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62 notecards = 16 pages (4 cards per page)

Viewing:

Bonding

front 1

What is the formula for the compound formed by calcium and nitrogen?
A. CaN
B. Ca2N
C. Ca2N3
D. Ca3N2

back 1

D

front 2

What is the best description of the carbon-oxygen bond lengths in CO32–?
A. One short and two long bonds
B. One long and two short bonds
C. Three bonds of the same length
D. Three bonds of different lengths

back 2

C

front 3

What is the number of sigma () and pi () bonds and the hybridization of the carbon atom in:

back 3

A

front 4

Element X is in group 2, and element Y in group 7, of the periodic table. Which ions will be present in the compound formed when X and Y react together?
A. X+ andY– B. X2+ andY– C. X+ andY2– D. X2– andY+

back 4

B

front 5

Which of the following increase(s) for the bonding between carbon atoms in the sequence of
molecules C2H6, C2H4 and C2H2?
I. Number of bonds II. Length of bonds III. Strength of bonding
A. I only
B. I and III only
C. III only
D. I, II and III

back 5

B

front 6

Which of the following contain a bond angle of 90°?
I. PC14+ II. PCl5 III. PCl6–
A. I and II only
B. I and III only
C. II and III only
D. I, II, and III

back 6

C

front 7

Which allotropes contain carbon atoms with sp2 hybridization?
I. Diamond II. Graphite III. C60 fullerene
A. I and II only
B. I and III only
C. II and III only
D. I, II, and III

back 7

C

front 8

Based on electronegativity values, which bond is the most polar?
A.B―C
B.C―O
C.N―O
D.O―F

back 8

B

front 9

What is the Lewis (electron dot) structure for sulfur dioxide?

back 9

D

front 10

Which substance is most soluble in water (in mol dm–3) at 298 K?
A. CH3CH3
B. CH3OCH3
C. CH3CH2OH
D. CH3CH2CH2CH2OH

back 10

C

front 11

What is the molecular shape and the hybridization of the nitrogen atom in NH3?

back 11

D

front 12

Which statement about sigma and pi bonds is correct?
A. Sigma bonds are formed only by s orbitals and pi bonds are formed only by p orbitals.
B. Sigma bonds are formed only by p orbitals and pi bonds are formed only by s orbitals.
C. Sigma bonds are formed by either s or p orbitals, pi bonds are formed only by p orbitals.
D. Sigma and pi bonds are formed by either s or p orbitals.

back 12

C

front 13

According to VSEPR theory, repulsion between electron pairs in a valence shell decreases in the order
A. lone pair-lone pair > lone pair-bond pair > bond pair-bond pair.
B. bond pair-bond pair > lone pair-bond pair > lone pair-lone pair.
C. lone pair-lone pair > bond pair-bond pair > bond pair-lone pair.
D. bond pair-bond pair > lone pair-lone pair > lone pair-bond pair.

back 13

A

front 14

Which molecule is linear?
A.SO2
B.CO2
C.H2S
D.Cl2O

back 14

B

front 15

Why is the boiling point of PH3 lower than that of NH3?
A. PH3 is non-polar whereas NH3 is polar.
B. PH3 is not hydrogen bonded whereas NH3 is hydrogen bonded.
C. Van der Waals’ forces are weaker in PH3 than in NH3.
D. The molar mass of PH3 is greater than that of NH3.

back 15

B

front 16

Which molecule is non-polar?
A. H2CO
B. SO3
C. NF3
D. CHCl3

back 16

B

front 17

Consider the following statements.
I. All carbon-oxygen bond lengths are equal in CO32–.
II. All carbon-oxygen bond lengths are equal in CH3COOH.
III. All carbon-oxygen bond lengths are equal in CH3COO–.
Which statements are correct?
A. I and II only
B. I and III only
C. II and III only
D. I, II and III

back 17

B

front 18

What happens when sodium and oxygen combine together?
A. Each sodium atom gains one electron.
B. Each sodium atom loses one electron.
C. Each oxygen atom gains one electron.
D. Each oxygen atom loses one electron.

back 18

B

front 19

Which statement is correct about two elements whose atoms form a covalent bond with each other?
A. The elements are metals.
B. The elements are non-metals.
C. The elements have very low electronegativity values.
D. The elements have very different electronegativity values.

back 19

B

front 20

In ethanol, C2H5OH (l), there are covalent bonds, hydrogen bonds and van der Waals’ forces. Which bonds or forces are broken when ethanol is vaporized?
A. only hydrogen bonds
B. covalent bonds and hydrogen bonds
C. covalent bonds and van der Waals’ forces
D. hydrogen bonds and van der Waals’ forces

back 20

D

front 21

Which substance has the lowest electrical conductivity?
A. Cu(s)
B. Hg(l)
C. H2(g)
D. LiOH(aq)

back 21

C

front 22

Which statement best describes the attraction present in metallic bonding?
A. the attraction between nuclei and electrons
B. the attraction between positive ions and electrons
C. the attraction between positive ions and negative ions
D. the attraction between protons and electrons

back 22

B

front 23

Which statement is correct about multiple bonding between carbon atoms?
A. Double bonds are formed by two π bonds.
B. Double bonds are weaker than single bonds.
C. π bonds are formed by overlap between s orbitals.
D. π bonds are weaker than sigma bonds.

back 23

D

front 24

When the following bond types are listed in decreasing order of strength (strongest first), what is the correct order?
A. covalent > hydrogen > van der Waals’
B. covalent > van der Waals’ > hydrogen
C. hydrogen > covalent > van der Waals’
D. van der Waals’ > hydrogen > covalent

back 24

A

front 25

Which statement is true for most ionic compounds?
A. They contain elements of similar electronegativity.
B. They conduct electricity in the solid state.
C. They are coloured.
D. They have high melting and boiling points.

back 25

D

front 26

What is the valence shell electron pair repulsion (VSEPR) theory used to predict?
A. The energy levels in an atom
B.The shapes of molecules and ions
C. The electronegativities of elements
D. The type of bonding in compounds

back 26

B

front 27

Which fluoride is the most ionic?
A.NaF
B.CsF
C.MgF2
D. BaF2

back 27

B

front 28

Which particles can act as ligands in complex ion formation?
I. C1– II. NH3 III. H2O
A. I and II only
B. I and III only
C. II and III only
D. I, II and III

back 28

D

front 29

Which statements correctly describe the NO2– ion?
I. It can be represented by resonance structures.
II. It has two lone pairs of electrons on the N atom.
III. The N atom is sp2 hybridized.
A. I and II only
B. I and III only
C. II and III only
D. I, II and III

back 29

B

front 30

30. Which substance is most similar in shape to NH3?
A. GaI3
B. BF3
C. FeCl3
D. PBr3

back 30

D

front 31

31. Which statement is a correct description of electron loss in this reaction? 2Al + 3S -> Al2S3
A. Each aluminium atom loses two electrons.
B. Each aluminium atom loses three electrons.
C. Each sulfur atom loses two electrons.
D. Each sulfur atom loses three electrons.

back 31

B

front 32

Which molecule has the smallest bond angle?
A.CO2
B.NH3
C.CH4
D.C2H4

back 32

B

front 33

In which substance is hydrogen bonding present?
A. CH4
B. CH2F2
C. CH3CHO
D. CH3OH

back 33

D

front 34

Which is a correct description of metallic bonding?
A. Positively charged metal ions are attracted to negatively charged ions.
B. Negatively charged metal ions are attracted to positively charged metal ions.
C. Positively charged metal ions are attracted to delocalized electrons.
D. Negatively charged metal ions are attracted to delocalized electrons.

back 34

C

front 35

Which is the smallest bond angle in the PF5 molecule?
A. 90
B. 109.5
C. 120
D. 180

back 35

A

front 36

Which types of hybridization are shown by the carbon atoms in the compound CH2 = CH-CH3?
I. sp II. sp2 III. sp3
A. I and II only
B. I and III only
C. II and III only
D. I, II and III

back 36

C

front 37

What intermolecular forces are present in gaseous hydrogen?
A. Hydrogen bonds
B. Covalent bonds
C. Dipole-dipole attractions
D.Van der Waals’ forces

back 37

D

front 38

Which molecule is polar?
A. CO2
B. PF3
C. CH4
D. BF3

back 38

B

front 39

What are responsible for the high electrical conductivity of metals?
A. Delocalized positive ions
B. Delocalized valence electrons
C. Delocalized atoms
D. Delocalized negative ions

back 39

B

front 40

Which compound has the least covalent character?
A. SiO2
B. Na2O
C. MgCl2
D. CsF

back 40

D

front 41

Identify the types of hybridization shown by the carbon atoms in the molecule CH3CH2CH2COOH:
I. sp II. sp2 III. sp3
A. I and II only
B. I and III only
C. II and III only
D. I, II and III

back 41

C

front 42

When C2H4, C2H2 and C2H6 are arranged in order of increasing C–C bond length, what is the correct order?
A. C2H6, C2H2, C2H4
B. C2H4, C2H2, C2H6
C. C2H2, C2H4, C2H6
D. C2H4, C2H6, C2H2

back 42

C

front 43

Which compound contains both ionic and covalent bonds?
A. MgCl2
B. HCl
C. H2CO
D. NH4Cl

back 43

D

front 44

back 44

B

front 45

Which species has a trigonal planar shape?
A. CO3 2–
B. SO3 2–
C. NF3
D. PCl3

back 45

A

front 46

When C2H4, C2H2 and C2H6 are arranged in order of increasing C–C bond length, what is the correct order?
A. C2H6, C2H2, C2H4
B. C2H4, C2H2, C2H6
C. C2H2, C2H4, C2H6
D. C2H4, C2H6, C2H2

back 46

C

front 47

Which molecule is square planar in shape?
A. XeO4
B. XeF4
C. SF4
D. SiF4

back 47

B

front 48

back 48

B

front 49

What is the formula for an ionic compound formed between an element, X, from group 2 and an element, Y, from group 6?
A.XY
B.X2Y
C.XY2
D.X2Y6

back 49

A

front 50

In the molecules N2H4, N2H2, and N2, the nitrogen atoms are linked by single, double and triple bonds, respectively. When these molecules are arranged in increasing order of the lengths of their nitrogen to nitrogen bonds (shortest bond first) which order is correct?
A. N2H4, N2, N2H2
B. N2H4, N2H2, N2
C. N2H2, N2, N2H4
D. N2, N2H2, N2H4

back 50

D

front 51

The compounds listed have very similar molar masses. Which has the strongest intermolecular forces?
A. CH3CHO
B. CH3CH2OH
C. CH3CH2F
D. CH3CH2CH3

back 51

B

front 52

52. What is the shape of the CO32– ion and the approximate O–C–O bond angle?
A. Linear, 180
B. Trigonal planar, 90
C. Trigonal planar, 120
D. Pyramidal, 109

back 52

C

front 53

What is the molecular geometry and the Cl–I–Cl bond angle in the ICl4– ion? A. Square planar, 90
B. Square pyramidal, 90
C. Tetrahedral 109
D. Trigonal pyramidal 107

back 53

A

front 54

What is the geometry of the bonds around an atom with sp2 hybridization? A. 2 bonds at 180
B. 3 bonds at 120
C. 2 bonds at 90, 1 bond at 180
D. 4 bonds at 109

back 54

B

front 55

back 55

A

front 56

What is the formula of the compound formed when aluminium reacts with oxygen?
A. Al3O2
B. Al2O3
C. AlO2
D. AlO3

back 56

B

front 57

Which statement is true for compounds containing only covalent bonds?
A. They are held together by electrostatic forces of attraction between oppositely charged
ions.
B. They are made up of metal elements only.
C. They are made up of a metal from the far left of the periodic table and a non-metal from the far right of the periodic table.
D. They are made up of non-metal elements only.

back 57

D

front 58

How many electrons are used in the carbon-carbon bond in C2H2?
A. 4
B. 6
C. 10
D. 12

back 58

A

front 59

Which compound has the highest boiling point?
A. CH3CH2CH3
B. CH3CH2OH
C. CH3OCH3
D. CH3CHO

back 59

B

front 60

60. What type of solid materials are typically hard, have high melting points and poor electrical conductivities?
I. Ionic II. Metallic III. Covalent-network
A. I and II only
B. I and III only
C. II and III only
D. I, II and III

back 60

B

front 61

back 61

C

front 62

back 62

D