Question

At what temperature do ice crystals form?

(a) Lower than 0°C

(b) More than 0°C

(c) At 0°C

(d) At 4°C

I got this question in an internship interview.

I'd like to ask this question from Crystal Growth topic in chapter Crystallization of Food Processing Unit Operations

Answer 1

Correct choice is (a) Lower than 0°C

Best explanation: There are a number of ways in which ice crystals can form at temperature lower than 0°C. One method contains the rare presence of a particle known as an ice nucleus within a water droplet that acts as a catalyst for freezing.