Environmental chemistry PAT practice questions

Water that soaks through the soil and carries dissolved substances into the soil is called A: acid rain B: leachate C: Contaminant D: filtrate

B

Solid (toxic) hazardous wastes are destroyed in: A: Sanitary landfills B: Incinerators C: Sewage treatment plants D: Septic tanks

B

Certain types of bacteria present in the roots of certain plants are responsible for A: Nitrogen fixation B: Decomposing dead matter C: Cleaning up the soil D:Accumulating phosphorous in the soil

A

In most sewage treatment processes, there is a stage at which the waste is broken down by bacteria. The fact that this waste can be broken down by bacteria indicates that the waste is A: Biodegradable B: Organic C: Non-toxic D: Natural

A

The increase in the amount of harmful substances in each trophic level of the food chain is called A: Biomagnification B: Biodegradation C: Concentration D: Intensification

A

Frank was testing a sample of a liquid in science class. When a piece of blue litmus paper was placed into the liquid, the litmus paper turned pink. The liquid was most likely A: A base B: An acid C: A salt solution D: A pollutant

B

In order to carry out certain life activities efficiently, living organisms need some nutrients in small quantities (micronutrients) and other nutrients in large quantities (macronutrients). Which of the following elements is not a macronutrient? A: Nitrogen B: Fluorine C: Phosphorous D: Calcium

B

Mucor, a saprophytic fungus, grows on decaying food material. Mucor obtains it nutrition from A: Tree bark B: Bread C: Rocks D: Water

B

When sodium Carbonate (baking soda) enters the stomach, it reacts with the hydrochloric acid (HCI) in the stomach to reproduce salt, water, and carbon dioxide. From this information, a conclusion that could be made is that baking soda is A: a salt B: a base C: an element D contaminants

B

Which of the following organic compounds found in living organisms is responsible for heredity? A: Fats B: Nucleic acids C: Proteins D: Carbohydrates

B

A scientist wanted to know which of the three cities received the strongest acid rain. The scientist collected a sample of rain from each of the three cities and conducted the following experiment. I. A 50 mL sample of rain from each city was carefully measured II. Drops of a base (sodium hydroxide) were added to the sample III. The number of drops of base required to bring up the pH of each sample was counted. The reaction known that occurred in this experiment is known as A: Oxidation B: Reduction C: Neutralization D: Equalization

C

LD50 is the standard used to compare the toxicity of any substance. LD50 means that A: 50 animals would die if they consume a dose of the toxic substance B: 50% of the animals would die if they consume a dose of the toxic substance C: 50% of the test population of animals would die if they consume a specific dose of the toxic substance D: 50% of the test population of animals would die if they consume any amount of the toxic substance.

C

Roots of plants absorb water from the soil through the process of: A: Active transport B: Passive transport C: Osmosis D: Absorption

C

The tiny spaces between soil particles through which water flows are called... A: Holes B: Membranes C: Pores D: Contaminants

C

Which of the following is not a fossil fuel? A: Coal B: Oil C: Hydrogen D: Natural gas

C

A solution was made by dissolving 3mL of food colouring in 997mL of water. In this solution, the concentration of food colouring is A: 18ppm B: 300 ppm C: 1800 ppm D: 3000 ppm

D

The organic substance containing carbon, hydrogen, and nitrogen that are responsible for the growth and repair of worn out tissues are A: Carbohydrates B: Lipids C: Nucleic Acids D: Protiens

D

The organic substances containing carbon, hydrogen and nitrogen that are responsible for the growth and repair of worn-out tissues are A: Carbohydrates B: Lipids C: Nucleic acids D: Proteins

D

Which of the following statements is not true A: In the summer, the water in a lake can become cloudy and oxygen content is reduced. B: Trout are bio-indicators of oxygen content in water C: The clarity of the water can indicate that water is free from pollution D: The presence of bacteria in water is harmful

D