IBSL Chemistry Topic 4 Bonding Multiple Choice Questions
- 1.Which compound contains bith covalent and ionic bonds? Sodium carbonate magnesium bromide dichloromethane ethanoic acid
- A.
Sodium carbonate
- B.
Magnesium bromide
- C.
Dichloromethane
- D.
Ethanoic acid
- 2.Which pair of elements is most likely to form a covalently bonded compound?
- A.
Li and Cl
- B.
Ca and S
- C.
P and O
- D.
Zn and Br
- 3.Given the following electronegativities, which bond would be the most polar? H: 2.2 N: 3.0 O: 3.5 F: 4.0
- A.
O-H in H2O
- B.
N-O in NO2
- C.
N-F in NF2
- D.
N-H in NH3
- 4.When
- A.
CH4, NH3, H2O
- B.
NH3, CH4, H2O
- C.
NH3, H2O, CH4
- D.
H2O, NH3, CH4
- 5.When the H-N-H bond angles in the species NH2-, NH3 and NH4+ are arranged in order of increasing bond angle (smallest bond angle first), which order is correct?
- A.
NH2- < NH3 < NH4+
- B.
NH4+ < NH3 < NH2-
- C.
NH3 < NH2- < NH4+
- D.
NH2- < NH4+ < NH3
- 6.In which of the following pairs does the second substance have the lower boiling point?
- A.
F2, Cl2
- B.
C2H6, C3H8
- C.
H2O, H2S
- D.
CH3OCHE, CH3CH2OH
- 7.In which of the following substances would hydrogen bonding be expected to occur?
- A.
II only
- B.
I and III only
- C.
I and II only
- D.
I, II and III
- 8.Which one of the following statement is correct?
- A.
The energy absorbed when liquid ammonia boils is used to overcome the covalent bond within the ammonia molecule
- B.
The energy absorbed when solid phosphorus (P4) melts is used to overcome the ionic bonds between the phosphorus molecules
- C.
The energy absorbed when sodium chloride dissolves in water is used to form ions
- D.
The energy absorbed when copper metal melts is used to overcome the non-directional metallic bonds between the copper atoms
- 9.A solid has a melting point of 1440 degrees celsius. It conducts heat and electricity. It does not dissolve in water or in organic solvents. The bond between the particles is most likely to be
- A.
Covalent
- B.
Ionic
- C.
Dipole:dipole
- D.
Metallic
- 10.Whicn molecule is linear?
- A.
SO2
- B.
CO2
- C.
H2S
- D.
Cl2O
- 11.Why is the boiling point of PH3 lower than that of NH3?
- A.
PH3 is non-polar whereas NH2 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
- 12.Element X is in Group 2 and element Y is in Group 7, of the periodic table. Which ions will be present in the compound formed when X and Y react together?
- A.
X+ and Y-
- B.
X+ and Y-
- C.
X2+ and Y-
- D.
X2- and Y+
- 13.How do bond length and bond strength change as the number of bonds between two atoms increases?
- A.
Bond length increases and bond strength increases
- B.
Bond length increases and bond strength decreases
- C.
Bond length decreases and bond strength increases
- D.
Bond length decreases and bond strength decreases
- 14.Which of the following is true for CO2?
- A.
C=O bond is polar and CO2 molecule is non-polar
- B.
C=O bond is non-polar and CO2 molecule is polar
- C.
C=O bond is polar and CO2 molecule is polar
- D.
C=O bond is non-polar and CO2 molecule is non-polar
- 15.The molar masses of C2H6, CH3OH and CH3F are very similar. How do theur boiling points compare?
- A.
C2H
- B.
CH3F
- C.
CH3OH
- D.
C2H6
- 16.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 colored
- D.
They have high melting and boiling point
- 17.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
- 18.Which substance is most soluble in water (in mol dm-3) at 298K?
- A.
CH3CH3
- B.
CH3OCH3
- C.
CH3CH2OH
- D.
CH3CH2CH2CH2OH
- 19.What is the valence shell eectron 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 an compound
- 20.Which substance has the lowest electrical conductivity?
- A.
Cu(s)
- B.
Hg(l)
- C.
H2(g)
- D.
LiOH(aq)
- 21.Which molecule is non-polar?
- A.
H2CO
- B.
SO3
- C.
NF3
- D.
CHCl3
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