Question

7. Identify the correct statement with respect to the oxygen found in an alcohol as compared to the oxygen found in an ether. a. Oxygen is identical in both these compounds; the difference between them is determined by another factor. b. Oxygen in an alcohol is directly associated with a hydrogen; the oxygen in an ether is not chemically bound to a hydrogen. c. Oxygen is similar in both compounds as it is always found on a terminal carbon. d. The oxygen in an ether is found on a side chain and that of the alcohol is not. 8. What structural characteristic is shared by the aldehydes and the ketones? a. They both are straight chain compounds. b. Both of these compound classes have as the smallest compound a 5 carbon skeleton. 6. Aldehydes and ketones both contain a carbonyl carbon. d. Aldehydes and ketones have no shared characteristics. 9. The name 4,5-dichlorocyclohexanone should be a. 1,2-dichlorocyclohexanone. b. 2,3-dichlorocyclohexanone. c. 3,4-dichlorocyclohexanone. d. 4,5-dichlorocyclohexanone. 10. Which of the following pure compounds can exhibit hydrogen bonding with itself? a Chcel b. Che che cdo d. none of these 11. What is the major difference between a cyclic hemiacetal and a cyclic acetal? a. The cyclic hemiacetal is an alcohol, whereas the cyclic acetal is an ether. b. The cyclic hemiacetal is an acid, and the cyclic acetal is a base. c. The cyclic hemiacetal contains more carbons in the ring than the cyclic acetal. d. All of the responses are correct. 12. Which of the following properly ranks the relative aqueous solubility of each functional group? a. alkene < aldehyde < alcohol <ketone b. aldehyde <ketone <alkene <alcohol c. alkene ketone<alcohol aldehyde d. alkene <ketone<aldehyde <alcohol 13. Which of the following will give both a positive Tollen's test and a positive Benedict's test? " стр. Ферен, C hiogel.com d. All give positive tests for both. - Glaive positive tests for

Answer 1

7) Answer is b). Alcohol contain OH group and ether contain OR group thus in alcohol oxygen is bound to hydrogen but not in ether.

8) Answer is c). Aldehyde is RCHO and ketone is RCOR, both contain Carbonyl group.

9) Answer is c). Numbering of chain occur on that side where groups get least position.

10) Answer is d). Because none of these compounds contain any hydrogen attached to oxygen.

11) Answer is a). Cyclic hemiacetal contain OH group and cyclic acetal contain OR group. Both have same carbon length.

12) Answer is d). Alcohol form H-BONDING thus they are most soluble in water and Alkene are nonpolar thus they are insoluble in water.

13) Answer is a). Aldehyde group give positive tollen's and benedict test.

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