Question

if we touch liquid nitrogen so what happened?​

Answer 1

Answer:

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If you would touch liquid nitrogen very briefly (I advise that you don't do this) you would certainly feel cold. If you stuck you finger into a flask of it for some time the liquid nitrogen would boil furiously and then your finger would freeze solid.

Answer 2

Liquid nitrogen has a boiling temperature of -196°C at atmospheric pressure. Direct contact can freeze the skin causing frostbite and cold burns. ... It is often stated that splashes of liquid nitrogen will run off bare skin due to a vapour layer forming between the skin and liquid – this must NEVER be relied upon.