atom, for it to undergo aldol condensation.
Discussion
466.

The compounds HCHO and `CH_(3) CHO` on intermolecular aldol condensation gives .A. `HO - CH_(2) - CH_(2) - CHO`B. `CH_(3) - CHOH - CH_(2)OH`C. `CH_(3) - CHOH - CH_(3)`D. `CH_(3) - CHOH - CH_(2) - CH_(2) OH`

Answer» Correct Answer - A
Discussion
467.

`CH_(3)CHO+HCHOoverset("dil. NaOH")underset("Heat")rarrAoverset("HCN)underset(H_(3)O^(+))rarrB` the structure of compound B isA. `CH_(2)=CH-underset(OH)underset(|)(CH)-COOH`B. `CH_(2)=CH-underset(CN)underset(|)(CH)-OH`C. `CH_(2)CH_(2)-underset(OH)underset(|)(CH)-COOH`D. `CH_(3)-underset(OH)underset(|)(CH)-COOH`

Answer» Correct Answer - A
`H-overset(O)overset(||)underset(H)underset(|)C+CH_(3)-overset(O)overset(||)C-Hoverset(Dil. NaOH)hArrH-overset(OH)overset(|)underset(H) underset(|)C-CH_(2)-CHO`
`overset(Delta)to CH_(2) underset(A)CH-CHO overset(HCN) underset(H_(3)O^(+))toCH_(2)= underset(B)(CH)- underset(H) underset(|)(CH)-COOH`
Discussion
468.

Study the following sequence of reaction and identify the product (Y). `CH_(3)CHO +HCHO overset("dil."NaOH)underset("heat") to X overset(HCN) underset(H_(3)O^(+)) to Y`A. `CH_(2)=CH-underset(OH)underset(|)(CH)-COOH`B. `CH_(3)-overset(CN)overset(|)underset(OH)underset(|)C-COOH`C. `CH_(3)CH_(2)-underset(OH) underset(|)CH-COOH`D. `CH_(2)=CH-underset(CN)underset(|)(CH)-COOH`

Answer» Correct Answer - A
`{:(H-overset(O)overset("||")C-H+HCH_(2)-CHOoverset("dil. " NaOH)underset("heat")to underset(OH)underset(|)(" CH"_(2))-overset(H)overset(|)CH-CHO),(" " darr overset(" ")underset(" ")-H_(2)O),(underset((Y))(CH_(2)=CH-underset(OH)underset(|)CH-COOH)overset(" HCN ")underset(H_(3)O)larrunderset((X))(CH_(2)=CH-CHO)):}`
Discussion
469.

Solid carbon dioxide when treated with etheral solution of C2H5MgBr followed by acid hydrolyzis gives :(a) propanoic acid(b) ethanoic acid (c) propionic acid (d) both (a) and (c)

Answer»

Option : (d) both (a) and (c)
Discussion
470.

IUPAC name of carboxylic acid isA. alkinoic acidB. alkanoic acidC. alkenoic acidD. alkyl alkanoate

Answer» Correct Answer - B
Discussion
471.

IUPAC name m-toluic acid isA. 3-methylbenzoic acidB. 2-methylbenzoic acidC. 4-methylbenzoic acidD. 2,4 - dimethylbenzoic acid

Answer» Correct Answer - A
Discussion
472.

`(CH_(3))_(2)COoverset(NaCN)underset(HCI)rarr(A)underset(Delta)overset(H_(3)^(+)O)rarr(B)` In the above sequence of reactions, (A) and (B) are :A. `(CH_(3))_(2)C(OH)CH. (CH_(3))_(2)C(OH)COOH`B. `(CH_(3))_(2)C(OH)CNH_(2). (CH_(3))_(2)C(OH)_(2)`C. `(CH_(3))_(2)C(OH)CN.(CH_(3))_(2)CHCOOH`D. `(CH_(3))_(2)C(OH)CNH_(2).(CH_(3))_(2)C=0`

Answer» Correct Answer - A
Discussion
473.

The compound 'X' upon alkaline hydrolysis gives a product which reacts with phenylhydrazine but does not reduce ammoniacal silver nitrate solution. A possible structure for 'X' is :(a) CH3CHCl CH2Cl (b) CH3CCl2CH3 (c) CH3CH2CH2Cl (d) CH3CH2CHCl2

Answer»

Option : (b) CH3CCl2CH3
Discussion
474.

An aldehyde when warmed with Zn/Hg and cone. HCl gives :(a) alcohol (b) hydrocarbon (c) carboxylic acid (d) ketone

Answer»

Option : (b) hydrocarbon
Discussion
475.

Sodium borohydride does not reduce : (a) – COOH group (b) – NO2 group (c) – X atom (d) – CHO group

Answer»

Option : (a) – COOH group
Discussion
476.

An organic compound (A) C3H8O on oxidation gives (B) C3H6O2. The compound A may be :(a) an ester (b) an alcohol (c) an aldehyde (d) a ketone

Answer»

Option : (b) an alcohol
Discussion
477.

Arrange the following compounds in the increasing order of their boiling points: `CH_(3)CH_(2)CH_(2)CHO, CH_(3)CH_(2)CH_(2)CH_(2)OH, H_(5)C_(2)-O-C_(2)H_(5),CH_(3)CH_(2)CH_(2)CH_(3)`

Answer» The molecular masses of these compounds are in the range of 72 to 74. Since only butan-1-ol molecules are associated due to extensive intermolecular hydrogen bonding, therefore, the boiling point of butan-1-ol would be the highest. Butanal is more polar than ethoxyethane. Therefore, the intermolecular dipole-dipole attraction is stronger in the former. n-Pentane molecules have only weak vander Waals forces. Hence increasing order of boiling points of the given compounds is as follows:
`CH_(3)CH_(2)CH_(2)CH_(3)ltH_(5)C_(2)-O-C_(2)H_(5)ltCH_(3)CH_(2)CH_(2)CHOltCH_(3)CH_(2)CH_(2)CH_(2)OH`
Discussion
478.

Assertion: Acerylic acid `(CH_(2) - CHCOOH)` is a weaker acid than benzonic acid `(C_(6)H_(5)COOH)`. Reason : Ethylenic double bond is lessel electrondonating than benzene ring.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.

Answer» Correct Answer - C
Correct Reason : Ethylenic double bond is more electron donating than a benzene ring.
Discussion
479.

When m-chlorobenzaldehyde is treated with `50% KOH` solution, the product (s) obtained is (are)A. B. C. D.

Answer» Correct Answer - C
Discussion
480.

`C_(6)H_(5)-CH=CHCHO overset((X))rarr C_(6)H_(5)CH=CH_(2)OH` In the above sequence (X) can be:A. `H_(2)//Ni`B. `NaBH_(4)`C. `K_(2)Cr_(2)O_(7)//H^(+)`D. Both `(1)` and `(2)`

Answer» Correct Answer - 2
`NaBH_(4)` is mild reducing agent.
Discussion
481.

`2HCHOoverset(50% NaOH)rarr CH_(3)OH+HCOONa` This reaction is called `:`A. Aldol condensationB. Tischenko reactionC. Cannizaro reactionD. Reimer Tiemann reaction

Answer» Correct Answer - 3
Cannizaro reaction.
Discussion
482.

If `3-` hexanone is reacted with `NaBH_(4)` followed by hydrolysis with `D_(2)O` , the product will be `:`A. `CH_(3)-CH_(2)-underset(underset(OD)|)(C)H-CH_(2)-CH_(2)-CH_(3)`B. `CH_(3)-CH_(2)-underset(underset(OD)|)overset(overset(D)|)(C)-CH_(2)-CH_(3)`C. `CH_(3)-CH_(2)-underset(underset(OH)|)overset(overset(D)|)(C)-CH_(2)-CH_(2)-CH_(3)`D. `CH_(3)-CH_(2)-underset(underset(OH)|)(C)H-CH_(2)-CH_(2)-CH_(3)`

Answer» Correct Answer - 1
`CH_(3)-CH_(2)-underset(underset(O)(||))(C)-CH_(2)-CH_(2)-CH_(3)underset((ii)D_(2)O)overset((i)NaBH_(4))rarrCH_(3)CH_(2)-underset(underset(OD)|)(C)H-CH_(2)-CH_(2)-CH_(3)`
Discussion
483.

Arrange the following in the decreasing order of acidity.ClCH2COOH, Cl3 CCOOH, CH3COOH, Cl2 HCOOH

Answer»

Cl3CCOOH > Cl2CHCOOH > ClCH2COOH > CH3COOH
Discussion
484.

Arrange the following acids in order of their decreasing acidity.

Answer»

Acidity in the decreasing order.
Discussion
485.

Name the reagent you will use to bring about the following conversions(a) Ethane nitrite to ethanal(b) Alkyl alcohol to propanal(c) But- 2-ene to ethanal

Answer»

(a) (Disobutyl) aluminium hydride (DIBAL-H)

(b) Pyridinium chlorochromate (PCC)

(c) (i) O3/CCl4 (ii) ZnDust /H2O
Discussion
486.

IUPAC name of following compound is A. 4-methylcychlohexane 1- carboxylicacidB. 4- carboxyl - 1- methylcyclohexaneC. m - Toluic acidD. o-Toluic acid

Answer» Correct Answer - A
Discussion
487.

IUPAC name of isobutyraldehyde isA. 2-methylpropanoneB. 2-methylpropanalC. 2-methylpropanoneD. methylethanoate

Answer» Correct Answer - B
Discussion
488.

IUPAC name of `beta`- methyl butyric acid isA. 3-methylbutanoicacidB. 4- methylpentanoicacidC. 2-methylbutanoicacidD. 2-methylpropanoicacid

Answer» Correct Answer - A
Discussion
489.

IUPAC name of `beta`-methyl butyraldehy deA. 2-methyl butanalB. 3- methyl butanalC. 2- methyl propanalD. 3- methyl pentanal

Answer» Correct Answer - B
Discussion
490.

Glacial acetic acid at low temperature is aA. thin liquidB. viscous liquidC. ice like solidD. semi solid

Answer» Correct Answer - C
Discussion
491.

The reaction of RMgX with a ketone, followed by treatment with `H_(3)O^(+)` formsA. `1^(0)` alcoholB. `2^(0)` alcoholC. `3^(0)` alcoholD. alkane.

Answer» Correct Answer - C
`RCOR + RMgX underset(H_(3)O^(+)) overset("dry ether") to R_(3) C - OH + MgXOH`
Discussion
492.

When acetone reacts with `Ba(OH)_(2)` it givesA. acetoximeB. urotropineC. t-butyl alcohlD. diacetone alcohol

Answer» Correct Answer - D
Discussion
493.

`beta` - hydroxy butyraldehyde is an example ofA. aldolB. ketolC. esterD. alcohol

Answer» Correct Answer - A
Discussion
494.

The acid which reduces Fehling sodium isA. Methanoic acidB. Ethanoic acidC. Butanoic acidD. Propanoic acid

Answer» Correct Answer - D
Methanoic acid resembles with aldehyde due to its structure So, it reduces Fetling reagent. `underset("Aldehydic group")(H-overset(O)overset(||)(C)-OH)`
Discussion
495.

Union of two or more molecules of the sam or different compound with elimination of water to form a new substance is known asA. synthesisB. polymerisationC. condensationD. none of these

Answer» Correct Answer - C
Discussion
496.

Which of the following can be used to differentiate between acetaldehyde and propanal ?A. Ammonical `AgNO_(3)`B. `CuSO_(4) + Na -K` tartarate in NaOHC. `I_(2)` in the presence of baseD. Decolourised Fuchin

Answer» Correct Answer - C
Discussion
497.

Which is most difficult to oxidise ?A. HCHOB. `CH_(3)COCH_(3)`C. `CH_(3)CHO`D. `C_(2)H_(5)CHO`

Answer» Correct Answer - B
Discussion
498.

In esterification reaction concentrated `H_(2)SO_(4)` act asA. dehydrating agentB. catalystC. reducing agentD. oxidising agent

Answer» Correct Answer - A
Discussion
499.

Fehling solution isA. acidified `CuSO_(4)` solutionB. ammonical `AgNO_(3)` solutionC. copper sulphate, sodium hydroxide and Rochelle saltD. none of these

Answer» Correct Answer - C
Discussion
500.

Which does not react with Fehling solution ?A. EthanalB. GlucoseC. Formic acidD. Benzaldehyde

Answer» Correct Answer - D
Fehling solution is weak oxidising agent and benzaldehyde is weak reducing agnet. Hence, it does not react with Fehling solution . Formic acid, glucose, ethanal contains CHO - group.
Hence , they reduce Fehling solution.
Discussion