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UlangKaji Chemistry F4

Total questions: 60

Worksheet time: 2hrs 31mins

Name
Class
Date
1.

_______ is an isotope used to detect leakage in underground gas or oil pipelines.

a)

Sodium-24

b)

Cobalt-60

c)

Carbon-14

d)

Iodine-131

2.

Which of the following is FALSE about isotopes?

a)

Same nucleon number

b)

Same proton number

c)

Different number of neutrons

d)

Different number of electrons

3.

The method in the diagram can be used to determine empirical formula for..

a)

magnesium & lead

b)

copper & calcium

c)

copper & aluminium

d)

lead & zinc

4.

Which of the following is caused by hydrogen bonds?

a)

Iceberg floating on the surface of the sea

b)

Metals can conduct electricity while non-metals cannot

c)

Sticky damp hair strand

d)

Salt can dissolve in water but not organic solvent

5.

Which of the following salts CANNOT be produced using acid-base titration method?

a)

Sodium chloride

b)

Copper (II) nitrate

c)

Ammonium sulphate

d)

Potassium carbonate

6.
What Periodic Table family is represented by the Lewis dot diagram?
a)
Halogens
b)
Alkali Metals
c)
Transition Metals
d)
Noble Gases
7.
Which of the following is the atomic number of an alkali metal?
a)
31
b)
20
c)
18
d)
19
8.
Which properties are characteristic of the Group 1 metals?
a)
high reactivity and the formation of unstable compounds
b)
low reactivity and the formation of unstable compounds
c)
high reactivity and the formation of stable compounds
d)
low reactivity and the formation of stable compounds
9.

The elements in this family are soft, silvery, and very reactive with water.

a)

Alkaline Earth Metals

b)

Alkali Metals

c)

Transition Metals

d)

Lanthanides

10.

What group is the family found? These halides are very reactive and almost have full outer energy level/shell.

a)

1

b)

2

c)

16

d)

17

11.
Argon (Ar)
a)
alkali metal
b)
alkaline earth metal
c)
halogen
d)
noble gas
12.
What is the chemical symbol for Lithium?
a)
H
b)
He
c)
Li
d)
N
13.
A proton is....
a)
A negatively charged subatomic particle
b)
A positively charged subatomic particle
c)
A neutrally charged subatomic particle
d)
The only subatomic particle located in the nucleus
14.

Which property is common to both diamond and graphite?

a)

Each atom in the structure forms four covalent bonds.

b)

They act as a lubricant.

c)

They are electrical conductors.

d)

Both have giant molecular structure.

15.

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?

a)

Giant Ionic Lattice

b)

Simple Molecular

c)

Giant Molecular

d)

Metallic

16.

What is the charge for fluorine?

a)

+7

b)

-1

17.

What is the charge of Beryllium?

a)

+2

b)

-5

18.

What is the charge of Nitrogen?

a)

+3

b)

-3

c)

+4

d)

-5

19.

Which of the following would be considered a diatomic molecule?

a)

H2

b)

H2O

c)

O2

d)

F2

20.

An ion cannot be:

a)

positive

b)

negative

c)

neutral

21.

Potassium iodide (KI) would be an example of a:

a)

noble gas

b)

sugar

c)

salt

22.

Sodium Chloride (NaCl) is an example for a

a)

transition metal

b)

halogen

c)

sugar

d)

salt

23.

Ag and AG (Silver and Silver) is what kind of bond?

a)

ionic

b)

covalent

c)

metallic

24.

What is the name of this object?

a)

blue paper

b)

litmus paper

c)

red paper

25.

Which of the following are the physical characteristics of salt crystal?

Berikut yang manakah ciri-ciri fizikal hablur garam?


I They have similar size/Mempunyai saiz sama

II They have fixed angles/Mempunyai sudut yang tetap

III They have specific geometrical shapes/Mempunyai bentuk geometri tertentu

IV They have flat surface, straight edges and sharp angles/Mempunyai permukaan yang rata, sisi yang lurus dan bucu yang tajam

a)

I, II and III

b)

I, II and IV

c)

I, III and IV

d)

II, III and IV

26.

Garam manakah digunakan sebagai perisa di dalam masakan?

Which salt is used as flavouring in cooking?

a)

Natrium klorida, NaCl

Sodium chloride

b)

Natrium nitrat, NaNO3

Sodium nitrate

c)

Ammonium nitrat, NH4NO3

Ammonium nitrate

d)

Ammonium klorida, NH4Cl

Ammonium chloride

27.

? +? → garam+air

? +? → salt+water

a)

asid, alkali

acid, alkali

b)

alkali, alkali

c)

asid,asid

acid, acid

d)

asid, neutral

acid, neutral

28.

Pernyataan manakah yang betul tentang garam?

Which statement is correct about salt?

a)

Garam ialah sebatian ion yang terhasil apabila ion H+ daripada suatu alkali digantikan dengan ion logam

Salt is an ionic compund formed when the hydrogen ion, H+ from alkali is replaced by a metal ion

b)

Garam ialah sebatian ion yang terbentuk apabila ion hydrogen,H+ daripada asid digantikan dengan ion logam

Salt is an ionic compound formed when the hydrogen ion, H+ from acid is replaced by a metal ion

c)

Garam ialah sebatian kovalen yang terhasil apabila ion H+ daripada suatu asid digantikan dengan ion logam

Salt is a covalent compound formed when the hydrogen ion, H+ from acid is replaced by a metal ion

d)

Garam ialah sebatian kovalen yang terhasil apabila ion OH- daripada suatu bes digantikan dengan ion logam

Salt is a covalent compound formed when the hydroxide ion, OH- from alkali is replaced by a metal ion

29.
2H2  +   O2  →  2H2O
How many moles of oxygen are consumed if 8 moles H2 are used?
a)
2
b)
4
c)
6
d)
8
30.
For the Balanced Reaction: 3 Mg + 1 Fe2O3 → 3 MgO + 2 Fe; What is the Ratio of moles of MgO to moles Fe?
a)
3mol Mg / 2 mol Fe
b)
2 mol Mg/ 3 mol Fe
c)
1 mol Fe/ 2 mol Fe
d)
3 mol MgO / 2 mol Fe
31.

What is the limiting reactant if 10 moles of NH3 react with 30.0 moles of NO?

4NH3+ 6NO --> 5N2 + 6H2O

a)

NH3

b)

NO

c)

N2

d)

water

32.
If an atom has 12 positively charged subatomic particles, which of the following must it also have to be considered a neutral atom?
a)
12 neutrons
b)
12 electrons
c)
12 protons
d)
24 protons and neutrons
33.
An atom has 10 protons, 15 neutrons and 10 electrons what is its mass number.
a)
20
b)
10
c)
5
d)
25
34.
Which subatomic particle has a positive (+) charge?
a)
Neutron
b)
Proton
c)
Electron
35.
Bonus question: What element is this an atom of?
a)
nitrogen
b)
lithium
c)
beryllium
d)
carbon
36.
What is the mass number?
a)
the number of protons
b)
the number of protons and neutrons
c)
the number of neutrons
d)
the number of protons and electrons
37.
Covalent bonds are between...
a)
Metal and Non-metal
b)
Non-metal and Non-metal
c)
Metal and Metal
38.
Ionic bonds are between...
a)
Metal and Non-metal
b)
Non-metal and Non-metal
c)
Metal and Metal
39.
How are covalent bonds formed?
a)
Sharing of electrons
b)
Transfer of electrons
40.
How are ionic bonds formed?
a)
Transfer of electrons
b)
Sharing of electrons
41.
Where are the metalloids located on the periodic table?
a)
Blue
b)
Red
c)
Green
42.
Where are metals located on the periodic table?
a)
Blue
b)
Green
c)
Red
43.
What happens when an atom loses an electron?
a)
It becomes Negatively Charged
b)
It remains neutral because the proton also leaves.
c)
It becomes Positively Charged
d)
It stays the same.
44.
If an atom loses two electrons what charge will it have?
a)
-2
b)
-1
c)
+1
d)
+2
45.

Which color on the image of the periodic table corresponds with the noble gases.

a)

red

b)

black

c)

blue

d)

orange

46.

Which color on the image of the periodic table corresponds with the halogens.

a)

red

b)

black

c)

blue

d)

orange

47.

How many gram is 0.5 mol of Copper atoms? [Cu: 63.5gmol-1]

a)

63.5 g

b)

6.35

c)

31.75

d)

3.175

48.

How many molecules are in 2.00 moles of H2O?

a)

124 x 1024 molecules of H2O

b)

1.20 x 1023 molecules of H2O

c)

12.04 x 1023 molecules H2O

d)

124

49.

How many atoms are there in a (NH4)2 HPO4 molecule?

a)

11

b)

5

c)

16

d)

8

50.

What is the mol number of 250 g CaCO3 ?

[Ca: 40 gmol-1, C: 12 gmol-1, O: 16 gmol-1]

a)

1.5 mol

b)

1.0 mol

c)

2.5 mol

d)

2.0 mol

51.

How many atoms are there in 2.2 mole of NaOH atom?

a)

6.6 mol of atoms

b)

2.2 mol of atoms

c)

3 mol of atoms

d)

4 mol of atoms

52.

What is the mole number of Mg(OH)2 that contains 16 moles of hydrogen atom?

a)

8 mol

b)

2 mol

c)

16 mol

d)

32 mol

53.

How many atoms of copper in 65.0 g of copper(II) chloride?

a)

2.91 ×1023 atoms2.91\ \times10^{23}\ atoms  

b)

3.95 ×1023 atoms3.95\ \times10^{23}\ atoms  

c)

  5.81×1023 atoms5.81\times10^{23}\ atoms  

d)

  7.90×1023 atoms7.90\times10^{23}\ atoms  

54.

How many atoms of chlorine in 65.0 g of copper(II) chloride?

a)

2.91 ×1023 atoms2.91\ \times10^{23}\ atoms

b)

3.95 ×1023 atoms3.95\ \times10^{23}\ atoms

c)

5.81×1023 atoms5.81\times10^{23}\ atoms

d)

7.90×1023 atoms7.90\times10^{23}\ atoms

55.

If the molecular formula for compound Z is C8H18. What is the empirical formula?

a)

C8H18

b)

C4H8

c)

CH9

d)

C4H9

56.

Caffeine has formula unit C8H10N4O2. Calculate the molar mass of caffeine.

a)

102

b)

24

c)

194

d)

124

57.

Chalk is mostly made of calcium carbonate, CaCO3. If it took 48.6 g of chalk to write your name on the sidewalk, how many moles of calcium carbonate does your name contain?

a)

0.49 mol

b)

0.97 mol

c)

1.03 mol

d)

2.06 mol

58.

How many atoms are contained in 25 g of NaBr?

a)

6.54 x 1023 atoms

b)

3.27 x 1023 atoms

c)

2.93 x 1023 atoms

d)

1.46 x 1023 atoms

59.

How many grams are in 1.2 x 1024 molecules of CO?

a)

9.30 g

b)

55.81 g

c)

14.05 g

d)

0.50 g

60.

A container with a volume of 893 L contains how many moles of air at STP?

a)

2.5 x 10-2 mol

b)

39.9 mol

c)

22.4

d)

2.7 x 10-2 mol

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