U-235
needed to produce a bomb, the spent fuel elements contains……..
a) Uranium-234
b) Uranium-238
c) Polonium
d) Plutonium-239
Which of the following is/are the variety of human activities lead to the emission and removal CO2?
a) fossil fuel combustion and electricity generation
b) transportation, deforestation and geological sequestration
c) industry, residential and commercial sources
d) all of these
Which of the following is/are the greenhouse gas/es leading to global warming?
a) carbon dioxide
b) water vapor and nitrous oxide
c) methane and CFCs
d) all of these
Explanation: the rise in the earth temperature is called global warming
Greenhouse effect is NOT produced by the abundance of …….
a) methane
b) nitrous oxide
c) CO2
d) sulphur dioxide
Which of the following when react with water to produce acid rain?
a) sulphur oxides
b) nitrogen oxides
c) phosphorus oxides
d) both a and b
Which one is NOT responsible for the formation acid rain?
a) CO2
b) SO2
c) NO2
d) CO
