Bihar Board - Class 12 - Chemistry - Chapter 12: Aldehydes, Ketones and Carboxylic Acids Multiple Choice Questions ( MCQs)
The multiple choice questions for Chapter 12: Aldehydes, Ketones and Carboxylic Acids of Class 12 Chemistry are provided here in English. These questions are based on the NCERT curriculum for Class 12. They are designed to help students assess their understanding of the key concepts covered in the chapter. These multiple choice questions will be useful not only for the Class 12 board exams but also for entrance exams like NEET. The questions for Bihar Board Class 12 Chemistry, Chapter 12: Aldehydes, Ketones and Carboxylic Acids, have been prepared by expert teachers at Vidyakul.
Multiple Choice Question
1. Which of the following will not give aldol condensation ?
(A) Phenyl acetaldehyde
(B) 2-Methylpentanal
(C) Benzaldehyde
(D) 1-Phenylpropanone
Answer ⇒ (C) Benzaldehyde
2. Identify reactant (X) in the given reaction sequence
CH3COCH3+X (CH3)3-OMG-Cl(CH3)3C-OH +
(A) CH3MgCl
(B) CH3COCl+Mg
(C) MgCl2
(D) CH3CH2MgCl
Answer ⇒ (A) CH3MgCl
3. The order of reactivity of CH3CHO , CH3COC2H5 and CH3COCH3 is
(A) CH3CHO >CH3COCH3> CH3COC2H5
(B) CH3COC2H5>CH3COCH3>CH3CHO
(C) CH3COCH3>CH3CHO > CH3COC2H5
(D) CH3COCH3>CH3COC2H5>CH3CHO
Answer ⇒ (A) CH3CHO >CH3COCH3> CH3COC2H5
4.
The product (X) will be
. CH2ONa
(A) |
. COONa
. COOH
(B) |
. COOH
. CH2OH
(C) |
. COONa
. CH2OH
(D) |
. CH2OH
Answer ⇒ (C)
5. Find the product of the given reaction
Answer ⇒ (B)
6. CH3-CCH CH3 – C – CH3
. ||
. O
Structure of ‘A’ and type of isomerism in the above reaction are respectively
(A) prop-1-en-2-ol, metamerism
(B) prop-1-en-1-ol, tautomerism
(C) prop-2-en-2-ol, geometrical isomerism
(D) prop-1-en-2-ol, tautomerism
Answer ⇒ (D) prop-1-en-2-ol, tautomerism
7. Which of the following compounds will give butanone on oxidation with an alkaline KMnO4 solution ?
(A) Butan-1-ol
(B) Butan-2-ol
(C) Both of these
(D) None of these
Answer ⇒ (B) Butan-2-ol
8. Which of the following reaction can be used for the reduction
(A) Clemmensen reaction
(B) Wolft-Kishner reaction
(C) Wurtz reaction
(D) HI and red phosphorus.
Answer ⇒ (C) Wurtz reaction
9. Propionic acid forms compound [D] in the course of the reaction. The structure of compound [D] will be
CH3CH2COCl [B] [C] [D]
(A) CH3CH2NH2
(B) CH3CH2CH2NH2
(C) CH3CH2CONH2
(D) CH3CH2NHCH3
Answer ⇒ (A) CH3CH2NH2
10. Propanone can be prepared from ethyne by
(A) passing a mixture of ethyne and steam over a catalyst, magnesium at 420C
(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
Answer ⇒ (C) boiling ethyne with water in the presence of HgSO4 and H2SO4
