ATI TEAS 7
Chemistry
1. Which of the following is an example of a nonpolar solvent?
- A. Water
- B. Ethanol
- C. Acetone
- D. Hydrochloric acid
Correct answer: B
Rationale: Rationale: - Water (option A) is a polar solvent due to its uneven distribution of charge, with the oxygen atom being partially negative and the hydrogen atoms being partially positive. - Ethanol (option B) is a nonpolar solvent because it has a symmetrical molecular structure that does not result in significant charge separation. - Acetone (option C) is a polar solvent as it contains a carbonyl group that results in a partial negative charge on the oxygen atom. - Hydrochloric acid (option D) is a polar solvent due to the presence of the highly electronegative chlorine atom, which results in a partial negative charge.
2. In the phrase "a drop in the bucket," "bucket" represents:
- A. A literal container
- B. A large quantity
- C. A specific goal
- D. An obstacle
Correct answer: B
Rationale: The phrase signifies that something is insignificant compared to a much larger amount.
3. Which property of a substance refers to the force exerted on an object due to gravity?
- A. Mass
- B. Weight
- C. Density
- D. Volume
Correct answer:
Rationale: Weight is the measure of the force exerted on an object due to gravity. It is calculated as mass multiplied by the acceleration due to gravity.
4. Julius stresses the importance of promoting ‘esprit d corps’ among the members of the unit.
- A. “Let’s work together in harmony; we need to be supportive of one anotherâ€
- B. “In order that we achieve the same results; we must all follow the directives of Julius and not
- C. “We will ensure that all the resources we need are available when needed.â€
- D. “We need to put our efforts together in order to raise the bar of excellence in the care we
Correct answer: D
Rationale: The correct answer is D because it emphasizes the idea of collective effort and striving for excellence, which aligns with promoting 'esprit de corps' - a sense of unity and camaraderie among group members. By working together and combining their efforts, the unit can enhance the quality of care they provide. This fosters a positive team spirit and encourages collaboration. The other options do not directly address the concept of 'esprit de corps' or the importance of unity and teamwork within the group.
5. Dendrites are finger-like extensions found on
- A. Muscle cells
- B. Connective tissue cells
- C. Neurons
- D. Epithelial cells
Correct answer: C
Rationale: Dendrites are the primary sites for receiving signals in a neuron. They are specialized extensions that branch out from the cell body of a neuron to receive incoming information from other neurons. These finger-like projections play a crucial role in transmitting electrical impulses and communication within the nervous system. Muscle cells, connective tissue cells, and epithelial cells do not have dendrites as they are not involved in neuronal communication.
6. An object is moving in a circle at constant speed. Is there a net force acting on it?
- A. Yes, always
- B. No, never
- C. Only if its speed is changing
- D. Only if its direction is changing
Correct answer: A
Rationale: Even though the speed is constant, the direction is constantly changing, requiring a centripetal force to keep the object moving in a circle.
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