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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.
| 51. |
Which of the following dicarboxylic acid will give cycle alkanone on heating?A. B. C. D. |
| Answer» Correct Answer - A::B | |
| 52. |
Which of the following reagent react with `CH_(2)O` forming urotropine ?A. `NH_(2)OH`B. `NH_(3)`C. `HCN `D. `RMgX` |
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Answer» Correct Answer - B `6HCHO + 4NH_(3) to (CH_(2))_(6) N_94) + 6H_(2)O` |
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| 53. |
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 will not for cyclic anhydrides?A. B. C. D. |
| Answer» Correct Answer - C | |
| 54. |
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. Consider the following sequence of reaction, The final product of the reaction would beA. B. C. D. |
| Answer» Correct Answer - D | |
| 55. |
Acetyl chloride reacts with ammonia to give : (a) ammonium acetate (b) ethylammonium chloride (c) ethylamine (d) acetamide |
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Answer» Option : (d) acetamide |
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| 56. |
Margarine contains :(a) acetaldehyde (b) propionaldehyde (c) butyraldehyde (d) formaldehyde |
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Answer» Option : (c) butyraldehyde |
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| 57. |
Among the following which compound will react with `Na_(2)CO_(3)` solution to give sodium salt and `CO_(2)` ?A. PhenolB. 1- hexanolC. Formic acidD. Ethanal |
| Answer» Correct Answer - C | |
| 58. |
Acetaldehyde form a white crystalline precipitate mixing with a solution ofA. acidicB. alcoholic `,Na_(2)SO_(3)`C. saturated aqueous `NaHSO_(3)`D. aqeous. NaCl |
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Answer» Correct Answer - C `CH_(3)CHO+NaHSO_(3)to H_(3) underset(("white crystalline ppt")) underset(("Acetaldehyde sodium bisulphite")) underset(S overset(-)O_(3)overset(+)Na) underset(|) overset(OH) overset(|)(C-C-H)` |
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| 59. |
In the following reacton, product P is `R-overset(O)overset(||)C-Cloverset(H_(2))underset(Pd-BaSO_(4))rarrP`A. `RCH_(2)OH`B. RCOOHC. RCHOD. `RCH_(3)` |
| Answer» Correct Answer - C | |
| 60. |
An organic compound does not give a precipitate with 2,4 - DNP and does not react with sodium metal . It could beA. `CH_(3) - CH_(2) - CHO`B. `CH_(3) COCH_(3)`C. `CH_(3) - CHO`D. `CH_(3) OC_(2)H_(5)` |
| Answer» Correct Answer - D | |
| 61. |
In the following reacton, product P is `R-overset(O)overset(||)C-Cloverset(H_(2))underset(Pd-BaSO_(4))rarrP`A. RCHOB. `RCH_(3)`C. RCOOHD. `RCH_(2)OH` |
| Answer» Correct Answer - A | |
| 62. |
Hydrogenation of benzoyl chloride in the presence of Pd on `BaSO_(4)` givesA. benzyl alcoholB. benzoic acidC. benzaldehydeD. phenol |
| Answer» Correct Answer - C | |
| 63. |
Which of the following is acrolein ?A. `CH_(3) -CH =CH-CHO`B. `CH_(3) = CH - CHO`C. `CH_(2)=CH-CH_(2) -CHO`D. `CH_(2) =CH-CH_(2)-CH_(2)-CHO` |
| Answer» Correct Answer - B | |
| 64. |
Tautomer of ethyl methyl ketone isA. but -2- en -2-olB. but -2- en - 1- olC. but -2- en -1- oicD. prop -1- en -2- ol |
| Answer» Correct Answer - A | |
| 65. |
Acetic chloride cannot be obtained by treated acetic acid withA. `CHCl_(3)`B. `SOCl_(2)`C. `PCl_(3)`D. `PCl_(5)` |
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Answer» Correct Answer - A `CH_(3)COOH + CHCI_(3) rarr "No reaction"` |
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| 66. |
Acetic acid s weak acid than sulphuric acid becauseA. it decomposes on increasing tempratureB. it has less degree of ionisationC. it has `COOH` groupD. none of these |
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Answer» Correct Answer - B `CH_(3)COOH` is slightly ionised than `H_(2)SO_(4)` |
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| 67. |
Glacial acetic is obtained byA. Distilling vinegarB. Crystallizing, separating and melting acetic acidC. Treating vinegar with dehydrating agentD. Chemically separting acetic acid |
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Answer» Correct Answer - B Acetic acid freezes at `16.6 ^(@) C` while water freezes at `0^(@)C`. So glacial acetic acid is obtained by crystallizing, separating and melting acetic acid. |
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| 68. |
On mixiting ethyl acetate with aqueous sodium chloride, the composition of the resultant solution isA. `CH_(3)CI + C_(2)H_(5)COONa`B. `CH_(3)COONa + C_(2)H_(5)OH`C. `CH_(3)COCI + C_(2)H_(5)OH + NaOH`D. `CH_(3)COOC_(2)H_(5) + NaCI` |
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Answer» Correct Answer - D `CH_(3)COOC_(2)H_(5) + NaCI rarr `No reaction |
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| 69. |
Which si tribasic acidA. adipic acidB. succinic acidC. Tartaric acidD. citric acid |
| Answer» Correct Answer - D | |
| 70. |
Between `CH_(3) COOH " and " H - COOH`, the HCOOH will beA. less acidicB. more acidicC. equally acidicD. non - acidic |
| Answer» Correct Answer - B | |
| 71. |
What of the following is expected to be most highly ionised in water ?A. `CH_(2)CICH_(2)CH_(2)COOH`B. `CH_(3)CHCICH_(2)COOH`C. `CH_(3)CH_(2)C CI_(2)COOH`D. `CH_(3)CH_(2)CHCICOOH` |
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Answer» Correct Answer - C The most acidic compound is more ionized in `H_(O)`.also (c ) is the most acidic compound due to `(-1)` effect of `2CI on alpha- C`. |
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| 72. |
What of the following is expected to be most highly ionised in water ?A. `CH_(2) ClCH_(2) CH_(2) COOH`B. `CH_(3) CHClCH_(2) COOH`C. `CH_(3) CH_(2) C Cl_(2) COOH`D. `CH_(3) CH_(2) CHClCOOH` |
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Answer» Correct Answer - B `CH_(3) - CH_(2) - C CI_(2) - COOH alpha,alpha`-dichloro butanoic is most acidic. Henceit will easily loose `H^(+)` ions in solution. |
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| 73. |
Which one of the following would be expected to be most highly ionised in waterA. `Cl - CH_(2) - CH_(2) - CH_(2) - COOH`B. `CH_(3) CHClCH_(2) - COOH`C. `CH_(3) - CH_(2) - CHCl - COOH`D. `CH_(3) - CH_(2) - CH_(2) - COOH` |
| Answer» Correct Answer - C | |
| 74. |
In the following sequence of reaction `:` Product P and Q are respectively `:`A. `CH_(3)-underset(underset(CH_(2))|)(C)H-CH_(2)CHO " "&" "CH_(3)-overset(overset(Cl)|)(C)H-CH-underset(underset(Br)|)(C)HO`B. `CH_(3)-CH=CH-overset(overset(OH)|)(C)H-CH_(3)" "&" "CH_(3)-overset(overset(Br)|)(C)H-underset(underset(Cl)|)(C)H-CHO`C. `CH_(3)-underset(underset(CH_(3))|)(C)H_(2)-CHO" "&" "CH_(3)-overset(overset(Br)|)(C)H-underset(underset(Cl)|)(C)H-CHO`D. `CH_(3)-CH=CH-overset(overset(OH)|)(C)H-CH_(3)" "&" "CH_(3)-overset(overset(Cl)|)(C)H-underset(underset(Br)|)(C)H-CHO` |
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Answer» Correct Answer - 4 P is formed by `1,2` addition which is a nucleophilic addition while Q is formed by electrophilic addition to the `gt C=Clt` following a more stable intermediate. |
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| 75. |
Observe the following reaction `CH_(2)-underset(underset(O)(||))(C)-CH_(2)-underset(underset(O)(||))(C)-CH_(2)overset(HCN("excess"))rarroverset(H_(3)overset(o+)(O)//Delta)rarr `Products The correct statements `(s)` is `//` areA. The product is a mixture of two compoundsB. The product is optically activeC. The product is a mixture of two chiral and one achiral stereoisomersD. The product is a mixture of four stereoisomers. |
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Answer» Correct Answer - 3 `CH_(3)-underset(underset(O)(||))(C)-CH_(2)-underset(underset(O)(||))(C)-CH_(3)overset(HCN)rarrCH_(3)-underset(underset(CN)|)overset(overset(OH)|)(C)-CH_(2)-underset(underset(CN)|)overset(overset(OH)|)(C)-CH_(3)overset(H_(3)O^(o+))rarrCH_(5)-underset(underset(COOH)|)(C)(OH)-CH_(2)-underset(underset(COOH)|)(C)(OH)-CH_(3)` product has three steroisomers `rarrd+l+` meso and product mixture is optically inactive |
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| 76. |
The aqueous solution of `RCOOH` contains,A. `RCOO^(-) + H^(+)`B. `RCO^(+) + OH^(-)`C. `RCOO^(-) + H_(3)O^(+)`D. `RCOOH + RCOO^(-) + H_(3)O^(+)` |
| Answer» Correct Answer - D | |
| 77. |
Which is incorrect ?A. B. C. D. |
| Answer» Correct Answer - 2 | |
| 78. |
A new carbon-carbon bond formation is possible in:A. Cannizaro reactionB. Reimer- Tiemann reactionC. HVZ reactionD. Schmidt reaction |
| Answer» Correct Answer - 2 | |
| 79. |
Assertion: Lower aldehydes and ketonses are solutble in water but the solubility decreases as the molecular mass increase. Reason : Distinction between aldehydes and letones.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 - B Lower aldehydes and ketone are soluble in water due to polar effect of `gtC = O` which makes hydrogen bonds with water molecules. As the size of the aldehydes and ketones increase the hydrophobic part, i.e., alkyl Chain increases which weaknes the `H-bond` foemations with `H_(2)O` molecles and decreases the solubility. |
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| 80. |
Order of hydrolysis for the following is (I) `RCOCl" "(II) RCOOR` (III) `RCONH_(2)" " (IV) (RCO)_(2)O`A. `IgtIVgtIIgtIII`B. `IgtIIgtIIIgtIV`C. `IgtIIIgtIIgtIV`D. `IVgtIIIgtIIgtI` |
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Answer» Correct Answer - A Order of hydrolysis `prop` order of reactivity. |
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| 81. |
Order of hydrolysis for the following (I) `RCOCI" "(II) RCOOR` (III) `RCONH_(2)" " (IV) (RCO)_(2)R`A. I `gt` IV `gt` II `gt` IIIB. I `gt` II `gt` III `gt` IVC. I `gt` III `gt` II `gt` IVD. IV `gt` III `gt` II `gt` I |
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Answer» Correct Answer - A Of all the acid derivatives, acid chlorides i.e., `CH_(3)COCI` is most reactive. The order of reacitivity of acid derivatives decreased in the following order. `RCOCI gt (RCO)_(2)O gt RCOOR gt RCONH_(2)`. |
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| 82. |
Let's Practice Aldehydes, Ketones and Carboxylic Acids Class 12 Mock Test and Score high marks? |
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Answer» Try Aldehydes, Ketones and Carboxylic Acids Class 12 Mock Test. You can give multiple attempts and evaluate their performance to get good marks in actual exam. Practice more on a regular basis with these Class 12 Mock test of Aldehydes, Ketones and Carboxylic Acids to improve your subject knowledge & problem-solving skills along with time management. These tests are absolutely free and are based on the latest pattern. These Test of the Chapter Aldehydes, Ketones and Carboxylic Acid in this article. This is very important for all engineering entrance examinations. Mock test for important part of exams for class 12 exams and if practiced properly can help you to get higher marks. Mock Test for class 12 Aldehydes, Ketones and Carboxylic Acids make you feel confident in answering the question in the exam & increases your scores to high. You will discover the Mock test for class 12 Chemistry all Concepts as per the latest syllabus. Aldehydes, Ketones and Carboxylic Acids Class 12 Online Mock Test will help students of class 12 to prepare themselves for the board exams and competitive exams. That is why we have provided chapter-wise sets mock test of class 12 chemistry topics so that students can perform better for their exams. Click here for regular practice: - Class 12 The Aldehydes, Ketones and Carboxylic Acids Mock Test |
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| 83. |
The refluxing of `(CH_3)_2NCOCH_3` with acid givesA. `(CH_(3))_(2)NH+CH_(3)COOH`B. `(CH_(3))NCOOH+CH_(4)`C. `2CH_(3)OH+CH_(3)CONH_(2)`D. `2CH_(3)NH_(2)+CH_(3)COOH` |
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Answer» Correct Answer - A Strong acids have `pK_(a)` values `lt` 1, the acids with `pK_(a)` values between 1 and 5 are considered to be moderately strong acid , weak a acids have `pK_(a)` values between 5 and 14 and extremly weak acids have `pK_(a)` values `lt 15` |
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| 84. |
Consider the following sequence of reaction The final product [B] in th reaction would be:A. B. C. D. |
| Answer» Correct Answer - D | |
| 85. |
Which one of the following undergoes reaction with `50%` sodium hydroxide solution to give the corresponding alcohol and acid?A. ButanalB. FormaldehydeC. PhenolD. Benzoic acid |
| Answer» Correct Answer - B | |
| 86. |
The alkyl cyanides when hydrolysed to the corresponding acid, the gas evolved isA. `N_(2)`B. `O_(2)`C. `NH_(3)`D. `CO_(2)` |
| Answer» Correct Answer - C | |
| 87. |
Consider the following sequence of reactions: The final product [B] in the reaction would be:A. MesoB. RacemicC. InversionD. All of these |
| Answer» Correct Answer - B | |
| 88. |
Consider the following sequence of reactions: Intermediate [I] and corresponding major product [P] in the given reactions areA. B. C. D. |
| Answer» Correct Answer - C | |
| 89. |
Consider the following sequence of reactions. The product [A] and [B] are respectivelyA. B. C. D. |
| Answer» Correct Answer - A | |
| 90. |
Consider the following sequence of reactions: Major product [B] of the given reaction would beA. B. C. D. |
| Answer» Correct Answer - C | |
| 91. |
Which of the following reaction is used for detecting the presence of carbonyl group in aldehydes and ketones ?A. Reaction with hydroxylamineB. Reaction with phenyl hydrazineC. Reaction with hydrazineD. All of these |
| Answer» Correct Answer - D | |
| 92. |
Which of the following statements are correct for aldehydes and ketones?A. They are insoluble in organic solvents like benzene, ether, methanal, choloroform etcB. Their solubility increases rapidly on increasing the length of the alkyl chainC. They are used in the blending of perfurmes and flavouring agentsD. All of the above |
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Answer» Correct Answer - D The solubility of aldhydes and ketones decreases rapidly on increassing the length of the alkyl chain. All aldehydes and ketones are fairly soluble in organic. Solvents like benzene, ether, methanol, chloroform etc. In fact many naturlly, occuring aldehydes and ketones are used to in the blending of perfumes and flavouring agents. |
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| 93. |
Monocarboxlic acid shows functional isomerism with (1) Ester (2) aldehydes (3) ketones (4) ethersA. `1,2`B. 1C. `2,3`D. `3,4` |
| Answer» Correct Answer - B | |
| 94. |
Reagents (s) used for the reduction of aldehydes and ketones areA. `LiAlH_(4)`B. `NaBH_(4)`C. Catalytic hydrogenationD. All of these |
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Answer» Correct Answer - D Aldedhyes and ketones are reduced to primary and secondary alcohols respectively by `NaBH_(4) or LiAlH_(4)` as well as by catalytic hydrogenation. |
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| 95. |
Which of the following would be the best synthesis of benzoic acid from bromobenzene?A. B. C. D. |
| Answer» Correct Answer - C | |
| 96. |
Identify the set of reagents/ reaction conditions X and Y in the following of transformations A. `X="Mg"//Et_(2)O. Y=CO_(2)`, followed by `H_(3)O^(+)`B. X=AgCN. Y=(i) `vecOH//H_(2)` (ii)` H_(3)O^(+)`C. `X=NaCN, Y`=(i) `vecOH//H_(2)O` (ii) `H_(3)O^(+)`D. X=alcoholic KOH, Y= (i) HCN, (ii) `H_(3)O^(+)` |
| Answer» Correct Answer - A::C | |
| 97. |
Which of the following reagents are not correctly matched with the reaction ?A. `CH_(3)CH=CHCHO to CH_(3)CH=CHCOOH:" Ammoniacal "AgNO_(3)`B. `CH_(3)CH=CHCHO to CH_(3)CH=CHCH_(2)OH:H_(2)//Pt`C. `R-COOH to R-CH_(2)OH:NaBH_(4)`D. `CH_(3)CH_(2)COCl to CH_(3)CH_(2)CHO:H_(2)Pd//BaSO_(4)` |
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Answer» Correct Answer - B `CH_(3)CH=CHCHOoverset(H_(2)//Pt)toCH_(3)CH_(2)CH_(2)CH_(2)OH` |
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| 98. |
Which reagent or sequence of reagents would best accomplish the following synthesis? A. (i) `LiAlH_(4)` (ii) `H^(+), Delta`B. `NaBH_(4)`C. (i) `Na//NH_(3)` (ii) `NaBH_(4)//H^(+). Delta`D. (i) `Mg // Et_(2)O` (ii) `LiAlH_(6)`, (iii) `H^(+), Delta` |
| Answer» Correct Answer - B | |
| 99. |
Acetals areA. aldehydeB. ketonesC. ethersD. diether |
| Answer» Correct Answer - D | |
| 100. |
Assertion: The `pK_(a)` of acetic acid is lower than that of phenol. Reason : Phenoxide ion is more resonance sabilised.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 Low `pK_(a)` value corresponds to more acidic compound. Acetic acid `(pK_(a) = 4.0)` is more acidic than phenol `(pK_(a) = 9.0)`. It is due to the fact that carboxylate ion is more stabilized due to resonance because its resonating stronating strures are equivalent. |
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