HomeLearn Fast select Course
Show Unit/ChapterChange UnitChange SubjectLast Menu
NEET-XII-Biology

Bio year:2018

with Solutions -
Qstn# 107 Prvs-QstnNext-Qstn
  • #107
    Which of the following is a secondary pollutant
    (1) CO
    (2) ``CO_2``
    (3) ``SO_2``
    (4) ``O_3``
    digAnsr:   4
    Ans : (4)