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Statement I: When a gas is allowed to expand adiabatically through a fine hole from a region of high pressure to the region of low pressure, the temperature of the gas falls.
Statement II: Work is done at the cost of internal energy of the gas.

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Statement I is false and Statement II is true.

Statement I is true and statement II is false.

Statement I and Statement II are false.

Statement I and Statement II are true.

answer is A.

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Detailed Solution

For an Adiabatic process, q=0

gas is suddenly expanding work is done by the system , Internal energy decreases

Internal energy is a measure of temperature.

As Temperature decreases, cooling effect is observed

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