Topic 4 Review Questions
[25
marks]
1. Which compound has the shortest C to O bond?
[1 mark]
A. CH3CHO
B. CO
C. CO2
D. C2H5OC2H5
2. Which describes a resonance structure?
[1 mark]
A. Double bond can be drawn in alternative positions.
B. Bonds vibrate by absorbing IR radiation.
C. A double and a single bond in the molecule
D. A Lewis structure
3. What is the structure and bonding in SiO2 (s)?
[1 mark]
4. Which is correct for all solid ionic compounds?
[1 mark]
A. High volatility
B. Poor electrical conductivity
C. Low melting point
D. Good solubility in water
5. Which combination corresponds to a strong metallic bond?
[1 mark]
6. What is the order of increasing boiling point?
[1 mark]
A.
CH3CH2CH2CH3
< CH3CH(OH)CH3 < CH3COCH3 < CH3CO2H
B.
CH3CH2CH2CH3
< CH3COCH3 < CH3CH(OH)CH3 < CH3CO2H
C. CH3CO2H < CH3COCH3 < CH3CH(OH)CH3 < CH3CH2CH2CH3
D. CH3CH2CH2CH3 < CH3COCH3 < CH3CO2H < CH3CH(OH)CH3
7. Which combination causes the strength of metallic bonding to increase?
[1 mark]
8. Which molecule contains an incomplete octet of electrons?
[1 mark]
A. NF3
B. BF3
C. BrF
D. SF2
9. Which compound has hydrogen bonds between its molecules?
A. CH4
B. CH4O
C. CH3Cl
D. CH2O
[1 mark]
10. How many lone pairs and bonding pairs of electrons surround the central [1 mark]
chlorine atom in ClF2+?
11. Which molecule is polar?
[1 mark]
A. BeCl2
B. BCl3
C. NCl3
D. CCl4
12. Which species has the same molecular geometry as SO32−?
[1 mark]
A. BF3
B. SO3
C. PF3
D. CO32−
13. Which form of carbon is the poorest electrical conductor?
A.
Graphite
B.
Graphene
C.
Diamond
D.
Carbon nanotube
[1 mark]
14. What is the molecular geometry and bond angle in the molecular ion
NO 3−?
[1 mark]
15. What is the formula of ammonium phosphate?
[1 mark]
A.
(NH3)3PO4
B.
(NH4)3PO4
C.
(NH4)2PO4
D.
(NH3)2PO3
16. What are the predicted electron domain geometries around the carbon
and both nitrogen atoms in urea, (NH2)2CO, applying VSEPR theory?
[1 mark]
17. The compounds shown below have similar relative molecular masses.
What is the correct order of increasing boiling point?
[1 mark]
A.
CH3COOH < (CH3)2CO < (CH3)2CHOH
B.
CH3COOH < (CH3)2CHOH < (CH3)2CO
C.
(CH3)2CO < CH3COOH < (CH3)2CHOH
D.
(CH3)2CO < (CH3)2CHOH < CH3COOH
18. What is the formula of magnesium nitride?
A.
MgN
B.
Mg2N3
C.
Mg3N
D.
Mg3N2
[1 mark]
19. Which of the following series shows increasing hydrogen bonding with
water?
[1 mark]
A. Propane < propanal < propanol < propanoic acid
B. Propane < propanol < propanal < propanoic acid
C. Propanal < propane < propanoic acid < propanol
D. Propanoic acid < propanol < propanal < propane
20. The electronegativity values of four elements are given.
[1 mark]
What is the order of increasing polarity of the bonds in the following
compounds?
A. CO < OF2 < NO < CF4
B. CF4 < CO < OF2 < NO
C. NO < OF2 < CO < CF4
D. CF4 < NO < OF2 < CO
21. Which two atoms form the most polar bond?
A.
C and F
B.
C and Cl
C.
Si and F
D.
Si and Cl
22. Which correctly states the strongest intermolecular forces in the
compounds below?
[1 mark]
[1 mark]
23. How many bonding electrons are there in the urea molecule?
A.
8
B.
16
C.
20
D.
24
24. Which compound contains both ionic and covalent bonds?
[1 mark]
[1 mark]
A. SIH4
B. NaNO3
C. H2CO
D. Na2S
25. Which substance has a giant covalent structure?
[1 mark]
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