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Organic Chemistry Questions and Answers – Physical Properties of Aldehydes | Organic Chemistry Multiple Choice Questions and Answers

Free download in PDF Organic Chemistry Multiple Choice Questions and Answers for competitive exams. These short objective type questions with answers are very important for Board exams as well as competitive exams like UPSC, NDA, SSC etc. These short solved questions or quizzes are provided by Gkseries./p>

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(1) Aldehydes have which type of smell?
[A] Fish like smell
[B] Bitter almond smell
[C] Pungent smell
[D] Rotten egg like smell
Answer: Pungent smell
(2) What is the name of the process in which aldehyde get oxidise in presence of air?
[A] Calcination
[B] Autoxidation
[C] Cannizzaro reaction
[D] Baeyer villiger oxidation
Answer: Autoxidation
(3) Which of the following aldehyde shows oligomerization?
[A] Acetaldehyde
[B] Propanal
[C] Butanal
[D] Benzaldehyde
Answer: Acetaldehyde
(4) What will be the product if we add water to the aldehyde?
[A] Alcohols
[B] Epoxides
[C] Geminal diols
[D] Peroxides
Answer: Geminal diols
(5) In Infrared spectroscopy, at what wave number will band of CO bond of aldehyde will occur?
[A] 1500 cm-1
[B] 1495 cm-1
[C] 1965 cm-1
[D] 1700 cm-1
Answer: 1700 cm-1
(6) What is the chemical shift of formyl hydrogen in aldehyde?
[A] 6
[B] 7
[C] 8
[D] 9
Answer: 9
(7) Which of the following aldehyde is present as gas?
[A] Acetaldehyde
[B] Formaldehyde
[C] Butyraldehyde
[D] Benzaldehyde
Answer: Formaldehyde
(8) Which of the following compound has more boiling point than aldehyde?
[A] Alcohol
[B] Alkanes
[C] Ketones
[D] Ether
Answer: Alcohol
(9) Which of the following is the characteristic smell of benzaldehyde?
[A] Fish like smell
[B] Bitter almond like
[C] Pungent smell
[D] Rotten egg like smell
Answer: Bitter almond like
(10) Which of the following aldehyde is most soluble in water?
[A] Acetaldehyde
[B] Formaldehyde
[C] Butyraldehyde
[D] Benzaldehyde
Answer: Formaldehyde
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