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Topic 10: Organic Chemistry

23. Molecular formulas: Determining molecular formula from bond type and name

1. Which formulas represent molecules of saturated hydrocarbons? 4) C4H8 and C4H6
2) C5H10 and C5H8

1) C5H12 and C6H14
3) C4H10 and C5H8

2. Which two formulas represent unsaturated hydrocarbons ?
1) C2H2 and C2H6 2) C2H2 and C2H4 3) C2H6 and C3H8 4) C3H4 and C4H10

3. Which is an unsaturated hydrocarbon?
1) CH2CHCl 2) CH3CH2Cl 3) CH3CH2CH3 4) CH3CHCH2

4. What is the correct formula for butyne?
1) C4H10 2) C4H4 3) C4H6 4) C4H10
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5. Which molecular formula is correct for hexene?
1) C6H10 2) C6H12 3) C6H14 4) C6H6

6. Which condensed formula represents butane? 3) CH3CH3 4) CH3CH2CH3
2) CH3CH2CH2CH3
1) CH3CH2CH2CH2CH3

7. The correct molecular formula for the compound with IUPAC name 2-methyl propane is

2) CH3CH2(CH3)CH2CH3 3) CH3CH2CH2CH3
1) CH3CH(CH3)CH3
4) CH3CH2CH3

8. Chloropropane is correctly represented by which chemical formula?
1) C3H5Cl 2) C3H6Cl 3) C3H7Cl 4) C3H8Cl
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9. Which formula represents the compound 2-fluoropentane? 4) C5H11F2
2) C5H11F
1) C5H10F
3) C5H10F2

10. The formula for dibromobutane is 3) C4H6Br2 4) C4H8Br2

1) C4H6Br
2) C4H9Br

11. Which is the correct formula for butanol?
1) CH3CH2CH2CH2OH 2) CH3CH2OCH2CH3 3) CH3CH2CH2COOH 4) CH3CH2CH2OH

12. The correct formula for hexanol?
1) C6H12OH 2) C6H13OH 3) C6H12 4) C6H14
13. Which formula is a dihydroxy alcohol?
1) Ca(OH)2 2) Al(OH)3 3) C2H4(OH)2 4) C3H5(OH)3

14. The condensed formula that represents methyl propanoate is
1) CH3CH2COOCH3 2) CH3CH2CHO 3) CH3COOH 4) CH3CHO
15. Which chemical formula is correct for ethanal?
1) C2H5CHO 2) CH3CHO 3) C2H5COOH 4) CH3COOH

16. Which best represents propanoic acid?
1) C2H5COOH 2) C3H7COOH 3) C2H5CHO 4) C3H7CHO

17. The correct formula for dimethyl ether is
1) CH3COOCH3 2) CH3OCH3 3) CH3CH3OH 4) CH3COCH3

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