AnswersChemistryChemical Bonds and Compounds

Chemical Bonds and Compounds — Test Answers

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In water, HNO sub 3 produces cap h raised to the plus power ions. Which is the name for HNO sub 3 in an aqueous solution?

A
saltpetre
B
hydrogen nitrate
C
nitrous acid
D
nitric acid
2
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Which is the Lewis structure for cap h sub 3 PO sub 4 ?

A
Image with description A central upper P is double bonded to an O above, and single-bonded to an upper O single-bonded to an upper H to the left and the right. The O above the P has three pairs of electron dots, to the left, above, and to the right; the O's to the right and left have pairs of dots above and below.
B
Image with description A central upper P is bonded to an upper H above, an upper O below, and upper O's bonded to upper H's to the left and the right. The O below the P has three pairs of electron dots, to the left, right, and below; the other two O's have pairs of dots above and below. A central upper P is double bonded to an O above, and single-bonded to an upper O single-bonded to an upper H to the left and the right. The O above the P has three pairs of electron dots, to the left, above, and to the right; the O's to the right and left have pairs of dots above and below.
C
Image with description A central upper P is single bonded left, right, above, and below to upper Os. The O above the P is single bonded to upper H on the left and the right, and has two electron dots above it. The O below the P is single bonded to an H below, and has pairs of electron dots to the left and right.
D
Image without description
3

What is the ratio of Al raised to the 3 plus power ions to cap s raised to the 2 minus power ions in a neutral compound?

A
ratio of 2 to 3
B
ratio of 1 to 1
C
ratio of 3 to 2
D
ratio of 2 to 1
4

An element has six valence electrons available for bonding. Which group of the periodic table does this element most likely belong to?

A
group 16
B
group 4
C
group 18
D
group 2
5

Which formula represents the compound commonly known as phosphine with IUPAC name phosphorus trihydride?

A
PH
B
PH sub 2
C
PH sub 3
D
PH sub 4
6

When applied to a dish, soap makes grease soluble in water. Which explanation correctly supports the role of intermolecular forces in this common observation?

A
The polar soap molecule attaches itself to the dish.
B
The nonpolar end of a soap molecule attaches itself to grease.
C
The nonpolar end of a soap molecule attaches itself to water.
D
The polar soap molecule attaches itself to a nonpolar soap molecule.
7

Which of the compounds would be expected to have the strongest ionic bonds?

A
the compound that has the largest ions with the least charge
B
the compound that has the largest ions with the greatest charge
C
the compound that has the smallest ions with the greatest charge
D
the compound that has the smallest ions with the least charge
8

Which is composed of alkenes?

A
propane gas
B
degreaser containing hexane
C
polystyrene cups
D
welding torch fuel
9

Among the intermolecular forces, which forces are typically the weakest?

A
London dispersion forces
B
dipole-induced dipole interactions
C
hydrogen bonds
D
dipole-dipole interactions
10

Which are long chains formed by the process of polymerization?

A
ethylenes
B
DNA strands
C
monomers
D
subunits
11

Which refers to a macromolecule that forms as a result of the joining of multiple monomers?

A
nucleic acid
B
polymer
C
amino acid
D
glucose
12

Which statement best describes the effect of low ionization energies and low electronegativities on metallic bonding?

A
The valence electrons are easily delocalized.
B
The valence electrons break free of the crystals.
C
The valence electrons stay in a single orbital.
D
The valence electrons move closer to the nuclei.
13

What is the name of the ionic compound CaO ?

A
calcium(II) oxide
B
calcium(I) oxide
C
calcium oxide
D
calcium oxygen
14

Which reason best explains why metals are shiny?

A
because their valence electrons move to higher energy levels
B
because their valence electrons oscillate between bands
C
because their valence electrons reflect light
D
because their valence electrons absorb light
15

Lewis structures cannot

A
show the location of bonds.
B
show the number of valence electrons.
C
show how many bonds are present in a molecule.
D
show the strength of bonds.
16

Which is the name for SiO sub 2 ?

A
silicon dioxide
B
monosilicon oxide
C
disilicon dioxygen
D
silicon trioxygen
18

Which compound has the highest melting point?

A
cap c sub 8 cap h sub 18
B
Al sub 2 open paren CO sub 3 close paren sub 3
C
cap c sub 12 cap h sub 22 cap o sub 11
D
cap h sub 2 cap o
19

Which statement is true about ionic compounds?

A
Ionic compounds are very easy to bend.
B
Ionic compounds have very low melting points.
C
Solid ionic compounds are good conductors of electricity.
D
Ionic compounds have varying solubilities in water.
20

Which activity most likely involves the direct use of saturated hydrocarbons?

A
bending steel by hand
B
dissolving salt in water
C
carving stone with hammer and chisel
D
burning natural gas
21

What is the name of this hydrocarbon?

A
2-methylpropane
B
1-methylbutane
C
3-methylpropane
D
2-methylbutane

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