Class/Course - Class XI

Subject - Chemistry

Chapter - Environmental Chemistry

Attention Class XI standard Aspirants! Just Exam provide a platform to all students who want to make practice for various subject online. We prepare this platform on the base of CBSE. If you want to join our unlimited test series, then please write us at about your class/course

Dear User, Kindly login/register to view answer & explanation of each question.
Click here to Login/Sign Up.
Q.1 Which one of the following statement is not true?
  Oxides of sulphur, nitrogen and carbon are the most widespread air pollutant
  pH of drinking water should be between 5.5-9.5
  Concentration of DO below 6 ppm is good for the growth of fish
  Clean water would have a BOD value of less than 5 ppm