Ammonia, NH3, boils at a higher temperature than phosphine, PH3 . This is probably due to
a. ammonia being more dense than PH3.
b. ammonia having the lower formula mass.
c. hydrogen bonding among the NH3 molecules.
d. ammonia being ionic and phosphine being covalent.
[Ques. 2] The study of rocks is called
a. petrology.
b. mineralogy.
c. paleontology.
d. geology.
[Ques. 3] A hydrogen bond can be formed between
a. an atom of H and one of C, P, or Cl in the same molecule.
b. an H atom in one molecule and an O, F, or N atom in another.
c. an atom of H in one water molecule and an atom of H in another.
d. the H atoms in H2 molecules.
[Ques. 4] James Hutton formulated the concept of
a. catastrophism.
b. superposition.
c. plate tectonics.
d. uniformitarianism.
[Ques. 5] In which of the following compounds would hydrogen bonding not be expected among the molecules?
a. NH3
b. CH4
c. H2O
d. HF
[Ques. 6] Which of the following scientists is generally designated the father of geology?
a. Friedrich Mohs
b. James Hutton
c. Alfred Wegener
d. Edwin Hubble
[Ques. 7] In chlorine gas, the bond between the two chlorine atoms is
a. ionic.
b. single covalent.
c. triple covalent.
d. double covalent.
[Ques. 8] A cohesive aggregate of one or more minerals is called a
a. crystal.
b. gem.
c. silicate.
d. rock.
[Ques. 9] A water molecule is
a. angular and nonpolar.
b. linear and polar.
c. linear and nonpolar.
d. angular and polar.
[Ques. 10] The brilliancy of a gem is a function of its
a. index of refraction.
b. index of reflection.
c. size.
d. luster.
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