Consider the following statements about Nitrogen Dioxide:

  1. It is a greenhouse gas as per Kyoto protocol
  2. It is a pollutant considered for measuring National Air Quality Index
  3. Nitrogen dioxide is a colourless and odourless gas

Which of the above statements is/are correct?

Answer: [B] 2 Only

The pollutants considered for the measurement of Air Quality Index are (PM10, PM2.5, NO2, SO2, CO, O3, NH3, and Pb) for which short-term (up to 24-hourly averaging period) National Ambient Air Quality Standards are prescribed. Third statement is incorrect because nitrogen dioxide is a reddish-brown gas with a pungent and irritating odour. The Kyoto protocol covers six gases carbon-dioxide (CO2), methane (CH4), nitrous oxide (N2O), hydro fluorocarbons (HFCs), per fluorocarbons (PFCs), and sulphur hexafluoride (SF6).

This question is a part of GKToday's Integrated IAS General Studies Module