ATI TEAS 7
Chemistry
1. Which of the following is an example of a salt?
- A. Sodium hydroxide (NaOH)
- B. Hydrochloric acid (HCl)
- C. Sodium chloride (NaCl)
- D. Sulfuric acid (Hâ‚‚SOâ‚„)
Correct answer: c
Rationale: Sodium chloride is an example of a salt. The other choices are either bases or acids.
2. The longest bone in the human body is the:
- A. Tibia
- B. Fibula
- C. Femur
- D. Humerus
Correct answer: C
Rationale: The correct answer is C: "Femur." The femur is the longest bone in the human body, located in the thigh region and connecting the hip to the knee. It plays a crucial role in supporting the body's weight and facilitating movement. The tibia and fibula are bones in the lower leg, while the humerus is a bone in the upper arm. Therefore, the femur is the correct answer for the longest bone in the human body.
3. The electrical conductivity of a strong acid solution is higher than that of a weak acid solution because:
- A. Strong acids are more concentrated.
- B. Strong acids release more hydrogen ions
- C. Weak acids are better at dissolving salts.
- D. Strong acids have a lower pH.
Correct answer: B
Rationale: Strong acids completely dissociate, leading to a h
4. What is the SI unit of measurement for momentum?
- A. Newton (N)
- B. Kilogram-meter per second (kg·m/s)
- C. Joule (J)
- D. Newton-second (N·s)
Correct answer: b
Rationale: Momentum is measured in kilogram-meter per second (kg·m/s).
5. Which of the following is an example of a polymer?
- A. Methane
- B. Ethanol
- C. Polyethylene
- D. Acetic acid
Correct answer: C
Rationale: Polyethylene is a polymer, consisting of a large number of repeating ethylene units. The other choices represent small organic compounds.
6. What type of reaction is represented by the following equation: Fe2O3 (s) + 3H2 (g) -> 2Fe (s) + 3H2O (g)
- A. Combustion
- B. Decomposition
- C. Single displacement
- D. Redox reaction
Correct answer: D
Rationale: The given equation involves a transfer of electrons from iron oxide (Fe2O3) to hydrogen gas (H2), resulting in the formation of iron (Fe) and water (H2O). This transfer of electrons indicates a redox reaction, where oxidation and reduction occur simultaneously. In this case, iron is reduced from a higher oxidation state in Fe2O3 to a lower oxidation state in Fe, while hydrogen is oxidized from its elemental state in H2 to form water. Therefore, the correct answer is D: Redox reaction.
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