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Essential Chemistry for IGCSE - Structure And Bonding (Section 2)

1
Which of the following statements are true about diamond?
Answer
A
C
D
2
What is the primary factor determining whether a substance is likely to be soluble in water?
Answer
(C)
Whether the substance has polar bonds.
3
Which of the following is/are a property of ionic compounds?
Answer
A
B
D
4
What type of bond is formed between the carbon atoms in diamond?
Answer
(B)
Covalent
5
Which of the following is a characteristic of ionic compounds?
Answer
(D)
They are formed by the transfer of electrons.
6
Which of the following correctly lists the components of graphite's structure?
Answer
A
B
7
Which of the following statements is/are true about graphite?
Answer
A
C
8
When an atom *loses* electrons, it becomes a(n) ______ ion.
Answer
(A)
Positive
9
What is the name given to the force of attraction between oppositely charged ions?
Answer
(C)
Ionic bond
10
Which of the following substances contains a giant covalent structure?
Answer
(B)
Diamond
11
What type of bonds are broken when melting a simple molecular substance?
Answer
(D)
Intermolecular forces
12
Which of the following are properties of graphite?
Answer
A
B
C
13
Which of the following molecules contains a double covalent bond?
Answer
(C)
O2
14
What is the approximate bond angle in a methane (CH4) molecule?
Answer
(B)
109.5 degrees
15
What is the shape of a methane molecule (CH4)?
Answer
(C)
Tetrahedral
16
Which statements correctly describe the properties of graphite?
Answer
A
C
D
17
Which of the following would be expected to have the highest melting point?
Answer
(B)
Sodium Chloride (NaCl)
18
Which of the following describes the bonds present in the oxygen molecule (O2)?
Answer
(B)
Double covalent bond
19
Which of the following statements are correct regarding covalent bonds?
Answer
A
B
20
What type of bonding is present in diamond?
Answer
(C)
Covalent
21
What is the electronic configuration of an element that has 18 electrons?
Answer
(C)
2, 8, 8
22
Which of the following statements is/are TRUE about the properties of ionic compounds?
Answer
B
C
23
Which of the following is true about the structure of silicon dioxide (SiO2)?
Answer
(C)
It has a giant covalent structure.
24
Which of the following substances has a giant covalent structure?
Answer
(B)
Graphite
25
Which of the following characteristics best describes the type of force that holds molecules of a simple covalent compound together?
Answer
(C)
Intermolecular forces
26
Which of the following compounds contains covalent bonds?
Answer
(C)
Water
27
Which of the following is a property of covalent compounds?
Answer
(C)
Low melting point
28
What is the name given to the repeating three-dimensional arrangement of ions in an ionic compound?
Answer
(C)
A crystal lattice
29
Which of the following is the correct description of the bonding in sodium chloride (NaCl)?
Answer
(C)
Ionic bonding
30
What does the term 'delocalized electrons' refer to in graphite?
Answer
(B)
Electrons that are free to move throughout the structure.
31
Which of the following properties are characteristic of simple molecular covalent substances?
Answer
B
D
32
Which of the following statements are true about covalent bonds?
Answer
A
B
33
Which of the following best describes the type of bonding in a water molecule (H2O)?
Answer
(C)
Covalent bonding
34
What kind of bonds are present in a water molecule (H2O)?
Answer
(C)
Covalent bonds
35
Which of the following is/are properties of giant covalent structures?
Answer
A
D
36
What is the main difference between ionic and covalent bonds?
Answer
(C)
Ionic bonds involve transferring electrons, while covalent bonds involve sharing electrons.
37
What type of force holds the atoms together in graphite?
Answer
(C)
Both of the above.
38
Which of the following statements describe properties of substances held together by intermolecular forces?
Answer
A
B
39
What are the types of atoms in silicon dioxide?
Answer
(A)
Silicon and Oxygen
40
What type of bonding and structure is present in a sample of diamond?
Answer
(D)
Covalent bonding, giant covalent structure.
41
What type of forces act between the layers of graphite?
Answer
(D)
Weak intermolecular forces
42
What does the term 'valency' refer to?
Answer
(C)
The number of electrons an atom needs to gain or lose to achieve a stable configuration.
43
What type of bond is formed between two nonmetal atoms?
Answer
(B)
Covalent
44
What is the shape of a carbon dioxide (CO2) molecule?
Answer
(C)
Linear
45
What is the difference between a single, double and triple covalent bond?
Answer
(A)
Single bonds share one pair of electrons, double bonds share two, triple bonds share three.
46
Which statement best describes the type of bonding and structure in a sample of copper metal?
Answer
(C)
Metallic bonding, giant metallic structure.
47
In an ionic compound, what is the overall charge of the compound?
Answer
(C)
Zero
48
What is the charge on a magnesium ion?
Answer
(C)
+2
49
What is the electronic structure of a fluorine atom?
Answer
(B)
2, 7
50
Which of the following is a characteristic of graphite?
Answer
(C)
It is soft and slippery.