Q1 Which of the following adds/add nitrogen to the soil?
1) Excretion of urea by animals
2) Burning of coal by man
3) Death of vegetation
Select the correct answer using the codes given below.
a) 1 only
b) 2 and 3 only
c) 1 and 3 only
d) 1, 2 and 3
Q2 Consider the following:
1) Carbon dioxide
2) Oxides of Nitrogen
3) Oxides of Sulphur
Which of the above is/are the emission/emissions
from coal combustion at thermal power plants?
a) 1 only
b) 2 and 3 only
c) 1 and 3 only
d) 1, 2 and 3
Q3 What can be the impact of excessive/inappropriate use of nitrogenous fertilisers in agriculture?
1) Proliferation of nitrogen-fixing microorganisms in soil can occur.
2) Increase in the acidity of soil can take place.
3) Leaching of nitrate to the ground-water can
occur.
Select the correct answer using the code given below.
a) 1 and 3 only
b) 2 only
c) 2 and 3 only
d) 1,2 and 3