UNIT 15: Environmental Chemistry - Online Test
Q1. Release of oxides of nitrogen and hydrocarbons into the atmosphere by motor vehicles is prevented by using _______
Answer : Option C
Explaination / Solution:
No Explaination.
Q2. Biochemical oxygen Demand value less than 5 ppm indicates a water sample to be
Answer : Option C
Explaination / Solution:
No Explaination.
Q3. Match
the List I with List II and select the correct answer using the code given
below the lists
Answer : Option C
Explaination / Solution:
No Explaination.
Q4. 
Answer : Option B
Explaination / Solution:
No Explaination.
Q5.
Assertion (A): If BOD level of water in a reservoir is more
than 5 ppm it is highly polluted
Reason(R)
: High biological oxygen
demand means high activity of bacteria in water
Answer : Option D
Explaination / Solution:
No Explaination.
Q6.
Assertion
(A): Excessive use of chlorinated
pesticide causes soil and water pollution.
Reason (R)
: Such pesticides are non-biodegradable.
Answer : Option A
Explaination / Solution:
No Explaination.
Q7.
Assertion
(A): Oxygen plays a key role
in the troposphere
Reason
(R): Troposphere is not responsible
for all biological activities
Answer : Option D
Explaination / Solution:
No Explaination.
