Tv20103 exercise 1

SCHOOL OF EDUCATION AND SOCIAL DEVELOPMENT
UNIVERSITI MALAYSIA SABAH
JALAN UMS,
88400 KOTA KINABALU, SABAH, MALAYSIA
Program : PROGRAM PENSISWAZAHAN GURU (PPG)
Semester : II
Academic Session : 2011/2012
Course Name : PENGENALAN KIMIA ORGANIK DAN TAK ORGANIK
Course Code : TV20103
EXERCISE 1
ANSWER ALL QUESTIONS.
Periodic Table of Elements
1. Which of the following properties cannot be predicted from the position of an element in the
Periodic Table?
A) The charge of its ion
B) The formula of its chloride
C) The number of isotopes it has
D) The acidic or basic nature of its oxide
2. The structure of a compound containing element Q and hydrogen is shown as follows:
To which group of the Periodic Table does element Q belong?
A) 14
B) 15
C) 16
D) 17
3. Which of the following elements belong to the same group in the Periodic Table?
7
3P 9
4Q 27
13R 35
17S 40
20T
A) P and R
B) R and T
C) P and S
D) Q and T
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4. Atom of Element X has proton number of 19. Which of he following statements are true
concerning X?
I X has one valence electron.
II The oxide of element X is soluble in water.
III X is in Period 4 of the Periodic Table.
IV X has the same chemical properties as fluorine.
A) I and III only
B) II and IV only
C) I, II and III only
D) I, III and IV only
5. An atom of element Y has a nucleon number of 31 with 16 neutrons. Which of the following
statements is true concerning element Y?
A) Atom of element Y has 16 protons.
B) Atom of element Y has two filled electron shells.
C) Atom of element Y has six valence electrons.
D) Element Y is in Group 15 of the Periodic Table.
6. An element X has a proton number of 9. In which group and period does X belong to in the
Periodic Table?
Group 18 Elements
7. The symbols for four elements are shown below.
4
2W 16
8X 24
12Y 40
18Z
Which of the following statements is true?
A) Both elements W and Z are monatomic.
B) Element Z is more reactive than element X.
C) Elements W and Y react to form a compound with the formula YW.
D) Elements X and Y react to form a compound with the formula YX2.
8. Which of the inert gases below is used in a diver’s oxygen tank?
A) Neon
B) Argon
C) Helium
D) Krypton
2

9. Which element, as represented by the symbols below, exists as monatoms?
A) W
B) X
C) Y
D) Z
10. The element which does not form compound with other elements is likely to have a proton number
of
A) 4
B) 6
C) 8
D) 10
11. As we go down Group 18,
I the density increases.
II the reactivity decreases.
III the boiling point increases.
IV the atomic size decreases.
A) I and III only
B) II and IV only
12. Argon does not form compound with chlorine because
A) it has three filled electron shells.
B) it has low melting and boiling points.
C) it has eight electrons in the outermost electron shell.
D) the atoms have the same number of protons and neutrons in the nucleus.
Group I Elements
13. Rubidium is below sodium in Group I. Which statements below about rubidium are correct?
I It is more reactive than sodium.
II It burns in air to form rubidium oxide which is insoluble in water.
III It is produced from the electrolysis of molten rubidium chloride.
IV It reacts with cold water to form rubidium hydroxide and hydrogen.
A) I and III only
B) II and IV only
C) I, III and IV only
D) I, II, III and IV
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14. Which of the following explains why sodium is more reactive than lithium?
A) Sodium has more protons than lithium.
B) Sodium has less valence electrons than lithium.
C) Sodium has a lower melting point than lithium.
D) Sodium can release its valence electron more easily.
15. An element X is burned in air. The product of combustion is then dissolved in water. The solution
gives a pH value of 14. The element X is
A) potassium.
B) phosphorus.
C) aluminium.
D) sulphur.
16. Which of the statements below are true concerning potassium?
I Potassium is more electropositive than sodium.
II Potassium hydroxide is soluble in water.
III Potassium reacts with water to form potassium oxide and hydrogen gas.
IV Potassium nitrate salt decomposes to potassium nitrite salt and oxygen gas when heated
strongly.
A) I, II and III only
B) I, II and IV only
C) II, III and IV only
17. Which statement concerning the ions of Group I elements is correct?
A) Each contains more protons than electrons.
B) Each contains more electrons than protons.
C) Each has one electron in its outer electron shell.
D) Each contains the same number of protons and electrons.
18. As we go down Group I,
I the density increases.
II the melting point increases.
III the reactivity increases.
IV the electropositivity decreases.
A) I and II only
B) I and III only
C) II and III only
D) II and IV only
19. The element X has a proton number of 19. Element X
A) forms a basic oxide that is insoluble in water.
B) reacts with cold water to form an acidic solution.
C) reacts with chlorine to form a compound with formula XCl2.
D) is more reactive than an element with a proton number of 11.
4

Group 17 Elements
20. Which of the following explains why chlorine is more reactive than bromine?
A) Chlorine is less dense than bromine.
B) Chlorine has a lower boiling point than bromine.
C) Chlorine atom accepts an electron more easily than bromine atom.
D) Chlorine atom contains less protons than bromine atom.
21. Which of the following statements below are true concerning bromine?
I Bromine can displace chlorine from potassium chloride solution.
II Bromine water can be used to differentiate hexene from hexane.
III Bromine reacts with iron wool to form iron(III) bromide salt.
IV Bromine reacts with sodium hydroxide solution to form sodium bromide, sodium
hypochlorate(I) and water.
A) I and III only
B) II and IV only
22. An element from Group X can dissolve in water to form an acidic solution. This resulting solution
reacts with silver nitrate reagent to form a white precipitate. In which group of the Periodic Table
does the element belong to?
A) 1
B) 2
C) 16
D) 17
23. Which of the statements below is not true concerning Group 17 elements?
A) Bromine is a gas at room temperature.
B) Chlorine is more reactive than bromine.
C) As we go down Group 17, the density increases.
D) Chlorine is more electronegative than bromine.
24. As we go down Group 17,
I the reactivity decreases.
II electronegativity increases.
III the melting point increases.
IV the solubility of the element in water decreases.
B) I, III and IV only
25. Which statements about ions of Group 17 elements are correct?
A) Each has eight valence electrons.
B) Each contains more protons than electrons.
C) Each contains more protons than neutrons.
D) Each has an odd number of electrons.
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26. Which of the following statements are true about chlorine and bromine?
I Both are gases at room temperature.
II They react with sodium to form soluble salts.
III They react with heated ion wool to form iron(II) halides.
IV They dissolve in water to form solutions with pH values of less than 7.
A) I and III only
B) II and IV only
C) I, II and IV only
D) II, III and IV only
27. An element X has a proton number of 35. Which statement about X is true?
A) X forms a positive ion during chemical reactions.
B) It belongs to Group 15 of the Periodic Table.
C) Reacts with iron wool to form a compound with the formula FeX3.
D) Reacts with sodium to form a compound with formula NaX2.
28. Which of the following statements about the Periodic Table is true?
A) All inert gases have eight valence electrons.
B) All Group I elements are equally reactive.
C) The atomic radius increases in size across a period from left to right.
D) The electronegativity of Group 17 elements increases up the group.
Elements in a Period
29. The table shows the proton numbers of four elements
Arrange the atomic radii of the elements in increasing order.
A) P, Q, R, S, T
B) P, S, R, Q, T
C) T, S, R, Q, P
D) T, Q, R, S, P
30. Which of the following metallic oxides can react with both acid and alkaline solutions?
I Aluminium oxide
II Tin(II) oxide
III Lead(II) oxide
IV Copper(II) oxide
A) I and III only
B) II and IV only
6

31. X, Y, and Z are elements in the same period of the Periodic Table. The oxide of X is acidic, the
oxide of Y is basic and the oxide of Z is amphoteric. Arrange the elements X, Y, and Z in
increasing proton numbers.
A) Z, X, Y
B) X, Z, Y
C) Y, X, Z
D) Y, Z, X
32. X, Y and Z are three elements with consecutive proton numbers. The element Y is in Group 18 of
the Periodic Table. Which of the statements below are true?
I Element X is more electronegative than element Z.
II Element X reacts with element Z to forma compound with formula ZX2.
III The oxide of X is acidic whereas the oxide of Z is basic.
IV Element X can conduct electricity whereas element Z does not.
A) I and III only
B) II and IV only
33. The graph shows the change in a property as we go across Period 3 of the Periodic Table.
Which of the properties below corresponds to the change as shown in the graph above?
A) Atomic radius
B) Electropositivity
C) Electrical conductivity
D) Density
34. The table shows the proton numbers of these elements X, Y, and Z.
Which of the following statement is true?
A) X, Y, and Z are all conductors of electricity.
B) Al the elements above are made up of atoms.
C) The atomic radius decreases in the order Z, Y, X.
D) The electronegativity increases in the order X, Y, Z.
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Transition Elements
35. Which of the following elements will form coloured compounds?
I Cobalt
II Nickel
III Aluminium
IV Manganese
36. The diagram shows part of a Periodic Table.
Which of the following statements below are true about the elements in the Periodic Table?
I Element W is inert.
II Element Y has more than one oxidation state.
III Element X reacts with cold water to form X oxide and hydrogen.
IV Element Z reacts with iron to form a compound with formula FeX3.
A) II and IV only
B) I, II and III only
C) I, II and IV only
37. The properties of the transition metals include
I they form white compounds.
II they act as catalysts in chemical reactions.
III they have more than one oxidation state.
IV they form complex ions.
38. The table shows the properties of four elements. Which element is most likely to be a transition
element?
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39. An element X forms two oxides with the formula XO and X2O. Which of the following statements
is true about the element X?
A) It is a transition metal.
B) It is a Group I element.
C) It is a Group 17 element.
D) The oxides of element X are amphoteric.
40. Which of the following shows correctly the colour of the ions of the transition elements?
Prepared by:
Dr. Lay Yoon Fah
School of Education and Social Development
Universiti Malaysia Sabah
layyoonfah@yahoo.com.my
Date: 22 March 2012
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