Chemistry and Chemical Bonds for Nursing School Entrance Exam Practice Problems

The study guide for these practice questions can be found at:

Chemistry and Chemical Bonds for Nursing School Entrance Exam Study Guide

Questions

1. The bond between oxygen and hydrogen atoms in a water molecule is
   1. a hydrogen bond.
   2. a polar covalent bond.
   3. a nonpolar covalent bond.
   4. an ionic bond.
2. Which of the following is a nonpolar covalent bond?
   1. the bond between two carbons
   2. the bond between sodium and chloride
   3. the bond between two water molecules
   4. the bond between nitrogen and hydrogen
3. The type of bond formed between two molecules of water is a
   1. polar covalent bond.
   2. hydrogen bond.
   3. nonpolar covalent bond.
   4. peptide bond.
4. Which of the following lists contains the formulas for these ions, in the order given: ammonium, silver, bicarbonate/hydrogen carbonate, nitrate, calcium, fluoride?
   1. Am^–, Si⁺⁺, HCO₃^–, NA⁺, CM^–, F⁺
   2. AM⁺, Ag⁺, CO₃^2–, NO₃^–, Cal⁺, Fl^–
   3. NH₄^–, Ag⁺, HCO₃^–, NO3–, Cal⁺, Fl^–
   4. NH₄⁺, Ag⁺, HCO₃^–, NO₃^–, Ca²⁺, F^–
5. If X (atomic number 4) and Y (atomic number 17) react, the formula of the compound formed will be
   1. XY₂.
   2. YX₂.
   3. X₂Y₂.
   4. XY₄.
6. To acquire an outer octet, an atom of element 19 has to
   1. lose one electron (and acquire a charge of +1).
   2. lose two electrons (and acquire a charge of +2).
   3. gain one electron (and acquire a charge of –1).
   4. gain two electrons (and acquire a charge of –2).
7. The most common ions of the elements of group VIIA have electrical charges of
   1. +7.
   2. –7.
   3. +1.
   4. –1.
8. Which of the following is true according to the octet rule?
   1. Ions of all Group IIA elements have electron configurations that conform to those of the noble gases and have charges of +1.
   2. The reactions of the active atoms of the representative elements of the periodic table generally lead to noble gas configurations.
   3. An ion of a metallic element that has lost electrons to achieve noble gas configuration is less active than an atom of the same element.
   4. The most reactive elements are generally those whose atoms are nearest, but not equal, to noble gas configurations.
9. Electron transfer is best described as a process
   1. by which ionic compounds are formed from atoms of their elements.
   2. in which a covalent bond is made.
   3. that occurs between two nonmetals.
   4. that occurs between two metals.
10. How many electrons do the following have in their outer levels: S^2–, Na⁺, Cl^–, Ar, Mg²⁺, and Al³⁺?
    1. three
    2. five
    3. seven
    4. eight