Download ch-22 HW answers - HCC Learning Web

Chapter 22: HW questions
1. Alkanes have the general formula
CnH2n+4
2. Alkenes have the general formula
CnH2n
3. Alkynes have the general formula
CnH2n–2
4. Cycloalkanes have the general formula
CnH2n
5. Unsaturated hydrocarbons
A) contain at least one double or triple carbon-carbon bond.
B) contain at least one element other than hydrogen and carbon.
C) contain the maximum number of hydrogens that can bond with the carbon atoms
present.
D) cannot form structural isomers.
E) cannot undergo addition reactions.
6. Which of these molecules is unsaturated?
A) CH4 B) C2H6 C) C4H6 D) C5H12
E) C6H14
7. Select the one molecule that is a saturated hydrocarbon.
A) C2H4 B) C4H8 C) C4H6 D) C4H10 E) C4H2
8. The formula CH3CH2CH2CH=CH2 represents
A) an alkane.
D)
B) a cycloalkane.
E)
C) an alkene.
an alkyne.
an aromatic compound.
9. The formula CH3CCCH3 represents
A) an alkane.
B) a cycloalkane.
C) an alkene.
an alkyne.
an aromatic compound.
D)
E)
Page 1
10. Select the one chiral molecule.
A) CH2Cl2 B) CHFClBr C) CH3F D) CHFCl2
11. The alkane with six carbon atoms is called
E) CH4
Hexane
12. What is the name of the molecule CH3CH2CH2CH2CH2CH2CH2CH3? Octane
13. What is the name of the molecule CH3-(CH2)8-CH3?
Decane
14. What is the systematic name for the compound represented below?
3-methyl-1-pentene
15.The systematic name for the compound represented below is
3-methyl-4-propylheptane
2
16. What is the systematic name for the compound represented below?
1,2-dibromopropane
17.Write the structural formula of 1-butene?
3
18. Which option represents dimethyl ether?
A) CH3CH2OH
B) CH3OH
C) CH3COCH3
D)
E)
CH3OCH3
CH3CH2OCH3
19. The correct structure for 2,3,3-trimethylpentane is
Ans:
20. The group of atoms that is responsible for the characteristic properties of a family of
organic compounds is called a/an
A) reaction center.
D) enzyme.
B) functional group.
E) polyatomic ion.
C) binding site.
21. Which one of the following functional groups is found in alcohols.
Ans: A
22. Which one of the following functional groups is found in carboxylic acids?
Ans: D
4
23. Which one of the following functional groups is found in ketones?
Ans: C
24. Which one of these structures represents an ester functional group?
Ans: E
25. Which one of these choices is the formula for an aldehyde?
A) CH3CHO B) CH3OCH3 C) CH3COCH3 D) CH3COOH
E) HCCH
26. The name for the compound with the formula CH3CH2CH2CH2OH is
Butanol
27. Which type of organic compound does not contain a carbonyl group?
A) ethers B) carboxylic acids C) ketones D) aldehydes E) esters
28. Which type of organic compound contains a hydroxyl functional group?
A) ester B) ether C) carboxylic acid D) aldehyde E) ketone
29. Esters are synthesized from two classes of organic compounds. Those two types of
compounds are
A) acids and bases.
D) amines and alkenes.
B) amines and alcohols.
E) alkenes and bases.
C) alcohols and acids.
5
30. Which choice gives the structures of the reaction products when the ester below is
hydrolyzed in acid solution?
A)
B)
C)
D)
31. The reaction of Cl2 with CH4 to produce methyl chloride is an example of a/an
A) free radical reaction.
D) ester hydrolysis.
B) addition reaction.
E) polymerization.
C) reduction reaction.
6
32. Bromination of benzene (C6H6), an aromatic compound,
A) occurs by substitution rather than addition.
B) occurs by addition rather than substitution.
C) occurs more rapidly than bromination of a nonaromatic compound.
D) results in formation of 1,2,3,4,5,6-hexabromocyclohexane.
E) occurs in the absence of a catalyst.
33. Amines are
A) organic bases that react with water to produce ammonia.
B) organic acids that react with water to produce ammonia.
C) organic bases that react with acids to form ammonium salts.
D) organic acids that react with bases to form ammonium salts.
E) None of the above.
34. Water and ethylene are combined at high temperature and pressures in the presence of
sulfuric acid to produce ethanol according to the following reaction:
CH2=CH2(g) + H2O(g)  CH3CH2OH(g)
What is the hybridization of the bolded carbon atoms in the reactants and products,
respectively?
A) sp3, sp2 B) sp2, sp3 C) sp, sp2 D) sp3, sp E) sp2, sp2
35. A compound with the formula C6H12 may or may not be a saturated hydrocarbon.
Explain.
It can be a hexene or cyclohexane
36. Write the formula for the alcohol and the carboxylic acid from which the following ester
may be synthesized.
Ans:
7
CH3–(CH2)14–COOH and CH3–(CH2)9–OH
37. Name the following compound:
Ans: 2,2-dimethylbutane
38. Name the following compound:
Ans:
2,3-dimethylbutane
39.The systematic name for the hydrocarbon with the following structural formula is
Ans: 3,3-dimethyl pentane
40.The systematic name for the compound with the following structural formula is ?
Ans: 4,5-dimethyl-2-hexene.
8
?
40. Explain with examples sp3,sp2,sp hybridization on carbon compounds (p.1025,1033,1034).
9
41.Is the molecule shown below is chiral, i.e. not superimposable on its mirror image?
Which carbon is chiral in the molecule?
Ans: yes, The carbon with Cl, F, H and CH3 bonded to it.
42. Describe cis-trans isomerism with illustration (p.1033)
10