Window Help Exam 2.CHM 102 Spring 2018.pdf (page 1 of 8) CHM 102 Spring 2018 Exa

Question

Window Help Exam 2.CHM 102 Spring 2018.pdf (page 1 of 8) CHM 102 Spring 2018 Exam 2 Please put all answers on a Scantron, which is available in the class 1. Which of the following molecule is an aldehyde? Due Date: April 10, 2018 CH3-CH2-CH:-C-OH b. CH,-C-CH d. CH,-CHO 2. Comparison of the boiling points of akdehydes and ketones with those of other compounds of similar molecular mass shows that they are a). lower than those of alkanes and alcohols b). higher than those of alcohols c). about the same as those of alkanes and alcohols d). higher than those of alkanes 3. Which of the following is not a property of aldehydes and ketones? a) They are polar. b) They have lower boiling points than alcohols of similar molar mass. c) They have higher boiling points than alkanes of similar molar mass d) They cannot form hydrogen bends with water because they have no hydrogen atoms bonded 4. In the Benedict's test, a) an aldehyde is oxidized. b) a silver mirror is prodaced c) the copper (II) ion is oxidized. d) all of these 5. What is the product of oxidation of 2-butanone? a) butanal b) 2-butanol c) butanoic acid d) 1-butanol

Explanation / Answer

Ans-1, d) Aldehyde are functional group which containing -CHO

Ans-2, d) alkane have lower boiling points than aldehyde and ketones, and alcohal have higher boiling points than aldehyde and ketone because of strong hydrogen boinding.

Ans-3, d) aldehyde and ketone are form hydrogen bond with water. -CHO.......HOH

Ans-4, a) benedict test are used to determination of CHO groups and sugar.

Ans-5, None of the any option, Ketone are not easily oxidized, in some cases they oxidized like Baeyer-Villiger Oxidation, they gives ester.

Ans-6, b) Tollens reagent are used to determination of aldehyde group and alfa hydroxy ketones but not simple ketones.

Ans-7, c

Ans-8, d

Ans-9, b

Ans-10, b

Ans-11, c

Ans-12, a (methyl alcohal)

Ans-13, b

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