1.

Which of the following statements (I)-(IV) are true about photochemical smog?A. I,II and IVB. II,III and IVC. I,III and IVD. I,II and III

Answer» Correct Answer - D
(Undurnt hydrocarbons+NO) from automoblies
`NO overset(sunlight)(rarr) NO_(2)`
`NO_(2) rarr NO+O`
`O+O_(2) rarr O_(3)`
`O_(3)+NO rarr NO_(2)+O_(2)`
`NO_(2)` and `O_(3)` both the strong oxidizing agents. Undurnt fuel is oxidized to formaldehyde and acrolein and `PAN`.
`CH_(4)+O_(3) rarr HCHO`
`CH_(3)CH_(2)CH_(3) overset(O_3)(rarr) CH_(2) = CHCHO`


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