1. Esters are formed by reacting the following two species:

Question

(a)	 an alkane and an alkene	
(b)	an organic acid and an inorganic acid
(c)	 an organic acid and an alcohol	
(d)	an alcohol and water 
(e)	 two alcohols

2.	The name 2-methyl-4-butanal is incorrect. What is the correct IUPAC name for this compound?
(a)	4-methyl-2-butanal	
(b)	3-methylbutanal	
(c)	2-methylbutanal 
(d)	 2-methyl-1-butanal 	
(e)	2-methyl-2-butanal 
	
3.	What is the total number of covalent bonds in a molecule of C4H10O?
(a)	 10	
(b)	12	
(c)	14	
(d)	16	
(e)	18 
	
4.	What is the name of the alkyl group containing four carbon atoms?
(a)	 diphenyl	
(b)	trimethyl	
(c)	propyl	
(d)	methyl	
(e)	butyl

5.	The molecule CH3COH is classified as:
(a)	 an ether	
(b)	an ester	
(c)	an aldehyde 
(d)	 a ketone	
(e)	a carboxylic acid

6.	Which of the following compounds is considered to be non-polar?
(a)	 CH3CH2OH	
(b)	CH3CHO	
(c)	CH3COOH 
(d)	 CH3CH2NH2	
(e)	CH3CH2CH3

8.	 Which statement is true of the carbon-carbon bonds in benzene?
		(a)	They are identical to the carbon-carbon bonds in cyclohexane.
		(b)	They are identical to the carbon-carbon bonds in cyclohexene.
		(c)	They are half-way between a double and single bond.
		(d)	They are easily broken in chemical reactions.
		(e)	They are all double bonds.

10.	Identify the set of compounds that have the same functional group.
		(a)	 C2H6, C2H4, C2H2
		(b)	 C2H2, CH3COOH, CH3CONH2
		(c)	 CH3CH2CHO, H2CO, CH3CH2CH2CH2CHO
		(d)	 CH3NH2, CH3CH2CONH2, CH3CH2CONHCH3
		(e)	 CH3C(O)CH3, CH3COOH, CH3CH2CHO

11.  Which of the following compounds is saturated?
(a)	 propene	
(b)	octane	
(c)	3-heptyne	
(d)	2-butene	
(e)	1-butene

12.	What is the common name of the compound CH3COCH3? 
(a)	 acetone	
(b)	wood alcohol	
(c)	formic acid	 
(d)	 acetic acid	
(e)	isopropyl alcohol

13.	Ethyl methanoate is used as an artificial rum flavouring. What type of compound is ethyl methanoate? 
(a)	 carboxylic acid	
(b)	alcohol	
(c)	ketone	
(d)	amide	
(e)	ester

14.	Which formula represents an alkyne?
(a)	 C5H8	
(b)	C5H12	
(c)	C5H16	
(d)	C5H14	
(e)	C5H10

15. Which compound is a carboxylic acid? 
(a)	 CH3CH2OH	
(b)	CH3OCH3	
(c)	CH3COOH 
(d)	 CH3COOCH3	
(e)	CH3C(O)CH3

16.	Which compound is an ether?
(a)	 CH3OH	
(b)	CH3C(O)CH3	
(c)	CH3COH 
(d)	 CH3COOCH3	
(e)	CH3CH2OCH3

20. 	What is one possible name for a compound with the general formula R—OH?
(a)	 methane
(b)	methyl methanoate	
(c)	methanol
(d)	 methanoic acid	
(e)	methanamine

Bot GPT 4-o mini · Answer

Here are the answers to your questions: 1. **Esters are formed by reacting the following two species:** **(c)** an organic acid and an alcohol. 2. **The name 2-methyl-4-butanal is incorrect. What is the correct IUPAC name for this compound?** **(b)** 3-methylbutanal. 3. **What is the total number of covalent bonds in a molecule of C4H10O?** **(b)** 12. (C4H10O has 4 C-C bonds, 10 C-H bonds, and 1 C-O bond, totaling 12 covalent bonds.) 4. **What is the name of the alkyl group containing four carbon atoms?** **(e)** butyl. 5. **The molecule CH3COH is classified as:** **(c)** an aldehyde. 6. **Which of the following compounds is considered to be non-polar?** **(e)** CH3CH2CH3. 8. **Which statement is true of the carbon-carbon bonds in benzene?** **(c)** They are half-way between a double and single bond. 10. **Identify the set of compounds that have the same functional group.** **(b)** C2H2, CH3COOH, CH3CONH2 (all contain a carbonyl (C=O) group). 11. **Which of the following compounds is saturated?** **(b)** octane. 12. **What is the common name of the compound CH3COCH3?** **(a)** acetone. 13. **Ethyl methanoate is used as an artificial rum flavouring. What type of compound is ethyl methanoate?** **(e)** ester. 14. **Which formula represents an alkyne?** **(a)** C5H8. 15. **Which compound is a carboxylic acid?** **(c)** CH3COOH. 16. **Which compound is an ether?** **(e)** CH3CH2OCH3. 20. **What is one possible name for a compound with the general formula R—OH?** **(c)** methanol. Feel free to ask if you need further clarification or additional questions!