In the fractional distillation of petroleum, separate fractions are collected from the top and the bottom of the fractionating column. Compared with the fraction taken from the bottom of the fractionating column, what properties does the fraction from the top have? 1 higher viscosity 2 lower boiling point 3 lower volatility 4 shorter chain length
- A1 and 2
- B1 and 3
- C2 and 4
- D3 and 4