NURSING EXAM QUESTIONS
BIOCHEMISTRY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Water molecules stick together by cohesion.
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Frozen water is less dense than liquid water.
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Water molecules stick to other polar substances.
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Hydrogen bonds allow water to heat and cool very quickly.
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Detailed explanation-1: -Water has the ability to hydrogen bonds with other molecules. So, the correct answer is, ‘It becomes denser when it freezes’.
Detailed explanation-2: -Which of the following is not a property of water that results from hydrogen bonding? Water has a high surface tension.
Detailed explanation-3: -Water has the unique ability to dissolve many polar and ionic substances. This is important to all living things because, as water travels through the water cycle, it takes many valuable nutrients along with it!
Detailed explanation-4: -Water is the universal solvent. Exists in nature as a solid, liquid, and gas. The density of ice is less than liquid water. Water has a high heat of vaporization. More items •23-Sept-2021