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

Both Assertion and Reason are correct and Reason is the correct explanation for Assertion

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Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion

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Assertion is correct but Reason is incorrect

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Both Assertion and Reason are incorrect

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Solution

The correct option is A Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
$option A is correct.$

$The process is based upon Joule-Thomson Effect,which states,$ $"when a gas under high pressure is allowed to expand adiabatically$ $through a fine hole into a region of low pressure,it is accompanied by cooling.$
$And work is done at the loss of internal energy of the gas.$

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