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CUET Chemistry Questions Aldeydes Ketone Carboxylic Acids AMBIPi

Hi CUET aspirants, Welcome to Amans Maths Blogs (AMBIPi). In this post, you will get CUET Chemistry Mock Aldeydes Ketone Carboxylic Acids AMBIPi. This CUET Chemistry Mock Test is of the Chemistry chapter Aldeydes Ketone Carboxylic Acids. Before solving these CUET Chemistry questions, you must read CUET Chemistry Notes, which helps you to revise CUET Chemistry Syllabus and then you must need to solve CUET Previous Years Questions Papers.

CUET Chemistry Mock Test

CUET Chemistry Question No: 1

Carbonyl compounds are the constituents of

Option A : fabrics

Option B : flavouring

Option C : plastics and drugs

Option D : All of these

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Option D: All of these 

Carbonyl compounds are of almost importance to organic chemistry.They are the constituents of fabrics, flavourings, plastics and drugs.

CUET Exam Chemistry Question No: 2

The most suitable reagent for the conversion of R — CH2 — OH → R — CHO is 

Option A : KMnO4

Option B : K2Cr2O7

Option C : H2SO4

Option D : PCC (pyridinium chlorochromate)

Show/Hide Answer Key

Option D: PCC (pyridinium chlorochromate)

The most suitable reagent for the conversion of alcohol

(RCH2 — OH) to aldehyde ( R — CHO ) is PCC:

R — CH2OH → R — CHO Pyridinium chlorochromate is a mild oxidising agent which causes the conversion of alcohol to aldehyde and not carboxylic acid. Whereas, K2Cr2O7 and KMnO4 are strong oxidising agents which causes conversion of alcohol directly to acid and H2SO4 is a dehydrating agent. Thus, they cannot be used for the conversion.

CUET UG Chemistry Question No: 3

Alcohol vapours are passed over which of the following catalysts to give aldehydes and ketones?

Option A : S or Pd

Option B : Ag or Cu

Option C : F or Cl

Option D : Li or K

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Option B: Ag or Cu

Alcohol vapours are passed over heavy metal catalysts (Ag or Cu) to give aldehydes and ketones. Primary and secondary alcohols give aldehydes and ketones respectively.

CUET Domain Subject Chemistry Question No: 4

The reaction, RCN + SnCI2 + HCI → RCH = NH→ RCHO is known as

Option A : Etard reaction

Option B : Haloform reaction

Option C : Gattermann-Koch reaction

Option D : Stephen reaction

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Option D: Stephen reaction

RCN + SnCI2 + HCI → RCH = NH→ RCHO is known as This reaction is called Stephen reaction, where nitriles are reduced to corresponding imine with stannous chloride in the presence of HCl, which on hydrolysis gives corresponding aldehyde.

CUET BSc Chemistry Question No: 5

Reaction by which benzaldehyde cannot be prepared is

Option A :

Option B :

Option C :

Option D :

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Option D: D

CUET Entrance Exam Chemistry Question No: 6

The compounds methanal, ethanal and propanone are miscible with water because they form

Option A : van der Waals’ forces with water

Option B : ‘H’-bonding with water

Option C : dipole-dipole bond with water

Option D : ion-dipole bond with water

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Option B: ‘H’-bonding with water 

The lower members of aldehydes and ketones such as methanal, ethanal and propanone are miscible with water in all proportions because they form hydrogen bonding with water.

CUET Exam Question No: 7

Identify the example in which nucleophilic addition followed by elimination reaction occur respectively in the carbonyl compound

Option A : Addition of Grignard reagent

Option B : Addition of sodium sulphide

Option C : Addition of HCN

Option D : Addition of NH3

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Option D: Addition of NH3

CUET Chemistry Practice Questions No: 8

Consider the reaction given below.

CH2 = CH — CHO → CH2 = CH — CH2 — OH

Which of the following is the suitable reagent for the conversion of following reaction?

Option A : NaBH4

Option B : Ni/H2

Option C : Zn/Hg/HCI

Option D : Red P + Hi

Show/Hide Answer Key

Option A: NaBH

The suitable reagent for the given conversion is NaBH4

CH2 = CH — CHO → CH2 = CH — CH2 — OH

It is a selective reagent and does not reduce carbon-carbon double bond. Thus, unsaturated alcohols can be prepared by this reagent.

CUET Chemistry Sample Paper Question No: 9

On heating an aldehyde with Fehling’s reagent, a reddish brown precipitate is obtained due to the formation of

Option A : CuO

Option B : Cu2O

Option C : CuSO4

Option D : Cu2+ + OH

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Option B: Cu2O

On heating an aldehyde with Fehling’s reagent, a reddish
brown precipitate is obtained due to the formation of Cu2O. Aldehydes are oxidised to corresponding carboxylate anion. The reaction involved is as follows

RCHO + 2Cu2+ + 5 OH → RCOO + Cu2O↓ + 3H20

Red brown
ppt.

CUET Chemistry Mock Test Question No: 10

Which of the following compounds produces an orange-red precipitate with 2, 4-DNP reagent?

Option A : Acetamide

Option B : Dimethyl ether

Option C : Butanone

Option D : Propylbutanoate

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Option C: Butanone

2, 4-DNP reagent reacts with carbonyl compounds (aldehydes and ketones) to produce orange-red precipitate. Among the given compounds, butanone is a carbonyl compound and, thus can react with 2, 4-DNP reagent.

CUET Chemistry Question No: 11

Predict the products in the given reaction.

Option A :

Option B :

Option C :

Option D :

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Option C: C

CUET Exam Chemistry Question No: 12

Some higher members of aliphatic carboxylic acids known as fatty acids occur in natural fats as esters of glycerol. How many C-atoms do they contain?

Option A : C12 – C18

Option B : C10 – C15

Option C : C5 , – C10

Option D : C20 – C30

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Option A: C12 – C18 

(a) Some higher members of aliphatic carboxylic acids containing C12 – C18 are known as fatty acids and they occur in natural fats as esters of glycerol. Therefore, the correct option is (a).

CUET UG Chemistry Question No: 13

What is the common name of 2-methylpropanoic acid?

Option A : Adipic acid

Option B : Crotonic acid

Option C : Isobutyric acid

Option D : Acrylic acid

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Option C: Isobutyric acid

CUET Domain Subject Chemistry Question No: 14

Select the acid(s) which cannot be prepared by Grignard reagent?

Option A : Acetic acid

Option B : Succinic acid

Option C : Formic acid

Option D : All of these

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Option A: Acetic acid

CUET BSc Chemistry Question No: 15

Carboxylic acids have higher boiling points than aldehydes, ketones and even alcohols of comparable molecular mass. It is due to

Option A : more extensive association of carboxylic acid via
van der Waals’ force of attraction

Option B : formation of carboxylate ion

Option C : formation of intramolecular H-bonding

Option D : formation of intermolecular H-bonding

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Option D: formation of intermolecular H-bonding

CUET Entrance Exam Chemistry Question No: 16

Which of the following reagents is/are used for the conversion of ethanoic acid to ethanoic anhydride?

Option A : SOCI2, Δ

Option B : PCI3 , Δ

Option C : P2O5, Δ

Option D : All of these

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Option C: P2O5, Δ

Reagents that are used for the conversion of ethanoic acid to ethanoic anhydride are mineral acids such as H2SO4 or with P2O5

CUET Exam Question No: 17

Diborane easily reduce the functional group such as

Option A : acid

Option B : ester

Option C : nitro

Option D : halo

Show/Hide Answer Key

Option A: Acid 

Diborane does not easily reduce functional groups such as ester, nitro, halo etc. Carboxylic acids are reduced to primary alcohols by lithium aluminium hydride or with diborane.

CUET Chemistry Practice Questions No: 18

Name the product formed during the decarboxylation of malonic acid.

Option A : Acetic acid

Option B : Ethanone

Option C : Propanone

Option D : Formic acid

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Option A: Acetic acid

CUET Chemistry Sample Paper Question No: 19

Aromatic carboxylic acids do not undergo Friedel-Crafts reaction because

Option A : carboxyl group acts as an activating and meta-directing group

Option B : carboxyl group act as a deactivating and ortho and para directing group

Option C : carboxyl group act as an activating and ortho-directing group

Option D : carboxyl group acts as deactivating and the catalyst

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Option B: carboxyl group act as a deactivating and ortho and para directing group

The order of reactivity of hydrogen halides with ether is as follows. HI > HBr > HCl. The cleavage of ethers take place with concentrated HI or HBr at high temperature.

CUET Chemistry Mock Test Question No: 20

Which of the following acid is used in rubber, textile, dyeing, leather and electroplating industries?

Option A : Hexanedioic acid

Option B : Ethanoic acid

Option C : Methanoic acid

Option D : Sodium benzoate

Show/Hide Answer Key

Option C: Methanoic acid

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