[TYS] Chemistry Paper 1

Chemistry Pro TYS

Chapter 2.3

Chemical Bonding

Paper 1

Paper 2A

Paper 2B

Time limit: 0

MCQ Summary

0 of 27 Questions completed

Questions:

Information

You have already completed the mcq before. Hence you can not start it again.

MCQ is loading…

You must sign in or sign up to start the mcq.

You must first complete the following:

Results

MCQ complete. Results are being recorded.

Results

0 of 27 Questions answered correctly

Your time:

Time has elapsed

You have reached 0 of 0 point(s), (0)

Earned Point(s): 0 of 0, (0)
0 Essay(s) Pending (Possible Point(s): 0)

Average score
Your score

Categories

Not categorized 0%

Would you like to submit your mcq result to the leaderboard?

Loading

Name: E-Mail:

Captcha:

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27

Current
Review
Answered
Correct
Incorrect

Question 1 of 27

1. Question
1 point(s)
A metal X and a non-metal Y react together to form an ionic compound X₂Y.

Which statement is correct when this compound is being formed?
- Each atom of X gives away one electron only.
- Each atom of X receives one electron only.
- Each atom of Y gives away one electron only.
- Each atom of Y receives one electron only.
Correct

Incorrect
Hint
- Deduce the charges on the ions present from the formula of the ionic compound
- Formation of ions by electron loss/gain in order to obtain electronic structure of a noble gas
Question 2 of 27

2. Question
1 point(s)
Which structure does not contain atoms bonded to other atoms by four covalent bonds?
- diamond
- graphite
- poly(ethene)
- sand (silicon dioxide)
Correct

Incorrect

Hint

Compare the giant molecular structures of diamond, graphite, poly(ethene) and sand (silicon dioxide)
Question 3 of 27

3. Question
1 point(s)
In which molecule are all the outer electrons of the atoms involved in bonding?
- HF
- H₂O
- NH₃
- CH₄
Correct

Incorrect

Hint

Covalent compounds are formed between non metal atoms by sharing electrons to achieve the noble gas configuration
Question 4 of 27

4. Question
1 point(s)
The formation of metallic oxides involves the transfer of electrons from metal atoms to oxygen.

In the formation of one mole of which metallic oxide do the metal atoms not transfer exactly two moles of electrons?
- aluminium oxide
- iron(II) oxide
- magnesium oxide
- sodium oxide
Correct

Incorrect

Hint

Recall formation of ionic bonds where metal atoms transfer valence electrons to non-metal atoms
Question 5 of 27

5. Question
1 point(s)
Solid copper metal, aqueous copper(II) sulfate, solid graphite and molten sodium chloride will all conduct electricity.

Which pair will conduct electricity because they both contain mobile ions?
- aqueous copper(II) sulfate and molten sodium chloride
- solid copper metal and aqueous copper(II) sulfate
- solid copper metal and solid graphite
- solid graphite and molten sodium chloride
Correct

Incorrect

Hint

Recall electrical conductivity by different types of structures.
Question 6 of 27

6. Question
1 point(s)
The diagram shows the structure of a compound of carbon and silicon, (SiCl)ₙ.

Which statement would be true for (SiCl)ₙ?
- It acts as a lubricant.
- It conducts electricity.
- It is insoluble in water.
- It has a low melting point.
Correct

Incorrect
Hint
- Recall diagrams of giant covalent structure formed by carbon or silicon
- Relate physical properties to the structures
Question 7 of 27

7. Question
1 point(s)
A compound contains two elements, metal Y and non-metal Z.

The compound consists of a lattice of positive ions and negative ions. Each positive ion is surrounded by eight negative ions and each negative ion is surrounded by four positive ions.

Which ions are present in the compound, and what is its formula?
- A
- B
- C
- D
Correct

Incorrect
Hint
- Deduce the formula of a compound from the ratio of the ions in the lattice
- Deduce the charge of the ions from the empirical formula
- Metal atoms lose electrons and form positive ions while non-metal atoms gain electrons to form negative ions
Question 8 of 27

8. Question
1 point(s)
Which statement about the substance formed when a given mass of an element burns in excess oxygen is always correct?

The substance formed is
- denser than the element.
- greater in mass than the element.
- soluble in water.
- white in colour.
Correct

Incorrect

Hint

The differences between elements, compounds and mixtures
Question 9 of 27

9. Question
1 point(s)
Which row shows the substances in the order of their melting points?
- A
- B
- C
- D
Correct

Incorrect

Hint

Recall chemical bonding and their structural properties
Question 10 of 27

10. Question
1 point(s)
The table shows some properties of four substances.

Which substance has a structure held together by electrostatic forces of attraction between oppositely charged ions?
- A
- B
- C
- D
Correct

Incorrect

Hint

Recall structure and bonding of ionic compounds as related to their physical properties
Question 11 of 27

11. Question
1 point(s)
In which compound does one of the atoms not achieve the electronic configuration 2,8?
- CCl₄
- CO₂
- MgO
- Na₂O
Correct

Incorrect
Hint
- Ionic compounds involve formation of ions by electron loss/gain in order to obtain the electronic configuration of a noble gas
- Covalent compounds are formed between non-metal atoms by sharing electrons to achieve the noble gas configuration
Question 12 of 27

12. Question
1 point(s)
Which particles are responsible for the conduction of electricity through metals?
- electrons only
- electrons and positive ions
- negative ions only
- negative ions and positive ions
Correct

Incorrect

Hint

Metals are described as lattice of positive ions in a ‘sea of electrons’
Question 13 of 27

13. Question
1 point(s)
Covalent bonds are formed when atoms share electrons.

How many electrons are provided by each of the atoms of the elements oxygen, fluorine and carbon when they form covalent compounds?
- A
- B
- C
- D
Correct

Incorrect

Hint

Covalent compounds are formed between non metal atoms by sharing electrons to achieve the noble gas configuration
Question 14 of 27

14. Question
1 point(s)
Oxygen crystals are obtained by freezing oxygen at -223°C.

What will the oxygen crystals contain?
- oxygen atoms and molecules
- oxygen ions and oxygen atoms
- oxygen molecules only
- oxygen atoms only
Correct

Incorrect

Hint

Change of state does not alter the chemical nature of substances
Question 15 of 27

15. Question
1 point(s)
Carbon disulfide, CS₂, is a covalent liquid.

Which is the dot-and-cross diagram for carbon disulfide?
Correct

Incorrect

Hint

Covalent compounds are formed between non-metal atoms by sharing electrons to achieve the noble gas configuration
Question 16 of 27

16. Question
1 point(s)
Which statements correctly describe the properties of mixtures of iron and sulfur, and the compound iron(II) sulfide, FeS?
- 1 only
- 1 and 2
- 2 and 3
- 3 only
Correct

Incorrect

Hint

Describe the differences between mixtures and compounds
Question 17 of 27

17. Question
1 point(s)
Which substance could be graphite?
- A
- B
- C
- D
Correct

Incorrect

Hint

Recall how properties of graphite are related to its bonding and structure
Question 18 of 27

18. Question
1 point(s)
Which salt contains covalent bonds?
- ammonium chloride
- magnesium bromide
- potassium iodide
- sodium fluoride
Correct

Incorrect

Hint

Recall formation of ionic bonds between metals and non-metals
Question 19 of 27

19. Question
1 point(s)
Phosphorus trichloride, PCl₃, is a molecule formed when the elements phosphorus (Group V) and chlorine (Group VII) react together.

How many electrons in the outer shell of the phosphorus atom are not involved in bonding?
- 0
- 1
- 2
- 3
Correct

Incorrect

Hint

Recall formation of a covalent bond by sharing of a pair of electrons in order to gain the electronic configuration of a noble gas
Question 20 of 27

20. Question
1 point(s)
Which statements are correct for both metals and ionic compounds?
1. They conduct electricity because electrons flow through the solid material.
2. Most have high melting points.
3. They contain positive ions.
- 1, 2 and 3
- 1 and 2 only
- 1 and 3 only
- 2 and 3 only
Correct

Incorrect

Hint

Relate electrical conductivities and melting points of substances to their structure and bonding
Question 21 of 27

21. Question
1 point(s)
Which pair of elements combine together to form a covalent molecule?
- aluminium and oxygen
- carbon and sulfur
- lithium and nitrogen
- magnesium and sulfur
Correct

Incorrect

Hint

Non-metal atoms share electrons to form covalent molecule
Question 22 of 27

22. Question
1 point(s)
A substance has a high melting point. When solid, it does not conduct electricity but when molten, it does conduct.

Which type of structure does the substance have?
- giant lattice
- metallic
- polymeric
- simple molecular
Correct

Incorrect

Hint

Physical properties of substances based on their structure and bonding
Question 23 of 27

23. Question
1 point(s)
How many covalent bonds are there in the molecule with the formula CH₂CHCH₃?
- 7
- 8
- 9
- 10
Correct

Incorrect

Hint

Covalent compounds are formed between non metal atoms by sharing electrons to achieve the noble gas configuration
Question 24 of 27

24. Question
1 point(s)
Copper is a metal. The structure of copper is described as a lattice of positive ions in a ‘sea of electrons’.

Which statements about copper are correct?
1. Copper conducts heat because the positive ions are free to move.
2. Copper conducts electricity because the electrons are free to move.
3. Copper ions are held together because of their attraction for each other.
4. Copper has a high melting point due to the strong covalent bonds.
- 1, 2 and 3
- 2, 3 and 4
- 2 and 3 only
- 2 only
Correct

Incorrect

Hint

Recall how properties of metals are related to its bonding and structure
Question 25 of 27

25. Question
1 point(s)
Which property is common to both diamond and graphite?
- Each atom in the structure forms four covalent bonds.
- They act as a lubricant when finely divided.
- They are electrical insulators.
- They react with oxygen to produce carbon dioxide.
Correct

Incorrect

Hint

Recall how properties of diamond and graphite are related to its bonding and structure
Question 26 of 27

26. Question
1 point(s)
Both calcium chloride and potassium chloride are ionic compounds.

Which statements about these compounds are correct?
1. Potassium chloride has a higher melting point than calcium chloride because the potassium ion has a greater charge than the calcium ion.
2. In the calcium chloride lattice, the ratio of calcium ions to chloride ions is half that of the ratio of potassium ions to chloride ions in the potassium chloride lattice.
3. Molten calcium chloride has a greater electrical conductivity than molten potassium chloride because calcium contributes more electrons to the delocalised ‘sea of electrons’ than does potassium.
- 1 and 2
- 1 and 3
- 2 only
- 3 only
Correct

Incorrect

Hint

Recall structure and bonding of ionic compounds as related to their physical properties
Question 27 of 27

27. Question
1 point(s)
For which does 1 mole of the metal have the most electrons in its ‘sea of electrons’?
- aluminium
- barium
- caesium
- strontium
Correct

Incorrect

Hint

Metallic bonding and electrical conductivity