Chemistry for Physiology Discussion Questions

Chemistry for Physiology Discussion Questions
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Chemistry for Physiology Discussion Questions
1. The chemical formula C6H12O6 contains much information. However, what
information is NOT provided by the formula?
A. The number of atoms in a molecule
B. The name of the substance
C. The elements that make up the substance
D. Whether the substance is covalent or ionic
Answer is B: The name may be guessed at, but it is possible for two substances to
have the same formula but a different structure. Glucose and fructose both have this
formula.
2. Which of the particles listed below is the smallest?
A. An atom
B. A proton
C. An ion
D. A molecule
Answer is B: A proton is a subatomic particle so it is smaller than all of the others.
3. The chemical symbol for sodium is which of the following?
A. Na
B. So
C. K
D. Si
Answer is A: Na is short for natrium which is the Latin name for sodium.
4. A molecular compound may be defined by which of the following?
A. Atoms from non-metal elements covalently bonded
B. Atoms from metal elements covalently bonded
C. Atoms from metal elements and non-metal elements covalently bonded
Chemistry for Physiology Discussion Questions
D. Atoms from non-metal elements ironically bonded
Answer is A: Only non-metal elements are involved in covalent (molecular)
bonding.
5. Many drugs are neutralised to form salts and administered in this form. What is
the main advantage of administering the salt form of the drug? It is usually:
A. Less toxic
B. More soluble in water
C. More pleasant to taste
D. More soluble in lipid
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Answer is B: Salts, having particles that are electrically charged, are more likely to
be soluble in water.
6. One of the following is INCORRECT. Which one?
A. Metal atoms will form compounds with non-metal atoms.
B. Metal atoms will form compounds with metal atoms.
C. Non-metal atoms will form compounds with non-metal atoms.
D. Metal atoms will not form compounds with metal atoms.
Answer is B: Metal atoms can only form (ionic nonmolecular) compounds with
non-metal atoms.
7. Choose the correct statement about hydrogen bonds. They:
A. Are stronger than covalent bonds
B. Act between the H in one –OH or –NH group and the O or N in another
C. Operate within molecules
D. Act between the H in one –OH or –NH group and the H in another
Answer is B: The slightly positive H atom in one molecule is attracted to the adjacent slightly negative O (or N).
8. Given that the atomic mass of nitrogen is 14 and that of hydrogen is 1, what is
the mass in grams of 1 mole of ammonia (NH3)?
A. 15
B. 16
C. 17
D. 18
Answer is C: From the formula, there is one N and three H atoms. So (1×14)
(3×1) = 17.
9. Choose the ending that will correctly complete the sentence: When atoms of a
metal element and atoms of a non-metal element react, the result is:
A. A covalent compound consisting of molecules
B. A covalent compound consisting of ions
C. An ionic compound consisting of ions in a lattice
D. An ionic compound consisting of molecules in a lattice
Answer is C: Atoms of a metal element react with atoms of a non-metal element to
form an ionic compound (ions held within a lattice when in solid form).
10. In a water molecule, the bond between oxygen (O) and hydrogen (H) is:
A. A covalent bond and a polar bond
B. An ionic bond
C. A covalent bond
D. An ionic bond and forms an electrolyte
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