Practice Quiz

Praxis II: Chemistry Exam Prep - Question List

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71.
A chemistry class is planning to use a fume exhaust hood to study the reaction between the elements copper and sulfur. Before beginning the experiment, the teacher will review with the class the proper use of the exhaust hood. Which of the following instructions should be included in this discussion?
  1. Avoid using Bunsen burners within the fume exhaust hood.
  2. Turn off the fan while performing the experiment.
  3. Keep the sash in its lowered position during the experiment.
  4. Step away from the fume exhaust hood once the reaction has begun.
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72.
When a chemical is transferred from a stock bottle into another container for use in the laboratory, the label on the new container must include the name and formula of the chemical, its concentration, and the:
  1. Room number of the laboratory.
  2. Date the stock reagent bottle was received.
  3. Hazard warnings for the chemical.
  4. Phone number of the chemical hygiene officer.
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73.
Which of the following is an example of a chemistry protocol being carried out in a safe manner?
  1. Heating a compound in a test tube over a flame with the test tube opening oriented away from people.
  2. Evaporating acetone from a beaker using direct heat from a Bunsen burner.
  3. Using a glass stirring rod to assist in pouring a solution of NaClO into a beaker containing HCl.
  4. Transferring a beaker containing boiling water directly from a hot plate into an ice bath.
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74.
A student splashes a chemical into an eye during a lab experiment. Which of the following is the first thing the teacher should do when responding to this situation?
  1. Drive the student to an emergency room at the closest area hospital.
  2. Flush the student's eye with water at the eyewash after checking for the presence of a contact lens.
  3. Alert the school administrators that an accident has occurred.
  4. Call the local poison control center for guidance on how to treat the student.
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75.
The use of carbon-reinforced plastic auto parts which are strong and lightweight is growing in the automotive industry. The use of this type of plastic in the automobile manufacturing process has led to a reduction in the:
  1. Amount of soil contaminated with toxic heavy metals.
  2. Amount of carbon dioxide emitted into the atmosphere.
  3. Rate of eutrophication occurring in freshwater systems.
  4. Rate of ozone depletion occurring in the atmosphere.
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