List of top Environmental Chemistry Questions on Pollution control and treatment of effluents

Consider the following statements: 
(i) Environmental pollutant concentration is generally modeled using lognormal distribution. 
(ii) Environmental pollutant concentration is generally modeled using Poisson distribution. 
(iii) The weekly rate of exceedance of environmental pollutant concentration with regards to a given standard is generally modeled using lognormal distribution. 
(iv) The weekly rate of exceedance of environmental pollutant concentration with regards to a given standard is generally modeled using Poisson distribution. 
Choose the correct option(s) from the following:

Consider the following statements:

P: According to the National Ambient Air Quality Standards (Central Pollution Control Board, Govt. of India, notification 2009), annual time-weighted average \( \text{PM}_{10} \) standard is more than \( \text{PM}_{2.5} \) standard.

Q: According to the National Air Quality Index released by Govt. of India in 2015, sub-index value of \( \text{PM}_{10} \) can be less than that of \( \text{PM}_{2.5} \).

Choose the correct option from the following: