HESI A2
HESI A2 Chemistry Questions
1. What type of bond is present in sodium chloride?
- A. Covalent
- B. Ionic
- C. Metallic
- D. Hydrogen
Correct answer: B
Rationale: Ionic bonds are found in sodium chloride. In an ionic bond, one atom donates an electron to another atom, resulting in the formation of positively and negatively charged ions that are held together by electrostatic forces of attraction. Sodium chloride is a classic example of an ionic compound, where sodium (Na) donates an electron to chlorine (Cl), forming Na+ and Cl- ions that are attracted to each other, creating a crystal lattice structure. Covalent bonds involve the sharing of electron pairs between atoms, which is not the case in sodium chloride. Metallic bonds occur in metals where electrons are delocalized and shared across a lattice, unlike the specific transfer seen in ionic bonds. Hydrogen bonds are a type of intermolecular force, not the primary bond type present in sodium chloride.
2. What does the word 'principally' mean?
- A. Mostly
- B. Clearly
- C. In our opinion
- D. Royally
Correct answer: A
Rationale: The correct answer is A: 'Mostly.' The word 'principally' means mainly or mostly. It is used to describe something that is primarily or predominantly true in a given context. Choice B, 'Clearly,' is incorrect as it does not reflect the primary meaning of the word. Choice C, 'In our opinion,' is incorrect as it does not capture the essence of 'principally.' Choice D, 'Royally,' is incorrect as it does not align with the definition of the word.
3. Replete is best defined as being ___________.
- A. hardy
- B. quiet
- C. full
- D. sad
Correct answer: C
Rationale: Replete means filled to the utmost capacity or complete in every detail. Therefore, the best definition of replete from the given choices is 'full.' Choice A, 'hardy,' does not accurately reflect the meaning of replete. Choice B, 'quiet,' is unrelated to the definition of replete. Choice D, 'sad,' is also not synonymous with the term replete.
4. Which part of the brain is responsible for processing sensory information?
- A. Frontal lobe
- B. Parietal lobe
- C. Occipital lobe
- D. Temporal lobe
Correct answer: B
Rationale: The parietal lobe of the brain is responsible for processing sensory information such as touch, temperature, and pain. It integrates sensory information from various parts of the body, allowing an individual to perceive and respond to different stimuli. Functions like spatial awareness and perception of the body's position in space are also associated with the parietal lobe. The frontal lobe is responsible for functions like decision-making and personality. The occipital lobe is primarily involved in visual processing, and the temporal lobe plays a role in memory and auditory processing.
5. What is the definition of the word ENVIRONMENT?
- A. the major ideas of the quality of life
- B. the assistance found outside the family
- C. the elements inside and outside of a person
- D. the positive and negative aspects of a home
Correct answer: C
Rationale: The word 'environment' refers to the surroundings or conditions in which a person, animal, or plant lives or operates. It encompasses the elements both inside and outside of an individual, including physical, biological, social, and cultural factors. Option C, which mentions the elements inside and outside of a person, is the most accurate description of the word 'environment.' Choices A, B, and D do not capture the comprehensive nature of the term 'environment' and are therefore incorrect.
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