Assertion :When a bottle of cold carbonated drink is opened, a slight fog forms around the opening. Reason: Adiabatic expansion of the gas causes lowering of temperature and condensation of water vapours.

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
In cold carbonated drink, gas is dissolved under pressure, when pressure is released expansion of gas occurs due to which gas cools down and temperature falls. Condensation of water vapour occurs. The process takes place is very fast so we can assume it as an adiabatic process.
Hence, option A is correct..

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