SELECT * FROM question_mgmt as q WHERE id=6501 AND status=1 SELECT id,question_no,question,chapter FROM question_mgmt as q WHERE courseId=12 AND subId=16 AND chapterId=381 and ex_no='1' AND status=1 ORDER BY CAST(question_no AS UNSIGNED) CBSE Free NCERT Solution of 8th science Pollution of Air and Water explain the differences between pure air and pollu

Question:

Explain the differences between pure air and polluted air.

Answer:

Pure air contains 78% nitrogen, 21% oxygen, 0.03% carbon dioxide and other gases that present in the minute quantity. When some harmful substances or other poisonous gases mixed up in the air then the air become polluted. When these pollutants react with water and lead to acid rain.


< Previous Question

Next Question >

SELECT ex_no,question,question_no,id,chapter FROM question_mgmt as q WHERE courseId='12' AND subId='16' AND ex_no!=0 AND status=1 and id!=6501 ORDER BY views desc, last_viewed_on desc limit 0,10

  • Popular questions of class 8 Science

SELECT ex_no,question,question_no,id,chapter FROM question_mgmt as q WHERE courseId='12' AND subId='16' AND ex_no!=0 AND status=1 and id!=6501 ORDER BY last_viewed_on desc limit 0,10

  • Recently Viewed Questions of Class 8 Science

Comments

  • Answered by Ekta Mehta
  • 4 months ago

Taking Screenshots on your Samsung Galaxy M31s is very easy and quick.

  • Answered by Ekta Mehta
  • 4 months ago

Taking Screenshots on your Samsung Galaxy M31s is very easy and quick.

  • Answered by Ekta Mehta
  • 4 months ago

Taking Screenshots on your Samsung Galaxy M31s is very easy and quick.

Comment(s) on this Question


NCERT Solutions

Quick Links

Resources

Support