Topic 2- Bonding And Structure Exam Qs Flashcards
(13 cards)
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
