Which of the following has a zero dipole moment?
1. 1-butene
2. cis-2-butene
3. trans-2-butene
4. 2 methyl-1-propene
The hydrocarbons having the lowest dipole moment among the following is:
1.
2. CH3 - C ≡ C - CH3
3. CH3 CH2 CH = CH2
4. CH2 = CH - C ≡ CH