Topic 2- Bonding And Structure Exam Qs Flashcards
Diamond, graphene and graphite are different forms of carbon.
One way in which diamond differs from graphene and graphite is that only diamond has
A a high melting temperature
B a precise molecular formula
C poor electrical conductivity
D a giant structure
(1)
C- poor electrical conductivity
What type of reaction occurs when ammonia gas reacts with hydrogen chloride gas?
Acid-base
Diamond, graphene and graphite are different forms of carbon.
The structural feature that graphene and graphite have in common is that the carbon atoms are arranged in
A layers with each atom bonded to four others
B hexagonal and pentagonal rings within a layer
C hexagonal rings within a layer
D a three-dimensional structure
C- hexagonal rings within a layer
Q4.
This question is about covalent bonds. The dot-and-cross diagram of BF3 is
What is the bond angle in BF3?
A 90°
B 107°
C 109.5°
D 120°
D
Which molecule has a linear shape?
A H2S
B SO2
C CO2
D CH2==CH2
(Total for question = 1 mark)
(1)
C
Boric acid, H3BO3, is a weak acid with antiseptic properties.
Boric acid is a solid with melting temperature 171 °C.
What are the strongest interactions between the molecules in solid boric acid?
A covalent bonds
B hydrogen bonds
C ionic bonds
D London forces
B
This question is about ionisation energies.
(i) Which equation represents the second ionisation of bromine?
A Br(g) + e– → Br–(g)
B Br–(g) + e– → Br2–(g)
C Br(g) – 2e– → Br2+(g)
D Br+(g) – e– → Br2+(g)
D
(ii) Which set of successive ionisation energies is most likely to be associated with the element boron?
A 738, 1 451, 7 733, 10 541, 13 629
B 801, 2 427, 3 660, 25 026, 32 828
C 1 086, 2 353, 4 621, 6 223, 37 832
D 1 402, 2 856, 4 578, 7 475, 9 445
B
This is a question about atoms, isotopes and ions. Which of the following pairs of ions is isoelectronic?
A N3– and Cl–
B O2– and S2–
C Na+ and K+
D Na+ and Mg2+
D
This question is about atoms, molecules and ions.
Which of these isoelectronic ions has the largest ionic radius?
A N3–
B O2–
C Na+
D Al3+
(1)
A
Ionic bonding is the strong electrostatic attraction between
A anions and cations
B atoms and delocalised electrons
C cations and delocalised electrons
D two nuclei and a shared pair of electrons
A
Magnesium oxide has a very high melting temperature.
Which of the following is the best description of its structure and bonding?
A giant ionic
B giant metallic
C giant covalent
D simple covalent
A
Q14.
Diamond, graphene and graphite are different forms of carbon.
The bond angles within a layer of graphene and a layer of graphite are
A 90° and 109.5°
B all 109.5°
C 109.5° and 120°
D all 120°
(1)
D
