Practice Quiz

MTEL Chemistry Practice Exam - Question List

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1.
A chemist hypothesizes that a newly developed photodegradable plastic will degrade twice as fast as currently available photodegradable plastics. Which of the following investigations would best test this hypothesis?
  1. Modeling the chemical reactions involved in the degradation of the new plastic and using this model to project degradation rates under different environmental conditions.
  2. Subjecting the new plastic and the existing plastics to the same environmental conditions and measuring their degradation rates.
  3. Comparing the degradation rate of the new plastic with the degradation rates provided by the manufacturers of the existing photodegradable plastics.
  4. Exposing the new photodegradable plastic to conditions of constant UV radiation and no UV radiation and comparing the resulting degradation rates.
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2.
Several unknown solutions have been tested for the presence of Group 1 or Group 2 metals using a flame-test protocol. Which of the following methods would be the best way to represent the collected data?
  1. A table
  2. A histogram
  3. A scatter plot
  4. A line graph
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3.
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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4.
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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5.
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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