Which of the following properties of water explains its solvent abilities for certain substances?

A. Polarity of water molecules

B. High specific heat

C. High surface tension

D. Kinetic energy of liquid water molecules

Answer Explanation:

Water is a versatile solvent because it can dissolve many different kinds of substances. The reason for this is the polarity of water molecules, which means that they have a slight positive charge on one end and a slight negative charge on the other. This allows water molecules to attract and surround ions or polar molecules of other substances, forming hydration shells that separate them from each other.

Therefore, the Correct Answer is A.

Q #1: Which of the following is the approximate threshold value for mammalian neurons?

A. +35 mV

B. -55 mV

C. 0 mV

D. -80 mV

Answer Explanation

The approximate threshold value for mammalian neurons is -55mV.
Q #2: In a hypertonic solution, water flows through aquaporins embedded in the plasma membrane of the cell. This type of transport is best known as which of the following?

A. Osmosis

B. Diffusion

C. Facilitated diffusion

D. Active transport

Answer Explanation

One of the ways that cells regulate their water balance is by adjusting to different solute concentrations in their environment. When a cell is placed in a solution that has a higher concentration of solutes than the cell itself, the solution is called hypertonic. In this case, water will tend to move out of the cell through special channels called aquaporins, which are embedded in the plasma membrane. This movement of water across a selectively permeable membrane is a type of passive transport called osmosis. Osmosis does not require any energy input from the cell, unlike other forms of transport such as diffusion, facilitated diffusion, or active transport.
Q #3: Which of the following reasons explains why it is important for new scientific findings to be published?

A. Publishing findings will help scientists become more biased.

B. This prevents other scientists from performing similar tests.

C. Scientists will get paid if their findings are published.

D. Other scientists can validate or disprove the findings.

Answer Explanation

One of the essential aspects of scientific inquiry is the communication of results to peers and the public. Publishing new scientific findings allows other scientists to review, replicate, or challenge the methods and conclusions of a study. This way, science can advance by building on previous knowledge and correcting any errors or inconsistencies.

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Which of the following properties of water explains its solvent abilities for certain substances?

More Questions on TEAS 7 Science

Q #1: Which of the following is the approximate threshold value for mammalian neurons?

Answer Explanation

Q #2: In a hypertonic solution, water flows through aquaporins embedded in the plasma membrane of the cell. This type of transport is best known as which of the following?

Answer Explanation

Q #3: Which of the following reasons explains why it is important for new scientific findings to be published?

Answer Explanation

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