Q.

Super cooling stands for cooling of a liquid –

A. at freezing point
B. below freezing point
C. at melting point
D. above melting point
Answer» B. below freezing point
Explanation: Supercooling, also known as undercooling, is the process of lowering the temperature of a liquid or a gas below its freezing point without it becoming a solid. A good example of this phenomenon is clouds in high altitude that are an accumulation of supercooled droplets of water below their freezing point. Refrigeration is a popular commercial application of supercooling.
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