Refer to CBSE Class 12 Chemistry Aldehydes Ketones and Carboxylic Acids MCQs provided below. CBSE Class 12 Chemistry MCQs with answers available in Pdf for free download. The MCQ Questions for Class 12 Chemistry with answers have been prepared as per the latest syllabus, CBSE books and examination pattern suggested in Class 12 by CBSE, NCERT and KVS. Multiple Choice Questions for Chapter 12 Aldehydes Ketones and Carboxylic Acids are an important part of exams for Class 12 Chemistry and if practiced properly can help you to get higher marks. Refer to more Chapter-wise MCQs for CBSE Class 12 Chemistry and also download more latest study material for all subjects
MCQ for Class 12 Chemistry Chapter 12 Aldehydes Ketones and Carboxylic Acids
Class 12 Chemistry students should refer to the following multiple-choice questions with answers for Chapter 12 Aldehydes Ketones and Carboxylic Acids in Class 12. These MCQ questions with answers for Class 12 Chemistry will come in exams and help you to score good marks
Chapter 12 Aldehydes Ketones and Carboxylic Acids MCQ Questions Class 12 Chemistry with Answers
Question : Which of the following forces explain the boiling point of aldehydes and ketones?
(a) Hydrogen bonding
(b) van der Waal’s forces
(c) Dipole-dipole attraction
(d) None of these
Answer : C
Question : Which is highly soluble in water?
(a) Methanal
(b) Propanal
(c) Propanone
(d) Butanone
Answer : A
Question : Propanal and propanone, both have same molecular formula(C3H6O), what do you expect about their boiling points?
(a) Both have same boiling point
(b) Boiling point of propanal is higher than the boiling point of propanone.
(c) Boiling point of propanal is lower than the boiling point of propanone
(d) Nothing can be predicted
Answer : C
Question : Less reactivity of ketone is due to
(a) + I inductive effect decrease positive charge on carbonyl carbon atom
(b) steric effect of two bulky alkyl groups
(c) sp2 hybridised carbon atom of carbonyl carbon atom
(d) Both (a) and (b)
Answer : D
Question : Acetaldehyde reacts with
(a) Electrophiles only
(b) Nucleophiles only
(c) Free radicals only
(d) Both electrophiles and nucleophiles
Answer : B
Question : Carbonyl compounds undergo nucleophilic addition because of
(a) electronegativity difference of carbon and oxygen atoms
(b) electromeric effect
(c) more stable anion with negative charge on oxygen atom and less stable carbonium ion
(d) None of the above
Answer : C
Question : Which of the following statement is false ?
(a) Cannizzaro reaction is given by aldehydes in presence of alkali
(b) Aldol condensation is given by aldehydes in presence of alkali
(c) Aldol condensation is given by aldehydes and ketones in presence of acids
(d) None of the above
Answer : D
Question : If formaldehyde and KOH are heated, then we get
(a) methane
(b) methyl alcohol
(c) ethyl formate
(d) acetylene
Answer : B
Question : Aldehydes can be oxidised by :
(a) Tollen’s reagent
(b) Fehling solution
(c) Benedict solution
(d) All the above
Answer : D
Question : 2-pentanone and 3-pentanone can be distinguished by :
(a) Cannizaro's reaction
(b) Aldol condensation
(c) Iodoform reaction
(d) Clemmensen's reduction
Answer : C
(b) Butan-2-ol
(d) None of these
Answer : B
(b) acetone
(d) methyl acetate
Answer : A
(b) 4-methylisopropyl ketone
(d) Isopropylmethyl ketone
Answer : C
(b) 2-methyl pent-3-one
(d) 2-methyl pent-2-one
(b) sp3-p-overlapping
(d) s-p-overlapping
Answer : A
(b) p-p-overlapping
(d) p-d-overlapping
Answer : B
(b) Meadow sweet
(d) All of these
Answer : D
(b) Propanal
(d) Hexanal
Answer : D
Answer : A
(b) Secondary alcohol
(d) All of these
(b) Ketone
(d) Acid
(b) Pd/BaSO4
(d) anhydrous ZnCl2
Answer : B
(b) 20 –25%
(d) 2 – 4%
Answer : C
(b) K2Cr2O7 / H+
(d) All of these
Answer : C
(b) Wurtz reaction
(d) Fittig reaction
Answer : C
Answer : C
(b) Hydrolysis
(d) Decarboxylation
Answer : B
Answer : D
Answer : D
Answer : A
(b) aldoxime
(d) alcohol
Answer : B
(b) secondary alcohol
(d) aldehyde
(b) Benzylalcohol
(d) Benzophenone
Answer : A
(b) van der Waal’s forces
(d) None of these
Answer : C
(b) Propanal
(d) Butanone
Answer : A
(b) methyl alcohol
(d) acetylene
Answer : B
Answer : C
(b) NaOH
(d) MgCO3
(b) Fehling’s reagent
(d) Schiff’s acid
Answer : C
(b) Ethanol
(d) 3-Pentanone
(b) Zn-Hg/HCl
(d) CH3MgI
(b) CuO
(d) Cu(OH)2
Answer : A
(b) CH3 (CHOH)3CHO
(d) Both (a) and (b)
(b) H2S
(d) None of these
Answer : A
(b) Reimer-Tiemann reaction
(d) None of these
Question : Which of the following contain an aldehyde?
(a) Vanilla beans
(b) Meadow sweet
(c) Cinnamon
(d) All of these
Answer : D
Question : Which of the following have pleasant smell?
(a) Methanal
(b) Propanal
(c) Ethanal
(d) Hexanal
Answer : D
Question : Which one of the following can be oxidised to the corresponding carbonyl compound?
(a) 2-hydroxy-propane
(b) Ortho-nitrophenol
(c) Phenol
(d) 2-methyl-2 hydroxy-propane
Answer : A
Question : Which one of the following on oxidation gives a ketone ?
(a) Primary alcohol
(b) Secondary alcohol
(c) Tertiary alcohol
(d) All of these
Answer : B
Question : What is formed when a primary alcohol undergoes catalytic dehydrogenation ?
(a) Aldehyde
(b) Ketone
(c) Alkene
(d) Acid
Answer : A
Question : Primary and secondary alcohols on action of reduced coppergive
(a) Aldehydes and ketones respectively
(b) Ketones and aldehydes respectively
(c) Only aldehydes
(d) Only ketones
Answer : A
Question : The oxidation of toluene to benzaldehyde by chromyl chloride is called
(a) Rosenmund reaction
(b) Wurtz reaction
(c) Etard reaction
(d) Fittig reaction
Answer : C
Question : An aldehyde group can be present
(a) in between carbon chain
(b) at any position in carbon atom
(c) only at the end of carbon chain
(d) at the second carbon atom of the carbon chain
Answer : C
Question : Which of the following is not used in the preparation of ketone?
(a) Oxidation of secondary alcohols
(b) Dehydrogenation of 2° alcohol
(c) Pyrolysis of calcium acetate
(d) Acid hydrolysis of alkyl cyanide
Answer : D
Question : Which of the following forces explain the boiling point of aldehydes and ketones?
(a) Hydrogen bonding
(b) van der Waal’s forces
(c) Dipole-dipole attraction
(d) None of these
Answer : C
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CBSE Class 12 Chemistry Chapter 12 Aldehydes Ketones and Carboxylic Acids MCQs
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