Carbonyl Compounds and Carboxylic Acids Practice Test

12th Standard Chemistry — Carbonyl Compounds and Carboxylic Acids: Online Practice Test

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The correct structure of the product 'A' formed in the reaction (NEET) [Figure] is

A reaction scheme showing a cyclic carbonyl compound reacting with hydrogen and palladium to form product A, with options showing different chemical structures.

A.(figure A)

B.(figure B)

C.(figure C)

D.(figure D)

The formation of cyanohydrin from acetone is an example of

A.nucleophilic substitution B.electrophilic substitution C.electrophilic addition D.nucleophilic addition

Reaction of acetone with one of the following reagents involves nucleophilic addition followed by elimination of water. The reagent is

A.Grignard reagent B.Sn / HCl C.hydrazine in presence of slightly acidic solution D.hydrocyanic acid

In the following reaction, HC ≡ CH (H2SO4 / HgSO4) -> X Product 'X' will not give

A.Tollen's test B.Victor meyer test C.Iodoform test D.Fehling solution test

CH2 = CH2 i) O3 ii) Zn / H2O -> X (NH3) -> Y. 'Y' is

A.Formaldelyde B.di acetone ammonia C.hexamethylene tetraamine D.oxime

Predict the product Z in the following series of reactions Ethanoic acid (PCl5) -> X (C6H6 / Anhydrous AlCl3) -> Y (i. CH3MgBr, ii. H3O+) -> Z.

A.(CH3)2 C(OH)C6H5 B.CH3 CH(OH)C6H5 C.CH3 CH(OH)CH2 - CH3 D.CH2 - OH

Assertion: 2,2 – dimethyl propanoic acid does not give HVZ reaction. Reason: 2 – 2, dimethyl propanoic acid 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.assertion is true but reason is false D.both assertion and reason are false.

Which of the following represents the correct order of acidity in the given compounds

A.FCH2COOH > CH3COOH > BrCH2COOH > ClCH2COOH B.FCH2COOH > ClCH2COOH > BrCH2COOH > CH3COOH C.CH3COOH > ClCH2COOH > FCH2COOH > BrCH2COOH D.ClCH2COOH > CH3COOH > BrCH2COOH > ICH2COOH

Benzoic acid i) NH3/heat -> A (NaOBr) -> B (NaNO2 / HCl) -> C (H2O) -> D. 'C' is

A.anilinium chloride B.O – nitro aniline C.benzene diazonium chloride D.m – nitro benzoic acid

Q10

Ethanoic acid (P / Br2) -> 2 – bromoethanoic acid. This reaction is called

A.Finkelstein reaction B.Haloform reaction C.Hell – Volhard – Zelinsky reaction D.none of these

Q11

CH3Br (KCN) -> (A) (H3O+) -> (B) (PCl5) -> (C). product (C) is

A.acetylchloride B.chloro acetic acid C.alpha- chlorocyano ethanoic acid D.none of these

Q12

Which one of the following reduces tollens reagent

A.formic acid B.acetic acid C.benzophenone D.none of these

Q13

புரோமோபென்சீனின் வேதி வினை மாற்றத்தைக் காட்டும் படம் மற்றும் நான்கு கரிமச் சேர்மங்களின் வடிவங்கள்.

A.(figure A)

B.(figure B)

C.(figure C)

D.(figure D)

Q14

The IUPAC name of the following structure is:

ஒரு நிறைவுறாத கார்பாக்சிலிக் அமிலத்தின் வேதி அமைப்பு.

A.but – 3- enoicacid B.but – 1- ene-4-oicacid C.but – 2- ene-1-oic acid D.but -3-ene-1-oicacid

Q15

Identify the product formed in the following reaction:

அசிட்டோபீனோனின் ஒடுக்க வினை மற்றும் நான்கு கரிமச் விளைபொருள்களின் வடிவங்கள்.

A.(figure A)

B.(figure B)

C.(figure C)

D.(figure D)

Q16

In which case chiral carbon is not generated by reaction with HCN?

A.(figure A)

B.(figure B)

C.(figure C)

D.(figure D)

Q17

Assertion : p – N, N – dimethyl aminobenzaldehyde undergoes benzoin condensation Reason : The aldehydic (-CHO) group is meta directing

Q18

Which one of the following reaction is an example of disproportionation reaction?

A.Aldol condensation B.cannizaro reaction C.Benzoin condensation D.none of these

Q19

Which one of the following undergoes reaction with \(50\%\) sodium hydroxide solution to give the corresponding alcohol and acid?

A.Phenylmethanal B.ethanal C.ethanol D.methanol

Q20

The reagent used to distinguish between acetaldehyde and benzaldehyde is:

A.Tollens reagent B.Fehling’s solution C.2,4 – dinitrophenyl hydrazine D.semicarbazide

Q21

Phenyl methanal is reacted with concentrated NaOH to give two products X and Y. X reacts with metallic sodium to liberate hydrogen. X and Y are:

A.sodiumbenzoate and phenol B.Sodium benzoate and phenyl methanol C.phenyl methanol and sodium benzoate D.none of these

Q22

In which of the following reactions new carbon – carbon bond is not formed?

A.Aldol condensation B.Friedel craft reaction C.Kolbe’s reaction D.Wolf kishner reduction

Q23

An alkene “A” on reaction with \(O_3\) and \(Zn - H_2O\) gives propanone and ethanal in equimolar ratio. Addition of HCl to alkene “A” gives “B” as the major product. The structure of product “B” is:

A.(figure A)

B.(figure B)

C.(figure C)

D.(figure D)

Q24

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

A.more extensive association of carboxylic acid via van der Waals force of attraction B.formation of carboxylate ion C.formation of intramolecular H-bonding D.formation of intermolecular H – bonding

Q25

What is the IUPAC name for the compound commonly known as mesityl oxide?

A.4-methylpent-3-en-2-one B.2-methylpent-2-en-4-one C.4-methylpent-2-en-3-one D.3-methylpent-3-en-2-one

Q26

In a carbonyl group, the carbon atom uses which of the following hybridisations to form its sigma bonds?

A.sp B.\(sp^{2}\) C.\(sp^{3}\) D.\(dsp^{2}\)

Q27

Which of the following reagents is specifically used to oxidize a primary alcohol to an aldehyde while preventing further oxidation to a carboxylic acid?

A.Acidified \(K_{2}Cr_{2}O_{7}\) B.Alkaline \(KMnO_{4}\) C.Pyridinium chlorochromate (PCC) D.Hot concentrated \(HNO_{3}\)

Q28

The dry distillation of which of the following calcium salts produces propanone (acetone)?

A.Calcium formate B.Calcium acetate C.Calcium propionate D.Calcium benzoate

Q29

Aldehydes and ketones have significantly higher boiling points than non-polar hydrocarbons of similar molar mass primarily due to:

A.Strong covalent bonding B.Intermolecular hydrogen bonding C.Weak dipole-dipole interactions D.Vigorous van der Waals forces

Q30

What is the final organic product obtained when a cyanohydrin undergoes complete acid hydrolysis?

A.An \(\alpha\)-hydroxy acid B.An \(\alpha\)-amino acid C.A primary amine D.An aliphatic nitrile

Q31

According to Popoff's rule, during the vigorous oxidation of an unsymmetrical ketone, which part of the molecule is favored to retain the carbonyl group?

A.The larger alkyl group B.The smaller alkyl group C.The group with the least hydrogens D.The group with branching

Q32

In the mechanism of aldol condensation of acetaldehyde, what is the specific role of the dilute NaOH base in the first step?

A.To protonate the carbonyl oxygen B.To act as a nucleophile attacking the carbon C.To remove an \(\alpha\)-hydrogen atom as a proton D.To dehydrate the final aldol product

Q33

Which of the following aromatic aldehydes undergoes the Cannizzaro reaction when treated with concentrated alkali?

A.Acetaldehyde B.Benzaldehyde C.Propanal D.Phenylacetaldehyde

Q34

What is the correct IUPAC name for the dicarboxylic acid commonly known as succinic acid?

A.Ethane-1,2-dioic acid B.Propane-1,3-dioic acid C.Butane-1,4-dioic acid D.Pentane-1,5-dioic acid

Q35

The reaction of a Grignard reagent with dry ice followed by acid hydrolysis is used to synthesize which class of compounds?

A.Ketones B.Carboxylic acids C.Primary alcohols D.Acid anhydrides

Q36

The Hell-Volhard-Zelinsky (HVZ) reaction is specifically used to introduce which substituent into a carboxylic acid?

A.A hydroxyl group at the \(\beta\)-position B.A halogen atom at the \(\alpha\)-position C.An amino group at the terminal position D.An alkyl group into the benzene ring

Q37

Which of the following substituted acetic acids is the most acidic?

A.Fluoroacetic acid B.Chloroacetic acid C.Bromoacetic acid D.Iodoacetic acid

Q38

What is the correct decreasing order of reactivity of carboxylic acid derivatives towards nucleophilic acyl substitution?

A.Acid halide > Acid anhydride > Ester > Amide B.Amide > Ester > Acid anhydride > Acid halide C.Acid halide > Ester > Acid anhydride > Amide D.Acid anhydride > Acid halide > Amide > Ester

Q39

Which named reaction involves the self-condensation of an ester containing at least one \(\alpha\)-hydrogen in the presence of a strong base to form a \(\beta\)-keto ester?

A.Aldol condensation B.Perkin's reaction C.Claisen condensation D.Kolbe's reaction

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This free online practice test covers Carbonyl Compounds and Carboxylic Acids from the 12th Standard Chemistry (Samacheer Kalvi) syllabus. Choose the number of questions and an optional time limit, then answer and submit — everything is checked in your browser, with the correct answers and a worked explanation shown at the end. For the full solutions to every question in this set, see the solved MCQs page.

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