2.2   Hydrocarbons

 

Section A

 

1.  The systematic name of the following compound

    CH3

 

CH3-CH2-C-CH3

 


    Br

is

          A 2-bromo-2-methylbutane

          B   3-bromo-3-methylbutane

          C   2-bromopentane

          D 3-bromopentane

 

2.  25 cm3 of hydrocarbon was exploded with 100 cm3 of oxygen (an excess). After cooling the volume of gas remaining was 62.5 cm3.  On adding concentrated potassium hydroxide and shaking the volume reduced to 12.5 cm3. Which one of the following is the molecular formula of the hydrocarbon?

          A CH4

          B   C2H4

          C   C2H6

          D C3H6