Chapter 6: The shape of molecules
In which of the three phases of matter would expect hydrogen bonding between water molecules to be the strongest A) liquid phase (H2O Os more seperate did than solid phase) B) gas phase (H2O Os much gather apart than liquid phase) C) solid phase (H2O Os very close together) D) it is equally strong in all three phases
?
Which of the following pictures best illustrates a tetrahedral shape for the fictional molecule AB4?
A)
The angle around carbon in hydrogen cyanide is A) 180 B) 109 C) 120 D) 105
A) 180
carbon disulfide A) 180 degrees B) close to 120 degrees C) close to 109 degrees D) 120 degrees E) 109 degrees
A) 180 degrees
In a molecule having four pairs of electrons around the center atom and a bent shape, how many bonding pairs does the central atom have? A) 2 B) 1 C) 3 D) 4
A) 2
Which compound listed below would you expect to have the greatest H-C-H bond angle? A) CH2O B) CH2CI2 C) CH2CIF D) CH4
A) CH20
Which of the following will be the least soluble in water A) CH4 B) NH3 C) CH3CH2OH D) CH3OH
A) CH4
NH2- A) bent B) pyramidal C) linear D) trigonal planar
A) bent
What is the molecular shape of H2S A) bent B) pyramidal C) tetrahedral D) linear
A) bent
Which of the following molecules is not linear? A) boron trifluoride B) acetylene, C2H2 C) hydrogen cyanide D) beryllium chloride
A) boron trifluoride
Br2 A) non-polar B) polar
A) non-polar
C2H2 A) non-polar B) polar
A) non-polar
CO2 A) non-polar B) polar
A) non-polar
CS2 A) non-polar B) polar
A) non-polar
H2C=CH2 A) non-polar B) polar
A) non-polar
H2S A) non-polar B) polar
A) non-polar
SO3 A) non-polar B) polar
A) non-polar
Ethylene, C2H4 A) trigonal planar B) pyramidal C) linear D) bent
A) trigonal planar
What is the molecular shape of NO3- A) trigonal planar B) pyramidal C) linear D) tetrahedral
A) trigonal planar
CH3OCH3 A) undergoes hydrogen bonding with water B) does not undergo hydrogen bonding
A) undergoes hydrogen bonding with water
CH3OH A) undergoes hydrogen bonding with water B) does not undergo hydrogen bonding
A) undergoes hydrogen bonding with water
H2C=O A) undergoes hydrogen bonding with water B) does not undergo hydrogen bonding
A) undergoes hydrogen bonding with water
NH2OH A) undergoes hydrogen bonding with water B) does not undergo hydrogen bonding
A) undergoes hydrogen bonding with water
NH3 A) undergoes hydrogen bonding with water B) does not undergo hydrogen bonding
A) undergoes hydrogen bonding with water
Which of the following is bent with 105 degree bond angle? A) water B) sulfur dioxide C) carbon dioxide D) ammonia
A) water
The angle around nitrogen in the ammonium ion is A) 120 B) 109 C) 60 D) 90
B) 109
What is the steric number (# of electron groups) in the central atom in carbon disulfide A) 1 B) 2 C) 3 D) 4
B) 2
In a molecule having four pairs of electrons around the central atom and a pyramidal shape, how many bonding pairs of electrons does the central atoms have? A) 1 B) 3 C) 4 D) 2
B) 3
Which compound listed below has a bond angle of 180 degrees around the central atom? A) CC14 B) CO2 C) H2O D) NH3
B) CO2
Which of the following sulfur containing species is not polar A) SOCl2 B) SO3 C) HS- D) F2S
B) SO3
Which of the following multiple bond compounds is polar A) O2 B) SOCl2 C) CO2 D) N2
B) SOCl2
Sulfur dioxide A) 180 degrees B) close to 120 degrees C) close to 109 degrees D) 120 degrees E) 109 degrees
B) close to 120 degrees
C3H8 A) undergoes hydrogen bonding with water B) does not undergo hydrogen bonding
B) does not undergo hydrogen bonding
CH4 A) undergoes hydrogen bonding with water B) does not undergo hydrogen bonding
B) does not undergo hydrogen bonding
CH3Cl A) non-polar B) polar
B) polar
HC1 A) non-polar B) polar
B) polar
PCl3 A) non-polar B) polar
B) polar
CH3- A) bent B) pyramidal C) linear D) trigonal planar
B) pyramidal
Phosphorous trihydride A) trigonal planar B) pyramidal C) linear D) bent
B) pyramidal
3) Which of the following pictures best illustrates a tetrahedral shape for the fictional molecule AB4?
C)
Which of the following bonds will have the smallest difference in electronegativity? A) HBr B) HS- C) H2 D) BaF
C) H2
Dipole dipole forces are an important factor to consider in determining whether or not a substance will dissolve in water ( a molecule which has a dipole). Which of the following compounds would you expect to be the most soluble in water A) CCl4 B) CO2 C) NH3 D) N2
C) NH3
Ammonia A) 180 degrees B) close to 120 degrees C) close to 109 degrees D) 120 degrees E) 109 degrees
C) close to 109 degrees
Water A) 180 degrees B) close to 120 degrees C) close to 109 degrees D) 120 degrees E) 109 degrees
C) close to 109 degrees
Acetylene, C2H2 A) trigonal planar B) pyramidal C) linear D) bent
C) linear
HC2- A) bent B) pyramidal C) linear D) trigonal planar
C) linear
Hydrogen fluoride A) trigonal planar B) pyramidal C) linear D) bent
C) linear
Which of the following is bent and has an angle close to 118 degrees around the central atom? A) boron trifluoride B) ammonia C) sulfur dioxide D) both A and C
C) sulfur dioxide
Sulfur trioxide A) 180 degrees B) close to 120 degrees C) close to 109 degrees D) 120 degrees E) 109 degrees
D) 120 degrees
boron trifluoride A) 180 degrees B) close to 120 degrees C) close to 109 degrees D) 120 degrees E) 109 degrees
D) 120 degrees
What is the steric number (# of electron groups) of the central atom in CH4? A) 1 B) 2 C) 3 D) 4
D) 4
Which of the following compounds contains bonds that are the most polar (greatest electronegativity difference between hydrogen and the central atom)? A) H2Se B) H2Te C) H2S D) H2O
D) H2O
Which of the following is non-polar A) ethene, C2H4 B) acetylene, C2H2 C) methane D) all the above are non-polar
D) all the above are non polar
Which of the following statements is correct about the pyramidal structure? A) it is the shape of the ammonia molecule B) it has angles around the central atom very close to 109 degrees C) it is very similar to the tetrahedral structure except that a lone pair of electrons in the pyramidal structure replaces a bond in the tetrahedral one D) all the above statements are correct
D) all the above statements are correct.
Sulfur dioxide A) trigonal planar B) pyramidal C) linear D) bent
D) bent
Which of the following is bent? A) water B) sulfur dioxide C) carbon dioxide D) both A and B
D) both A and B
CH3+ A) bent B) pyramidal C) linear D) trigonal planar
D) trigonal planar
HCO3- A) bent B) pyramidal C) linear D) trigonal planar
D) trigonal planar
Ammonium ion A) 180 degrees B) close to 120 degrees C) close to 109 degrees D) 120 degrees E) 109 degrees
E) 109 degrees
All of the following SO2, HC1, CO2 are linear True or False
False
Bonds are regions of negative charge and therefore repel each other True or False
False
Carbon tetrachloride contains polar bonds and is a polar molecule True or False
False
When drawing the three dimensional structure diagram of a molecule the bold line goes back behind the page True or False
False
When naming the shape of a molecule count the lone pairs True or false
False
All of the following SO3, CO2, CS2 are non-polar True or False
True
Carbon dioxide contains polar bonds and is a non-polar molecule True or False
True
In the VSEPR model the multiple bond is treated as a single electron group, just the way a single bond is treated True or False
True
One can say with certainty that the pyramidal structure is the tetrahedral arrangement minus a bond but with a lone pair True or false
True
The angle around the central atom in the pyramidal structure is very close to that of the tetrahedral one? True or False
True
When determining the geometry of a molecule, count all electron groups around the central atom True or False
True
