CBSE Class 12 Aldehydes Ketones and Carboxylic Acids with Answers Multiple Choice Questions with Answers. MCQ Questions Class 12 Aldehydes Ketones and Carboxylic Acids with Answers with Answers Is Prepared Based on Latest Exam Pattern. Students can solve NCERT Class 12 Aldehydes Ketones and Carboxylic Acids with Answers MCQs with Answers to know their preparation level.
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MCQ Questions Class 12 Aldehydes Ketones and Carboxylic Acids with Answers - Set - 5
Question 1:
Polarisation in acrolein can be described as
(a) +δCH2=CH — +δCHO
(b) -δCH2= CH — +δCHO
(c) -δCH2= CH — CHO+δ
(d) +δCH= CH — CHO-δ
Correct Answer – (D)
Question 2:
In this reaction : CH3CHO + HCN → CH3CH(OH)CN →HOH CH3CH(OH)COOH an asymmetric centre is generated. The acid obtained would be
(a) D-isome
(b) L-isomer
(c) 50% D + 50% L-isomer
(d) 20% D + 80% L-isomer
Correct Answer – (C)
Question 3:
The strongest acid amongst the following compounds is
(a) CH3COOH
(b) HCOOH
(c) CH3CH2CH(Cl)CO2H
(d) ClCH2CH2CH2COOH
Correct Answer – (C)
Question 4:
Benzaldehyde on refluxing with aqueous alcoholic KCN produce
(a) cyanobenzene
(b) cyanohydrin
(c) benzoyl cyanide
(d) benzoin
Correct Answer – (D)
Question 5:
Identify the method by which Me3CCO2H can be prepared.
(a) Treating 1 mole of MeCO Me with 2 moles of MeMgI
(b) Treating 1 mole of MeCO2 Me with 3 moles of MeMgI
(c) Treating 1 mole of MeCHO with 3 moles of MeMgI
(d) Treating 1 mole of dry ice with 1 mole of Me3CMgI
Correct Answer – (D)
MCQ Questions Class 12 Aldehydes Ketones and Carboxylic Acids With Answers
Question 6:
Which of the following is incorrect?
(a) FeCl3 is used in detection of phenol.
(b) Fehling solution is used in detection of glucose.
(c) Tollens’ reagent is used in detection of unsaturation.
(d) NaHSO3 is used in detection of carbonyl compound
Correct Answer – (C)
Question 7:
A carbonyl compound reacts with hydrogen cyanide to form cyanohydrin which on hydrolysis forms a racemic mixture of a-hydroxy acid. The carbonyl compound is
(a) formaldehyde
(b) acetaldehyde
(c) acetone
(d) diethyl ketone
Correct Answer – (B)
Question 8:
Which one of the following is an Hell-Volhard-Zelinsky reaction?
Correct Answer – (B)
Question 9:
(a) hydroxy nitrite
(c) cyanohydrin
(b) hydroxy cyanide
(d) hydroxy isocyanide
Correct Answer – (C)
Question 10:
What product is formed when cyclohexanone is oxidised?
(a) HOOC. (CH2)4 · COOH
(b) CH3CH2COOH
(c) CH3(CH2)4COOH
(d) None of the above
Correct Answer – (A)
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