Which of these compounds would be ionic?
a. NO2
b. CCl4
c. LiF
d. H2S
[Ques. 2] A mineral that has a vitreous luster looks
a. glassy.
b. metallic.
c. earthy.
d. pearly.
[Ques. 3] A stream of a certain liquid compound is not attracted to an electrically charged rod. The compound is probably
a. metallic.
b. ionic.
c. nonpolar covalent.
d. polar covalent.
[Ques. 4] The color of the powder of a mineral is known as the mineral's
a. index of refraction.
b. hardness.
c. specific gravity.
d. streak.
[Ques. 5] Electronegativity increases ______________ across a period and ______________ in a group.
a. right to left; bottom to top
b. left to right; top to bottom
c. right to left; top to bottom
d. left to right; bottom to top
[Ques. 6] Which mineral is a hard and brittle silica that shows conchoidal fracture?
a. Feldspar
b. Quartz
c. Calcite
d. Mica
[Ques. 7] A stream of a certain liquid compound is attracted to an electrically charged rod. The compound is probably
a. metallic.
b. nonpolar covalent.
c. ionic.
d. polar covalent.
[Ques. 8] Which of the following is not one of the most common nonsilicate groups of minerals?
a. Sulfides
b. Oxides
c. Chlorides
d. Carbonates
[Ques. 9] In the liquid phase, covalent compounds generally conduct electricity
a. not at all.
b. very well.
c. better than metals.
d. better than ionic compounds in the liquid phase.
[Ques. 10] Orthoclase and plagioclase are the two main types of
a. silica.
b. feldspars.
c. calcite.
d. sulfides.
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