The most abundant element in the universe is
a. hydrogen.
b. iron.
c. oxygen.
d. carbon.
[Ques. 2] Albedo changes may result from ______________ pollution.
Fill in the blank(s) with correct word
[Ques. 3] Which of the following, along with O2, is an allotrope of oxygen?
a. O3
b. O2-
c. O
d. O4
[Ques. 4] The component in CFCs that is responsible for destroying ozone is ______________.
Fill in the blank(s) with correct word
[Ques. 5] An example of a diatomic molecule of a compound is
a. P4.
b. NO2.
c. N2.
d. CO.
[Ques. 6] In the amended Montreal Protocol, many nations agreed to phase out ______________ by the year 2000.
Fill in the blank(s) with correct word
[Ques. 7] Pencil lead (graphite) is made primarily of
a. oil.
b. PbO2.
c. carbon.
d. Pb.
[Ques. 8] A color-coded ______________ Index is used to indicate how good or bad the air is, in terms of pollution.
Fill in the blank(s) with correct word
[Ques. 9] Diamond, graphite, and buckyballs are
a. isotopes.
b. allotropes.
c. isomeres.
d. diatomic.
[Ques. 10] The type of smog that forms in Los Angeles is called ______________ smog.
Fill in the blank(s) with correct word
Quick Reply
