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Test: Aldehydes Ketones & Carboxylic Acids


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Test: Aldehydes Ketones & Carboxylic Acids - Question 1

Give the name of the following compound:

Detailed Solution for Test: Aldehydes Ketones & Carboxylic Acids - Question 1

The correct answer is option D(None of the above)
The given compound is 4-Bromo-3methylheptanal

Test: Aldehydes Ketones & Carboxylic Acids - Question 2

Arrange the following alcohols, hydrocarbon and ether in order of their increasing boiling points Pentan – 1 – ol, n – butane, pentanal, ethoxyethane.

Detailed Solution for Test: Aldehydes Ketones & Carboxylic Acids - Question 2

Alcohols have higher boiling points than aldehydes.

Test: Aldehydes Ketones & Carboxylic Acids - Question 3

The compound formed as a result of oxidation of ethyl benzene by KMnO4 is

Detailed Solution for Test: Aldehydes Ketones & Carboxylic Acids - Question 3

Test: Aldehydes Ketones & Carboxylic Acids - Question 4

Give IUPAC names of the following compound:

Detailed Solution for Test: Aldehydes Ketones & Carboxylic Acids - Question 4

This is 1-phenyl propan-1-one.

Test: Aldehydes Ketones & Carboxylic Acids - Question 5

The reagents to bring about the change from but – 2 – ene to ethanal  

Detailed Solution for Test: Aldehydes Ketones & Carboxylic Acids - Question 5

Reductive Ozonolysis of alkene forms aldehyde or ketone.

Test: Aldehydes Ketones & Carboxylic Acids - Question 6

Which of the following is correct?

Detailed Solution for Test: Aldehydes Ketones & Carboxylic Acids - Question 6

C2H5OH get oxidizes to CH3CHO and –COCH3 group is important for iodoform.

Test: Aldehydes Ketones & Carboxylic Acids - Question 7

A strong base can abstract an α – hydrogen from

Detailed Solution for Test: Aldehydes Ketones & Carboxylic Acids - Question 7

Because conjugate base that form will be stable in case of Ketone.

Test: Aldehydes Ketones & Carboxylic Acids - Question 8

Which of the following reagents can be used to convert a carboxylic acid directly into its corresponding acid chloride derivative?

Detailed Solution for Test: Aldehydes Ketones & Carboxylic Acids - Question 8

Test: Aldehydes Ketones & Carboxylic Acids - Question 9

The appropriate reagent for the transformation:

Detailed Solution for Test: Aldehydes Ketones & Carboxylic Acids - Question 9

In this reaction, a CO group is converted to CH2​ group.

This can be achieved by Wolff-Kishner reduction which uses reagent NH2​NH2​, OH (hydrazine in alkaline medium).


Clemmensen reduction (Zn(Hg)/HCl) cannot be used as in presence of HCl, the alcohol may undergo dehydration.

Test: Aldehydes Ketones & Carboxylic Acids - Question 10

What compound is produced when cyclohexene is treated with concentrated KMnO4?

Detailed Solution for Test: Aldehydes Ketones & Carboxylic Acids - Question 10

Conc KMnO4 will cause oxidation and ring opening forming adipic acid.

Test: Aldehydes Ketones & Carboxylic Acids - Question 11

Arrange the following compounds in decreasing order of their acid strength: i) trichloroacetic acid ii) trifluoroacetic acid iii) acetic acid and iv) formic acid

Detailed Solution for Test: Aldehydes Ketones & Carboxylic Acids - Question 11

Acidic strength of carboxylic acid -

–  More acidic than phenols or alcohols.

–  Acidity increase with the presence of a group with  -I effect in the alkyl group.Whereas it decreases with the presence of  +I group.

–  Acidity increases with increase in the number of halogen atoms on  - position.

–  It decreases with increasing distance of halogen from   

–  It increases with increase in the electronegativity of halogen.

- CF3COOH > CCl3COOH > HCOOH > CH3 COOH

Test: Aldehydes Ketones & Carboxylic Acids - Question 12

The combination of a carbonyl group and a hydroxyl group on the same carbon atom is called a __________ group.

Detailed Solution for Test: Aldehydes Ketones & Carboxylic Acids - Question 12

-COOH is carboxyl group.

Test: Aldehydes Ketones & Carboxylic Acids - Question 13

CH3CHO and C6H5CH2CHO can be distinguished chemically by:

Detailed Solution for Test: Aldehydes Ketones & Carboxylic Acids - Question 13

CH3CHO will give iodoform test and C6H5CH2CHO will not give iodoform test.

Test: Aldehydes Ketones & Carboxylic Acids - Question 14

The common name for pentanedioic acid is:

Detailed Solution for Test: Aldehydes Ketones & Carboxylic Acids - Question 14

Pentanedioic acid is glutaric acid.

Test: Aldehydes Ketones & Carboxylic Acids - Question 15

Which of the following acids does not exhibit optical isomerism?

Detailed Solution for Test: Aldehydes Ketones & Carboxylic Acids - Question 15

Maleic Acid shows Geometrical Isomerism but does not give optical isomerism.

Test: Aldehydes Ketones & Carboxylic Acids - Question 16

In the propanoate ion

Detailed Solution for Test: Aldehydes Ketones & Carboxylic Acids - Question 16

This is because of Resonance.

Test: Aldehydes Ketones & Carboxylic Acids - Question 17

Aldehydes are produced on reduction of the following by DIBAL – H

Detailed Solution for Test: Aldehydes Ketones & Carboxylic Acids - Question 17

Both Nitriles and esters are reduced to Aldehyde on reaction with DIBAL-H.

Test: Aldehydes Ketones & Carboxylic Acids - Question 18

Which of the following statements is not correct?

Detailed Solution for Test: Aldehydes Ketones & Carboxylic Acids - Question 18

Aldehydes and ketones have polar C=O group. Therefore they undergo nucleophilic addition reactions.

Test: Aldehydes Ketones & Carboxylic Acids - Question 19

What compound is produced when (CH3)2CHCH2Br is subjected to the following sequence of steps:
1. Mg, Et2
2. CO2
3. H3O+?

Detailed Solution for Test: Aldehydes Ketones & Carboxylic Acids - Question 19

Test: Aldehydes Ketones & Carboxylic Acids - Question 20

The oxidation of toluene to benzoic acid can be stopped at the aldehyde stage, to give benzadehyde, The reagent used for the purpose is one of the following.

Detailed Solution for Test: Aldehydes Ketones & Carboxylic Acids - Question 20

This is Etard Reaction.

Test: Aldehydes Ketones & Carboxylic Acids - Question 21

The oxidation of toluene to benzoic acid can be stopped at the aldehyde stage. The reaction is called?

Detailed Solution for Test: Aldehydes Ketones & Carboxylic Acids - Question 21

Etard is specific reaction for conversion of toluene to Benzaldehyde.

Test: Aldehydes Ketones & Carboxylic Acids - Question 22

The compound obtained when acetaldehyde reacts with dilute aqueous sodium hydroxide exhibits:

Detailed Solution for Test: Aldehydes Ketones & Carboxylic Acids - Question 22

CH3CH=CHCHO is the product which is suitably substituted so will show geometrical isomer.

Test: Aldehydes Ketones & Carboxylic Acids - Question 23

In Hell – Volhard Zelinsky reaction, halogen reacts with

Detailed Solution for Test: Aldehydes Ketones & Carboxylic Acids - Question 23

Alpha Hydrogen containing carboxylic acids undergo HVZ reaction.

Test: Aldehydes Ketones & Carboxylic Acids - Question 24

The following reaction is

 

Detailed Solution for Test: Aldehydes Ketones & Carboxylic Acids - Question 24

This is Wolff Kishner reduction of Carbonyls to alkanes.

Test: Aldehydes Ketones & Carboxylic Acids - Question 25

Many naturally occurring aldehydes and ketones are used in the blending of perfumes and flavouring agents. But the preferred ones are

Detailed Solution for Test: Aldehydes Ketones & Carboxylic Acids - Question 25

Higher aldehydes are preferred.

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