ENVIRONMENTAL CHEMISTRY EXAMINATION
QUESTIONS AND CORRECT ANSWER WITH
EXPLANATION GRADED A+ STUDY GUIDE SOUTHERN
NEW HAMPSHIRE UNIVERSITY
1. Environmental chemistry is the study of:
A. Chemical processes in the environment
B. Cooking reactions
C. Human anatomy
D. Weather forecasting
Answer: A
Rationale: It focuses on chemical interactions in air, water, and soil.
2. The main components of the environment include:
A. Air, water, soil
B. Metals only
C. Plastics only
D. Buildings only
Answer: A
Rationale: These are the major environmental media.
3. The atmosphere is mainly composed of:
A. Nitrogen and oxygen
B. Hydrogen only
C. Carbon only
D. Helium only
Answer: A
Rationale: Nitrogen (~78%) and oxygen (~21%).
4. Greenhouse gases include:
A. CO₂, CH₄, N₂O
B. Oxygen only
C. Nitrogen only
D. Argon only
Answer: A
Rationale: These gases trap heat in the atmosphere.
,5. The greenhouse effect is:
A. Trapping of heat by atmospheric gases
B. Cooling of Earth
C. Rain formation
D. Soil erosion
Answer: A
Rationale: It leads to global warming.
6. Acid rain is mainly caused by:
A. SO₂ and NOx emissions
B. Oxygen
C. Nitrogen
D. Helium
Answer: A
Rationale: These gases form acids in rainwater.
7. pH measures:
A. Acidity or alkalinity
B. Temperature
C. Pressure
D. Density
Answer: A
Rationale: It indicates hydrogen ion concentration.
8. A pH below 7 indicates:
A. Acidic solution
B. Basic solution
C. Neutral solution
D. Salt solution
Answer: A
Rationale: pH < 7 is acidic.
9. A pH above 7 indicates:
A. Basic (alkaline) solution
B. Acidic solution
C. Neutral solution
D. Toxic solution
Answer: A
Rationale: pH > 7 is alkaline.
, 10. Neutral pH is:
A. 7
B. 0
C. 14
D. 1
Answer: A
Rationale: Pure water is neutral.
11. The ozone layer is found in the:
A. Stratosphere
B. Troposphere
C. Lithosphere
D. Hydrosphere
Answer: A
Rationale: It absorbs UV radiation.
12. Ozone protects Earth from:
A. UV radiation
B. Infrared radiation
C. Sound waves
D. Gravity
Answer: A
Rationale: It blocks harmful UV rays.
13. Ozone depletion is mainly caused by:
A. CFCs
B. Oxygen
C. Nitrogen
D. Argon
Answer: A
Rationale: Chlorofluorocarbons destroy ozone.
14. CFCs are used in:
A. Refrigeration and aerosols
B. Cooking
C. Farming
D. Painting
Answer: A
Rationale: Common industrial uses.
QUESTIONS AND CORRECT ANSWER WITH
EXPLANATION GRADED A+ STUDY GUIDE SOUTHERN
NEW HAMPSHIRE UNIVERSITY
1. Environmental chemistry is the study of:
A. Chemical processes in the environment
B. Cooking reactions
C. Human anatomy
D. Weather forecasting
Answer: A
Rationale: It focuses on chemical interactions in air, water, and soil.
2. The main components of the environment include:
A. Air, water, soil
B. Metals only
C. Plastics only
D. Buildings only
Answer: A
Rationale: These are the major environmental media.
3. The atmosphere is mainly composed of:
A. Nitrogen and oxygen
B. Hydrogen only
C. Carbon only
D. Helium only
Answer: A
Rationale: Nitrogen (~78%) and oxygen (~21%).
4. Greenhouse gases include:
A. CO₂, CH₄, N₂O
B. Oxygen only
C. Nitrogen only
D. Argon only
Answer: A
Rationale: These gases trap heat in the atmosphere.
,5. The greenhouse effect is:
A. Trapping of heat by atmospheric gases
B. Cooling of Earth
C. Rain formation
D. Soil erosion
Answer: A
Rationale: It leads to global warming.
6. Acid rain is mainly caused by:
A. SO₂ and NOx emissions
B. Oxygen
C. Nitrogen
D. Helium
Answer: A
Rationale: These gases form acids in rainwater.
7. pH measures:
A. Acidity or alkalinity
B. Temperature
C. Pressure
D. Density
Answer: A
Rationale: It indicates hydrogen ion concentration.
8. A pH below 7 indicates:
A. Acidic solution
B. Basic solution
C. Neutral solution
D. Salt solution
Answer: A
Rationale: pH < 7 is acidic.
9. A pH above 7 indicates:
A. Basic (alkaline) solution
B. Acidic solution
C. Neutral solution
D. Toxic solution
Answer: A
Rationale: pH > 7 is alkaline.
, 10. Neutral pH is:
A. 7
B. 0
C. 14
D. 1
Answer: A
Rationale: Pure water is neutral.
11. The ozone layer is found in the:
A. Stratosphere
B. Troposphere
C. Lithosphere
D. Hydrosphere
Answer: A
Rationale: It absorbs UV radiation.
12. Ozone protects Earth from:
A. UV radiation
B. Infrared radiation
C. Sound waves
D. Gravity
Answer: A
Rationale: It blocks harmful UV rays.
13. Ozone depletion is mainly caused by:
A. CFCs
B. Oxygen
C. Nitrogen
D. Argon
Answer: A
Rationale: Chlorofluorocarbons destroy ozone.
14. CFCs are used in:
A. Refrigeration and aerosols
B. Cooking
C. Farming
D. Painting
Answer: A
Rationale: Common industrial uses.
