CS/BCA/SEM-4/HU-401/2013
2013
ENVIRONMENT AND ECOLOGY
Time Allotted : 3 Hours Full Marks : 70
The figures in the margin indicate full marks.
Candidates are required to give their answers in their own words
as far as practicable.
GROUP – A
( Multiple Choice Type Questions )
1. Choose the correct answers for the following :
10 × 1 = 10
i) Which one of the following acids is present in normal
rain ?
a) Carbonic acid b) Sulphuric acid
c) Hydrocarbonic acid d) Nitric acid.
ii) Trickling filter is used under
a) Primary treatment b) Secondary treatment
c) Tertiary treatment d) Advanced treatment.
iii) Toxic metal when mixes with water causes
a) Environmental pollution
b) Noise pollution
c) Air pollution
d) Water pollution.