1.   Which compound may exist as cis and trans isomers?

      A CH3CH=CHCH3

      B CH2=CHCl


C CH= CH2

 


        D CH3 CH2

 

 


2.     What is the total number of isomeric alkenes of formula C4H8?

           A 2

           B 3

           C 4

           D 5

 

3.     Which one of the following molecules can exist as cis-trans isomers?

          A   (CH3)2C=CHCH3

       B   CH3CH2CH=CHCH3

          C    H2C=CHCH2CH2CH3

          D   CH3CH(CH3)CH=CH2