Question Text
Question 1 :
Excess of which of the following gas in the air is responsible for this green house effect
Question 2 :
Choose the sources which cause air pollution due to suspended particulate matter.
Question 5 :
The type of pollution which is likely to affect Taj Mahal in Agra to a greater extent is ________.
Question 7 :
Incomplete combustion of fuel such as petrol and diesel gives ______.
Question 8 :
Once the algae in water die, they serve as a food for decomposers like -
Question 11 :
State True or False.
We can survive for some time without air but we cannot survive even for a few minutes without food.
Question 14 :
In the following statements, the words in inverted commas are jumbled up. Write them in their correct form. Air contains 78% 'ginroten' and 21% 'gonexy'.
Question 20 :
Which of the following is not a source of air pollution?
Question 22 :
Carbon monoxide is a poisonous gas. It reduces the _____ carrying capacity of the blood
Question 23 :
Oil refineries, paper factories, textile and sugar mills and chemical factories. How do these industries cause harm to water?
Question 24 :
CFCs damage the _____ layer of the atmosphere that protects us from harmful ultraviolet rays of the sun.
Question 25 :
Water contaminated with sewage may contain bacteria, viruses, fungi and parasites which cause diseases like-
