Glass is ________ whereas quartz is ________.
A) hard, soft
B) crystalline, amorphous
C) amorphous, crystalline
D) pure SiO2, a mixture of SiO2 and carbonates
E) breakable, not breakable
Correct Answer:
Verified
Q100: The dissolution of 1.0 mol of _
Q105: The oxidation state of silicon in SiO44-
Q109: What is the oxidation state of carbon
Q110: The correct name for the BH4- ion
Q111: Diborane is _.
A)B10H14
B)B2O3
C)BH3
D)B2H6
E)H3BO3
Q114: Which group 3A element is a metalloid?
A)B
B)Al
C)Ga
D)In
E)Tl
Q115: What is the formula of borax?
A)H3BO3
B)H2B4O7
C)P5O8
D)B2O3
E)Na2B4O7 ∙
Q116: The disilicate ion is _.
A)Si2O88-
B)Si2O76-
C)Si2O84-
D)Si2O86-
E)Si2O72-
Q117: SiO44- is the _ ion.
A)orthosilicate ion
B)silicide ion
C)thiosilicate
Q119: Boric oxide is _.
A)B2O
B)BO2
C)BO
D)B2O3
E)B2O4
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