Liquid nitrogen is stored at $77 K$ in a vacuum flask. The surrounding atmospheric temperature in the lab is $33 K$ .

After a few days, the temperature of liquid nitrogen will increase.

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After a few days, the temperature of the lab will decrease.

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After a few days, the temperature of liquid nitrogen will decrease

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After a few days, the temperature of liquid nitrogen will remain unchanged.

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Solution

The correct option is D After a few days, the temperature of liquid nitrogen will remain unchanged.
Liquid nitrogen is stored at $77 K$ in vacuum flask. The surrounding atmosphere temperature of the lab is $33 K$ .
After a few days, the temperature of liquid nitrogen will remain unchanged. Because, vacuum flask is designed to prevent heat loss by conduction, convection and radiation. So, the temperature remains unchanged.

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