Organic Chemistry I

1. Which of the following molecules is saturated?

C3H8

C3H6

C2H2

C6H6

2. Octane is an alkane containing eight carbon atoms per molecule. What is its condensed structural formula?

C8H14

C4H7

CH3CH2CH2CH2CH2CH2CH2CH3

CH4CH2CH2CH2CH2CH2CH2CH4

3. The structures of two compounds are shown.

Which statement about these two compounds is correct?

They are isomers of each other

They are both saturated compounds

They are in the same homologous series

They are both hydrocarbons

4. Which of the following molecule(s) is/are not an alkane?

I C10H22 II C6H6 III C2H5OH IV C6H12

II only

II and III only

II, III and IV only

III only

5. A molecule has the following structural formula.

What is the name of this molecule?

Octane

2-methyl-3-methylhexane

2,3-dimethylhexane

2-methyl-3-propylhexane

6. What is the number of isomers of formula C5H12?

5

4

3

2

7. 10 cm3 of methane undergoes complete combustion with 30 cm3 of oxygen. What is the total volume of gases at 100 degree celsius?

30 cm3

40 cm3

10 cm3

20 cm3

8. Which statement about the members of a homologous series is correct?

They contain the same number of bonds per molecule

They have the same empirical formula.

They have the same number of carbon atoms per molecule

They undergo similar reactions

9. In the presence of sunlight, alkanes react with bromine. What type of reaction is this?

Addition reaction

Combustion reaction

Decomposition reaction

Substitution

10. Which of the following are possible products when C2H6 is reacted with chlorine gas in the presence of UV?

C2H6Cl and HCl

C2Cl6, C2H5Cl and HCl

C2H5Cl and H2

C2H6Cl