Water Pollution Quiz Questions and Answers PDF - 45

MCQ 221: What involved in wastewater final treatment ?

1. BOD
2. Chlorination
3. Sedimentation
4. All of above

MCQ 222: Antarctic ozone layer is known as

1. Ozone hole
2. Stratosphere
3. Mesosphere
4. All of above

MCQ 223: The organisms, obtain energy from sunlight and make organic matter from inorganic substance, known as

1. Heterotrophs
2. Autotrophs
3. Consumers
4. Decomposers

MCQ 224: Why the consumers cannot make their own food ?

1. Lack of favorable conditions
2. Lack of energy
3. Lack of chlorophyll
4. All of above

MCQ 225: Which chemical is used in air conditions and refrigerators ?

1. CFCs
2. Chlorine
3. Fluorine
4. Carbon