General Chemistry The Essential Concept 7th Edition Raymond By Chang – Test Bank

Chapter 11: Introduction to Organic Chemistry

1. Alkanes have the general formula
A) CnH2n–4. B) CnH2n–2. C) CnH2n. D) CnH2n+2. E) CnH2n+4.
Ans: D Category: Easy Section: 11.2

2. Alkenes have the general formula
A) CnH2n–4. B) CnH2n–2. C) CnH2n. D) CnH2n+2. E) CnH2n+4.
Ans: C Category: Easy Section: 11.2

3. Alkynes have the general formula
A) CnH2n–4. B) CnH2n–2. C) CnH2n. D) CnH2n+2. E) CnH2n+4.
Ans: B Category: Easy Section: 11.2

4. Cycloalkanes have the general formula
A) CnH2n–4. B) CnH2n–2. C) CnH2n. D) CnH2n+2. E) CnH2n+4.
Ans: C Category: Easy Section: 11.2

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.
Ans: A Category: Easy Section: 11.2

6. Which of these molecules is unsaturated?
A) CH4 B) C2H6 C) C4H6 D) C5H12 E) C6H14
Ans: C Category: Medium Section: 11.2

7. The formula CH3CH2CH2CH=CH2 represents
A) an alkane. D) an alkyne.
B) a cycloalkane. E) an aromatic compound.
C) an alkene.
Ans: C Category: Easy Section: 11.2

8. Which one of these hydrocarbons does not have isomers?
A) C7H16 B) C6H14 C) C5H10 D) C4H8 E) C3H8
Ans: E Category: Medium Section: 11.2

9. How many structural isomers are there of C4H10?
A) 4 B) 6 C) 2 D) 8 E) 10
Ans: C Category: Medium Section: 11.2

13. The two molecules represented below are examples of
CH3–CH2–O–CH2CH3 CH3CH2CH2CH2–OH
A) geometric isomers. D) stereoisomers.
B) structural isomers. E) None of these.
C) optical isomers.
Ans: B Category: Medium Section: 11.2

14. Which of these species is an aromatic compound?
A) C2H2 B) C6H12 C) C6H4Br2 D) C5H10 E) C2H4Br2
Ans: C Category: Medium Section: 11.3

15. The octane rating of gasoline refers to its
A) percentage C8H18 by volume.
B) radiation dose.
C) alcohol level.
D) ability to resist engine knocking.
E) percentage of unsaturated hydrocarbons.
Ans: D Category: Medium Section: Chemistry in Action: The Petroleum Industryx