MEDIUMMCQ SINGLEIChO (Chemistry Olympiad)Inorganic ChemistryEnvironmental ChemistryPrevious Year Questions
Assertion (A): London smog is oxidising in nature. Reason (R): London smog contains O3, NO2 and hydrocarbons. (AIIMS2009)
A.Both A and R are correct and R is the correct
B.Both A and R are correct but R is not the correct
C.A is correct but R is incorrect
D.Both A and R are incorrect✓ Correct
Explanation
London smog is formed at low temperature, i.e., in early hours of winter months and contains SO2, smoke and dust particles. Hence, it is reducing in nature.