Assertion (A): Classical smog occurs in cold humid climate and it is acidic as well as reducing in nature.
Reason (R): It is a mixture of smoke, fog and sulphur dioxide.

Both A and R are correct and R is the correct explanation of A.

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Both A and R are correct but R is not the correct explanation of A.

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A is correct but R are not correct.

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A is not correct but R is correct.

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Solution

The correct option is A Both A and R are correct and R is the correct explanation of A.
Classical smog occurs in cold humid climate. It is a mixture of smoke, fog and sulphur dioxide. Presence of $S O_{2}$ makes it both acidic as well as reducing.

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Assertion (A): Classical smog occurs in cold humid climate and it is acidic as well as reducing in nature. Reason (R): It is a mixture of smoke, fog and sulphur dioxide.

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Assertion (A): Classical smog occurs in cold humid climate and it is acidic as well as reducing in nature. Reason (R): It is a mixture of smoke, fog and sulphur dioxide.

The correct option is A Both A and R are correct and R is the correct explanation of A.Classical smog occurs in cold humid climate. It is a mixture of smoke, fog and sulphur dioxide. Presence of SO2 makes it both acidic as well as reducing.

Assertion (A): Classical smog occurs in cold humid climate and it is acidic as well as reducing in nature.
Reason (R): It is a mixture of smoke, fog and sulphur dioxide.

The correct option is A Both A and R are correct and R is the correct explanation of A.
Classical smog occurs in cold humid climate. It is a mixture of smoke, fog and sulphur dioxide. Presence of $S O_{2}$ makes it both acidic as well as reducing.