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Test: MCQs (One or More Correct Option): Aldehydes, Ketones & Carboxylic Acids | JEE Advanced


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19 Questions MCQ Test Chemistry 35 Years JEE Main & Advanced Past year Papers | Test: MCQs (One or More Correct Option): Aldehydes, Ketones & Carboxylic Acids | JEE Advanced

Test: MCQs (One or More Correct Option): Aldehydes, Ketones & Carboxylic Acids | JEE Advanced for JEE 2023 is part of Chemistry 35 Years JEE Main & Advanced Past year Papers preparation. The Test: MCQs (One or More Correct Option): Aldehydes, Ketones & Carboxylic Acids | JEE Advanced questions and answers have been prepared according to the JEE exam syllabus.The Test: MCQs (One or More Correct Option): Aldehydes, Ketones & Carboxylic Acids | JEE Advanced MCQs are made for JEE 2023 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: MCQs (One or More Correct Option): Aldehydes, Ketones & Carboxylic Acids | JEE Advanced below.
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Test: MCQs (One or More Correct Option): Aldehydes, Ketones & Carboxylic Acids | JEE Advanced - Question 1

Base catalysed aldol condensation occurs with :

Detailed Solution for Test: MCQs (One or More Correct Option): Aldehydes, Ketones & Carboxylic Acids | JEE Advanced - Question 1

TIPS/Formulae :

Aldehydes having at least one α-hydrogen atom undergo aldol condensation.


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Test: MCQs (One or More Correct Option): Aldehydes, Ketones & Carboxylic Acids | JEE Advanced - Question 2

Which of the following compounds will give a yellow precipitate with iodine and alkali?

Detailed Solution for Test: MCQs (One or More Correct Option): Aldehydes, Ketones & Carboxylic Acids | JEE Advanced - Question 2

TIPS/Formulae :
Iodoform reaction is given by the compounds containing 
 CH3CHO and CH3CH2OH.2-Hydroxypropane (CH3CHOHCH3) contains the grouping CH3CHOH— and acetophenone (C6H5COCH3) contains the grouping CH3CO– linked to carbon and hence give yellow ppt. with I2 and alkali—iodoform test.
In methyl acetate (CH3COOC2H5) and acetamide (CH3CO–NH2), CH3CO is attached to a hetero atom but not to carbon atom and hence both these compounds do not give iodoform test.

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Test: MCQs (One or More Correct Option): Aldehydes, Ketones & Carboxylic Acids | JEE Advanced - Question 3

Which of the following compounds will react with ethanolic KCN?

Detailed Solution for Test: MCQs (One or More Correct Option): Aldehydes, Ketones & Carboxylic Acids | JEE Advanced - Question 3

NOTE :

Ethyl chloride and acetyl chloride react with alc. KCN by nucleophilic substitution reaction while benzaldehyde undergoes benzoin condensation :


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Test: MCQs (One or More Correct Option): Aldehydes, Ketones & Carboxylic Acids | JEE Advanced - Question 4

Keto-enol tautomerism is observed in

Detailed Solution for Test: MCQs (One or More Correct Option): Aldehydes, Ketones & Carboxylic Acids | JEE Advanced - Question 4

Keto-enol tautomer ism is sh own in compounds having a-hydrogen on the C adjacent to the CO group.

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Test: MCQs (One or More Correct Option): Aldehydes, Ketones & Carboxylic Acids | JEE Advanced - Question 5

Which of the following are examples of aldol condensation?

Detailed Solution for Test: MCQs (One or More Correct Option): Aldehydes, Ketones & Carboxylic Acids | JEE Advanced - Question 5

NOTE : Aldehydes and ketones containing a-Hydrogen atom undergo aldol condensation.

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Test: MCQs (One or More Correct Option): Aldehydes, Ketones & Carboxylic Acids | JEE Advanced - Question 6

A new carbon-carbon bond formation is possible in

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Test: MCQs (One or More Correct Option): Aldehydes, Ketones & Carboxylic Acids | JEE Advanced - Question 7

Which of the following will react with water?

Detailed Solution for Test: MCQs (One or More Correct Option): Aldehydes, Ketones & Carboxylic Acids | JEE Advanced - Question 7

TIPS/Formulae :
Three  Cl of chloral makes its carbonyl carbon highly electron deficient, hence H2O, a nucleophile easily adds on it forming chloral hydrate, CCl3CH(OH)2, which is quite stable due to intramolecular H–bonding between two –OH groups.

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Test: MCQs (One or More Correct Option): Aldehydes, Ketones & Carboxylic Acids | JEE Advanced - Question 8

Which of the following will undergo aldol condensation?

Detailed Solution for Test: MCQs (One or More Correct Option): Aldehydes, Ketones & Carboxylic Acids | JEE Advanced - Question 8

TIPS/Formulae :
Carbonyl compounds having α – H  or α - D undergo aldol condensation.

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Test: MCQs (One or More Correct Option): Aldehydes, Ketones & Carboxylic Acids | JEE Advanced - Question 9

Which of the following reactants on reaction with conc. NaOH followed by acidification gives following lactone as the product?

Detailed Solution for Test: MCQs (One or More Correct Option): Aldehydes, Ketones & Carboxylic Acids | JEE Advanced - Question 9


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Test: MCQs (One or More Correct Option): Aldehydes, Ketones & Carboxylic Acids | JEE Advanced - Question 10

The major products P and Q are

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Test: MCQs (One or More Correct Option): Aldehydes, Ketones & Carboxylic Acids | JEE Advanced - Question 11

The smallest ketone and its next homologue are reacted with NH2OH to form oxime

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Test: MCQs (One or More Correct Option): Aldehydes, Ketones & Carboxylic Acids | JEE Advanced - Question 12

Identify the binary mixture(s) that can be separated into individual compounds, by differential extraction as shown in the given scheme.

Detailed Solution for Test: MCQs (One or More Correct Option): Aldehydes, Ketones & Carboxylic Acids | JEE Advanced - Question 12

(A) Both are soluble in NaOH, hence inseparable.
(B) Only benzoic acid (C6H5COOH) is soluble in NaOH and NaHCO3, while benzyl alcohol (C6H5CH2OH) is not.
Hence, separable.
(C) Although NaOH can enable separation between benzyl alcohol (C6H5CH2OH) and phenol (C6H5OH) as only the later is soluble in NaOH. However, in NaHCO3, both are insoluble. Hence, inseparable.
(D) a-Phenylacetic acid (C6H5CH2COOH) is soluble in NaOH and NaHCO3. While benzyl alcohol (C6H5CH2OH) is not. Hence, separable.

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Test: MCQs (One or More Correct Option): Aldehydes, Ketones & Carboxylic Acids | JEE Advanced - Question 13

With reference to the scheme given below, which of the given statement(s) about T, U, V and W is (are) correct ?

Detailed Solution for Test: MCQs (One or More Correct Option): Aldehydes, Ketones & Carboxylic Acids | JEE Advanced - Question 13


                                              

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Test: MCQs (One or More Correct Option): Aldehydes, Ketones & Carboxylic Acids | JEE Advanced - Question 14

In the following reaction, the product(s) formed is(are)



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Test: MCQs (One or More Correct Option): Aldehydes, Ketones & Carboxylic Acids | JEE Advanced - Question 15

After completion of the reactions (I and II), the organic compound(s) in the reaction mixtures is(are)




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Test: MCQs (One or More Correct Option): Aldehydes, Ketones & Carboxylic Acids | JEE Advanced - Question 16

The major product of the following reaction is

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Test: MCQs (One or More Correct Option): Aldehydes, Ketones & Carboxylic Acids | JEE Advanced - Question 17

Positive Tollen’s test is observed for

Detailed Solution for Test: MCQs (One or More Correct Option): Aldehydes, Ketones & Carboxylic Acids | JEE Advanced - Question 17

Aldehydes and a-Hydroxyketones show positive Tollen's test.


                                            

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Test: MCQs (One or More Correct Option): Aldehydes, Ketones & Carboxylic Acids | JEE Advanced - Question 18

The correct statement(s) about the following reaction sequence is(are)


Detailed Solution for Test: MCQs (One or More Correct Option): Aldehydes, Ketones & Carboxylic Acids | JEE Advanced - Question 18


Q is steam volatile not R.
Q and R show positive test with 1% aqueous FeCl3 solution.
Q, R, S give yellow precipitate with 2, 4-dinitrophenyl hydrazine.

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Test: MCQs (One or More Correct Option): Aldehydes, Ketones & Carboxylic Acids | JEE Advanced - Question 19

Reagent(s) which can be used to bring about the following transformation is (are)

Detailed Solution for Test: MCQs (One or More Correct Option): Aldehydes, Ketones & Carboxylic Acids | JEE Advanced - Question 19

LiAlH4/(C2H5)2O : Reduces to ester s, carboxylic acid, epoxides and aldehydes and ketones.
BH3 in T.H.F : Reduces to –COOH and aldeh ydes into alcohols but do not reduce to esters and epoxides.
NaBH4 in C2H5OH : Reduces only aldehydes and ketones into alcohols but not to others.
Raney Ni in T.H.F. : Do not reduce to –COOH, –COOR and epoxide but it can reduce aldehyde into alcohols.

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