Answer:
D. all of the above
Explanation:
The water molecules have surrounded salt (NaCl) ions in the given diagram.
Salt get dissolve in water as both are polar, having positive and negative charges and both have electrical charges. Covalent bonds in water molecules are more stronger than the ionic bonds of salts, that is why salt dissolve in water.
Water molecules and salt molecules form electrostatic interaction in which the positively charges ends of water molecules are attracted to the negative chloride ions (Cl- ion) while negative ends of the water molecules are attracted to the positive sodium ion (Na+ ion).
Water molecule breaks the ionic bond between sodium and chloride ions. Water molecules form hydration shell around sodium (Na+) and calcium (Cl-) ions and allow the salt to dissolve in water and forma homogeneous solution.
Hence, the correct option is "D. All of the above".
Process that is not properly matched with its description is: external respiration: CO2 diffuses into the blood stream
Respiration is the process by which O2 and CO2 diffuse into the blood and get out of the blood (gas exchange occurs). There are two types of respiration:
1. External respiration - gas exchange between the external environment and the lungs. This is what we call breathing. So the example above is not external respiration.
2. Internal respiration - gas exchange between the cells of the body and the blood
