Photochemical smog is a resultant of the reaction among

[UPSC Civil Services Exam – 2013 Prelims]

(a) NO2, O3 and peroxyacetyl nitrate in the presence of sunlight

(b) CO, O2 and peroxyacetyl nitrate in the presence of sunlight

(c) CO, CO2 and NO2 at low temperature

(d) High concentration of NO2, O3 and CO in the evening


Answer: (a)        

Explanation:

  • Photochemical smog is a mixture of pollutants that are formed when nitrogen oxides and volatile organic compounds (VOCs) react to sunlight, creating a brown haze above cities.
  • It tends to occur more often in summer, because that is when we have the most sunlight.

Consider the following statements:                                                                   The Parliament of India can place a particular law in the Ninth Schedule of the Constitution of India. The validity of a law placed in the Ninth Schedule cannot be examined by any court and no judgement can be made on it. Which of the statements given above is/are correct?

Consider the following statements:                                               

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Consider the following statements:                                                         The Parliament of India can place a particular law in the Ninth Schedule of the Constitution of India. The validity of a law placed in the Ninth Schedule cannot be examined by any court and no judgement can be made on it. Which of the statements given above is/are correct?

Consider the following statements:                                               

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