Water is neutral and has a pH of _____.
a. 0
b. 1
c. 7
d. 14
Q. 2One type of chemical reaction that joins molecules together is called _____.
a. acidification
b. hydrolysis
c. condensation
d. compounding
Q. 3In the notation 3 C6H12O6, what does the three indicate?
a. The number of atoms contained in the molecule
b. The number of different atoms contained in the molecule
c. The number of molecules present
d. The number of different molecules present
Q. 4What are molecules composed of two or more different atoms called?
a. Ions
b. Bonds
c. Electrons
d. Compounds
Q. 5In the molecular formula C6H12O2, how many atoms of oxygen are present?
a. 1
b. 2
c. 6
d. 12
Q. 6Molecules are composed of atoms that are _____ joined together.
a. physically
b. electronically
c. chemically
d. automatically
Q. 7This is the chemical reaction that represents what usually happens when baking power reacts chemically while making a cake. This is an example of _____. NaAl(SO4)2 + 3 NaHCO3 Al(OH)3 + 2 Na2SO4 + 3 CO2
a. a change in pH
b. hydrolysis
c. a redox reaction
d. condensation
Q. 8Which of the following is one of the six most abundant elements in the human body?
a. Phosphorus
b. Iron
c. Zinc
d. Magnesium
Q. 9Elemental iron is composed of _____ atoms.
a. at least two different types of
b. no more than two different types of
c. no more than four different types of
d. several of the same
Q. 10The attractive force between atoms formed through the transfer or sharing of electrons is called _____.
a. a chemical bond
b. magnetism
c. a magnetic bond
d. chemistry
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