Practice Exams ChE - 1

1. Which of the following is insoluble in H20?
a. aluminum sodium silicate
b. aluminum sulfate
c. ammonium oxalate
d. ammonium bromide

2. A compound is found to contain by mass: 22.79% C, 1.42% H and 75.9% Br. What is the molecular formula of the compound if its molecular weight is 422?
a. C4H6Br4
b. C2H3Br2
c. ???
d. ???

3. Defines a base as a compound that dissolves in water to produce OH- is
a. Arrhenius
b. Bronsted-Lowry
c. Lewis
d. ???

4. Defines an acid as a compound that dissolves in water to produce H+ ions is
a. Arrhenius
b. Bronsted-Lowry
c. Lewis
d. ???

5. One gmole of a species is that weight of the species equal to its
a. molecular weight
b. atomic mass
c. ???
d. ???

6. Arrange Ca, Be and Mg according to increasing size
a. Ca < Mg < Be
b. Be < Mg < Ca
c. Ca < Be < Mg
d. Mg < Ca < Be

7. Arrange Ca, Be and Mg according to increasing ionization energy
a. Be < Mg < Ca
b. Mg < Ca < Be
c. Ca < Mg < Be
d. Ca < Be < Mg

8. Arrange Ca, Be and Mg according to increasing electron affinity
a. Mg < Ca < Be
c. Ca < Be < Mg
c. Be < Mg < Ca
d. Ca < Mg < Be

9. 19.6 grams of Carbon Disulfide is reacted with excess oxygen to form carbon dioxide and sulfur dioxide. What is the amount of sulfur dioxide formed?
a. 32 grams
b. ???
c. ???
d. ???

10. The ionization constant of NH4 OH is 1.8 x 10-5. What is the formality of a solution of NH4OH which is 1.3% ionized?
a. 0.10
b. ???
c. ???
d. ???