Passage IV
Alcohols are carbon compounds that contain a hydroxyl (-OH) group bonded to a C atom. If the hydroxyl-bonded C atom is bonded to only one other C atom, or to no other C atoms, the alcohol is a primary alcohol. Table 1 lists the chemical formula, melting point, and boiling point for several primary alcohols.
Figure 1 shows how the viscosity (in centipoise, cp)of 3 primary alcohols varies with temperature.
Figure 2 shows how the viscosity of aqueous solutions of the same 3 alcohols varies with alcohol concentration at 20℃.
19. Which of the alcohols listed in Table 1 has the lowest freezing point?
Your Answer is
Correct Answer is B
Explanation
Freezing point = melting point, so according to table 1, the lowest melting point is -126°C of 1-propanol