MCQ Questions for Class 12 Chemistry Chapter 12 Aldehydes, Ketones and Carboxylic Acids Part-1 with Answers

Aldehydes, Ketones and Carboxylic Acids Part-1 Class 12 Chemistry MCQs Questions with Answers

Check the below NCERT MCQ Questions for Class 12 Chemistry Chapter 12 Aldehydes, Ketones and Carboxylic Acids Part-1 with Answers Pdf free download. MCQ Questions for Class 12 Chemistry with Answers were prepared based on the latest exam pattern. We have Provided Aldehydes, Ketones and Carboxylic Acids Part-1 Class 12 Chemistry MCQs Questions with Answers to help students understand the concept very well.

Class 12 Chemistry Chapter 12 Quiz

Class 12 Chemistry Chapter 12 MCQ Online Test

You can refer to NCERT Solutions for Class 12 Chemistry Chapter 12 Aldehydes, Ketones and Carboxylic Acids Part-1 to revise the concepts in the syllabus effectively and improve your chances of securing high marks in your board exams.

Aldehydes, Ketones and Carboxylic Acids Part-1 Class 12 Chemistry MCQ online test

Q1.	Which of the following reactions will give benzolphenone? (i) Benzoyl chloride + Benzene + AlCl₃ (ii) Benzoyl chloride + Phenylmagnesium bromide (iii) Benzoyl chloride + Diphenyl cadmium
	A.(i)and(ii)
	B.(ii) and (iii)
	C.(i) and (iii)
	D.(i), (ii) and (iii)

Ans: (i) and (iii)

Q2.	Propanone can be prepared from ethyne by
	A.passing a mixture of ethyne and steam over a catalyst, magnesium at 420°C
	B.passing a mixture of ethyne and ethanol over a catalyst zinc chromite
	C.boiling ethyne with water in the presence of HgSO₄ and H₂SO₄
	D.treating ethyne with iodine and NaOH

Ans: boiling ethyne with water in the presence of HgSO₄ and H₂SO₄

Q3.	The oxidation of toluene to benzaldehyde by chromyl, chloride is called
	A.Etard reaction
	B.Riemer-Tiemann reaction
	C.Wurtz reaction
	D.Cannizzaro’s reaction

Ans: Etard reaction

Q4.	There is a large difference in the boiling points of butanal and butanal-1-oldueto
	A.intermolecular hydrogen bonding in butan-1-ol
	B.intermolecular hydrogen bonding in butanal
	C.higher molecular mass of butan-1-ol
	D.resonance shown by butanal

Ans: intermolecular hydrogen bonding in butan-1-ol

Q5.	The addition of HCN to carbonyl compounds is an example of
	A.nucleophilic addition
	B.electrophilic addition
	C.free radical addition
	D.electromeric addition

Ans: nucleophilic addition

Q6.	Aldehydes other than formaldehyde react with Grignard’s reagent to give addition products which on hydrolysis give
	A.tertiary alcohols
	B.secondary alcohols
	C.primary alcohols
	D.carboxylic acids

Ans: secondary alcohols

Q7.	Which of the following will not give aldol condensation?
	A.Phenyl acetaldehyde
	B.2-Methylpentanal
	C.Benzaldehyde
	D.1-Phenylpropanone

Ans: Benzaldehyde

Q8.	Which of the following compounds does not react with NaHSO₃?
	A.HCHO
	B.C₆H₅COCH₃
	C.CH₃COCH₃
	D.CH₃CHO

Ans: C₆H₅COCH₃

Q9.	Which of the following compounds will ive a coloured crystalline compound with
	A.CH₃COCl
	B.CH₃COOC₂H₅
	C.CH₃COCH₃
	D.CH₃CONH₂

Ans: CH₃COCH₃

Q10.	The product of hydrolysis of ozonide of 1-butene are
	A.ethanol only
	B.ethanal and methanal
	C.propanal and methanal
	D.methanal only

Ans: propanal and methanal

Q11.	Identify reactant (X) in the given reaction sequence
	A.CH₃MgCl
	B.CH₃COCl +Mg
	C.MgCl₂
	D.CH₃CH₂MgCl

Ans: CH₃MgCl

Q12.	α-Hydroxypropanoic acid can be preapred from ethanal by following the steps given in the sequence
	A.Treat with HCN followed by acidic hydrolysis
	B.Treat with NaHSO₃ followed by reaction with Na₂CO₃
	C.Treat with H₂SO₄ followed by hydrolysis
	D.Treat with K₂Cr₂O₇ in presence of sulphuric acid

Ans: Treat with HCN followed by acidic hydrolysis

Q13.	Which of the following compounds will undergo Cannizzaro reaction?
	A.CH₃CHO
	B.CH₃COCH₃
	C.C₆H₅CHO
	D.C₆H₅CH₂CHO

Ans: C₆H₅CHO

Q14.	Benzoyl Chloride on reduction with H₂/Pd-BaSO₄ produces
	A.benzoic acid
	B.benzyl alochol
	C.benzoyl sulphate
	D.benzaldehyde

Ans: benzaldehyde

Q15.	What is the test to differentiate between penta-2-one and pentan-3-one?
	A.Iodoform test
	B.Benedict’s test
	C.Fehling’s test
	D.Aldol condensation test

Ans: Iodoform test

Q16.	Which of the following does not undergoCannizzarro’s reaction?
	A.Benzaldehyde
	B.2-Methylpropanal
	C.p-Methoxybenzaldehyde
	D.2, 2-Dimethylpropanal

Ans: 2-Methylpropanal

Q17.	Aldehydes that do not undergo aldol condensation are 1. propanal 2. trichloroethanal 3. 2-phenylethanal 4. fethanal 5. benzaldehyde
	A.3 and 4 only
	B.2 and 5 only
	C.1, 2 and 3 only
	D.2, 3 and 5 only

Ans: 2 and 5 only

Q18.	The best oxidising agent- for oxidation of CH₃-CH = CH-CHO to CH₃-CH = CH-COOH is
	A.Baeyefs reagent
	B.Tollen’s reagent
	C.SchifFs reagent
	D.Acidified dichromate

Ans: Tollen’s reagent

Q19.	Study the given reaction and identify the process which is carried out
	A.It is used for purification of aldehydes and ketones
	B.It is used to distinguish aldehydes from ketones
	C.It is used to prepare cyclic aldehydes and ketones
	D.It is used to study polar nature of aldehydes and ketones

Ans: It is used for purification of aldehydes and ketones

Q20.	Hydrocarbons are formed when aldehydes and ketones are reacted with amalgamated zinc and conc. HCl. The reaction is called
	A.Cannizzaro reaction
	B.Clemmensen reduction
	C.Rosenmund reduction
	D.Wolff-Kishner reduction