#water properties

Chemical Bonding

Why is Hâ‚‚O a liquid at room temperature while Hâ‚‚S is a gas?

Hâ‚‚O can form hydrogen bonds, but Hâ‚‚S cannot is the scientifically accurate answer to this question. Within the study of Chemical Bonding, this concept is well-established through extensive research and is documented in standard scientific literature. The specific properties, mechanisms, or characteristics of Hâ‚‚O can form hydrogen bonds, but Hâ‚‚S cannot directly address what is being asked. Among the other options, Hâ‚‚O has larger molecular size, Hâ‚‚S is non-polar, and Hâ‚‚S has stronger Van der Waals interactions do not correctly answer this question because they either refer to different concepts, describe properties of other molecules or processes, or represent common misconceptions about this topic.

Ref: Campbell Biology, Urry et al., 12th Ed.

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Chemical Bonding

The dielectric constant of water is approximately:

78.5 is the scientifically accurate answer to this question. Within the study of Chemical Bonding, this concept is well-established through extensive research and is documented in standard scientific literature. The specific properties, mechanisms, or characteristics of 78.5 directly address what is being asked. Among the other options, 1, 20, and 50 do not correctly answer this question because they either refer to different concepts, describe properties of other molecules or processes, or represent common misconceptions about this topic.

Ref: Campbell Biology, Urry et al., 12th Ed.

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Chemical Bonding

The strongest type of intermolecular force in water (Hâ‚‚O) is:

Hydrogen bonding is the accurate classification or categorization for the organism, molecule, or concept described in this question. In Chemical Bonding, proper classification is based on shared characteristics including morphological, biochemical, genetic, and evolutionary criteria. Hydrogen bonding meets the specific diagnostic features and defining criteria that distinguish it from related groups. The other options (Van der Waals forces, Ionic bonding, and Metallic bonding) belong to different taxonomic groups, represent different classification levels, or possess distinct characteristics that exclude them from this category.

Ref: Campbell Biology, Urry et al., 12th Ed.

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Water and Mole Concept

What is the primary reason for water’s high boiling point?

Presence of hydrogen bonds accurately defines or describes the concept asked in this question. Within Water and Mole Concept, precise definitions and terminology are essential for clear scientific communication. The other options (High molecular weight, High electronegativity of hydrogen, and Low surface tension) either describe related but distinct concepts, use incorrect terminology, or confuse similar-sounding terms that have different scientific meanings. A thorough understanding of exact definitions helps distinguish between closely related biological concepts and is crucial for competitive examinations.

Ref: Lehninger Principles of Biochemistry, Nelson & Cox, 8th Ed., Ch. 2

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