Question

Which of the following is an antifreeze?

• A. water
• B. ether
• C. ethyl alcohol
• D. aniline

Answer 1

Answer: (C)

ethyl alcohol

An antifreeze is a chemical additive which lowers the freezing point of a water-based liquid. An antifreeze mixture is used to achieve freezing point depression for cold environments. Ethyl alcohol has a high kryoscopic constant Kf and the temperature lowered is given by the expressions, depression in freezing point $=K_f\times m$, where m $=$ molarity.