soalan kimia





















1  Which of the following processes occur when ammonium chloride is heated?                                              

 

  A  Melting
  B  Sublimation
  C Condensation
  D Boiling

 


 










2 Which of the following statements is true for one mole of a substance?

 

  A

 


B


 


C


 


D

1 mol of hydrogen gas contains 6.02 × 1023 atoms

 


1mol of magnesium contains 6.02 × 1023 molecules


 


1 mol  sodium chloride solution occupies 22.4 dm3 at s.t.p


 


1 mol of water contains the same number of molecules as the number of atoms in 12 g carbon-12.


 


 





































































3

 


 


 


 


 


 


 


 


 


 


 


 

Table 1 shows the melting point and boiling point of four substances W, X, Y and Z.

 




























Substance


 


Melting point / o C


 


Boiling point / o C


 


W


-187


-126


X


75


130


Y


114


444


Z


-79


68


 


Table 1


 


 


 


 


 
Which of the substances is liquid at room temperature ?

  A W
  B X
  C Y
  D Z
4 Diagram 1 shows the symbol for potassium atom.

 


 


                                                    39


                                                       K


                                                    19


                                                       


                                         


                                                 Diagram 1


 


Which of the following is true based on the symbol in Diagram 1.


 

    Proton number

 

Nucleon number Number of electron

 

 
  A 19 39 19  
  B 19 20 19  
  C 20 39 20  
  D 39 19 39  
               

 


 






















5 Which of the following is the empirical formula for propene, C3H6?

 

  A C3H6
  B CH3
  C CH2
  D CH

 


 






















6 Gypsum, CaSO4.2H2O is widely used in plastering of ceilings. What is the relative formula mass of gypsum ?

Given that the relative atomic mass of Ca=40, S=32, O=16, H=1 .

  A 164
  B 172
  C 180
  D 272

 


 


 






















7 The formula for a carbonate ion is CO32- and for a chloride is Cl-.

If the formula of the carbonate salt of X is XCO3,  what is the formula of the chloride salt of X ?


 

  A XCl
  B X2Cl
  C XCl2
  D X(Cl2)3

 


 






































8 A sodium atom and a sodium ion

 

  I are isotopes
  II have the same number of protons
  III have the same number of electrons
  IV have the same number of neutrons.

 

  A  II only

 

  B II and IV only 

  

  C I, II and III only

  

  D  I, III and IV only

 


 










9 Which of the following chemist arranged the elements in the Periodic Table of Elements in order of increasing proton number

 

  A

B


C


D


 

Moseley

Mendeleev


Dobereiner


Lothar Meyer


 


 































100 Which of the following statements best explain the stability of noble gases?   

                                                                                                         

  A

 


B


 


C


 


D

Have octet electron arrangement except helium

 


Can accept, lose or share electron


 


Have 8 valence electrons


 


Exists as polyatomic gases


 


 


 


 

11



Sodium chloride compound with the chemical formula of NaCl is formed when chlorine gas reacts with sodium metal.

 


 


 


 


Which of the following statements is true?


 


 

  A

 


B


 


C


 


D

Sodium chloride is a covalent compound.

 


The charge of chloride ion is -1.


 


The electron arrangement of sodium ion is 2.8.1


 


The sodium atom and chlorine atom share their valence electrons to achieve stable  electron arrangement.


 

     
12 Diagram 2  shows the electron arrangement of  two atoms X and Z respectively.

.


                       


                                                            Diagram 2


                                                           


Which of the following diagrams show the electron arrangement of the compound formed when element X reacts with element Z?


 

   

A


 


 


 


 


 


 


 


 


 


 


 


 


B


 


 


 


 


 


 


 


C


 


 


 


 


 


 


D

 

                                                                                                               


  


               


 


                                  


                


 

13 Table 2 shows the electrical conductivity of substances P,Q and R in the solid and molten state.

 


 


 





















Substances

 

Electrical Conductivity
In the molten state In the solid state
P Good

 

Good

 

Q None

 

None

 

R Good

 

None

 


                                                                        Table 2


                                                                     


Which of the following can be deduced from Table 2  ?


 


 







  A

 


B


 


C


 


D

There are no ions in solid R   

 


Substance P is denser than water


 


Substances P and R are electrolytes


 


The particles in substance Q are molecules


          


 






















14 Which of the following is an ionic compound?
  A

 


 

Propane
  B Ammonia

 


 

  C Zinc oxide

 


 

  D Carbon dioxide

 


 


 










15 Impure copper can be purified by using electrolysis. Which of the following pair of electrodes is correct?

 

   

 


A


 


 


B


 


C


 


D

 

















Anode Cathode
Pure copper

 

Impure copper
Impure copper

 

Pure copper

 

Carbon

 

Pure carbon
Carbon

 

Impure carbon

 


 


 






















16 Which of the following is true about weak alkali?

 

  A

 

The pH value is more than 7

 

  B Unable to neutralize acid

 

  C Change blue litmus paper to red

 

  D Ionizes partially in water to produce hydroxide ions

 


 






















17 Which of the following is an insoluble salt?
  A

 

Calcium nitrate

 

  B Potassium nitrate

 

  C Calcium carbonate

 

  D Potassium carbonate

 


 


 






















18 Which of the following mixtures of elements form alloy to make the twenty cents coins?
  A

 

Iron and carbon

 

  B Copper and nickel

 

  C Stanum and copper

 

  D Aluminium and copper

 


 


 


 






















19 Which of the following is a fast reaction?
  A

 

Rusting

 

  B Precipitation

 

  C Fermentation

 

  D Photosynthesis

 






















20 What is the homologous series of methyl ethanoate?
  A

 

Ester

 

  B Alkene

 

  C Alcohol

 

  D Carboxylic acid

 


 


 










21 Which of the following is the molecular formula of propane?

 

  A

 


B


 


C


 


D

C3H6

 


C3H8


 


C3H8O


 


C3H8O2


 


 


 






















22 What is the reaction that changes ethanol to ethene?

 

  A

 

Addition

 

  B Oxidation

 

  C Hydration

 

  D Dehydration

 






















   
     
     
     
     

 










23 What is the oxidation number of hydrogen in sodium hydride, NaH?

 


 

  A

 


B


 


C


 


D

+1

 


-1


 


+2


 


- 2


 


 


 










24 Which of the following pair of type of chemical cell and its positive terminal is

 correct?

   

 


 


A


 


B


 


C


 


D


 


 

 

















Type of chemical cell

Jenis sel kimia

Positive terminal

 

Dry cell

 

Zinc

 

Alkaline cell

 

Zinc

 

Nickel-cadmium cell

 

Nickel(IV) oxide

 

Lead-acid accumulator

 

Lead(II) oxide

 


 


 






















 

 


 


25

 

 


 


The graph shows the cooling curve of naphthalene.


 





PX

Temperature/°C





Q




  R

 


 


                                                                                                                                                                                                                                                  


 Time/s    


 


Why is curve Q obtained in the graph?


 

  A

 

Naphtalene is cooled in impurity state
  B Naphtalene evaporate during cooling process          

 

  C Naphtalene is not stirred during cooling process

 

  D Naphtalene freezes after achieving its freezing point

 






















26  Table shows the relative atomic mass of elements Q and T.          

 












Element Relative atomic mass
Q 32
T 64

 


Which of the following is true about the atoms of elements Q and T ?


 

  A

 

The mass of one atom of Q is 32 g
  B The number of protons in atom T is 64

 

  C 1 mole of Q has the same mass as 1 mole of T

 

  D 2 moles of Q have the same mass as 1 mole of T

 


 






















27  The equation shows the reaction between V and W,

 


                             V      +        2W                        X      +       Y


 


Which of the following statements is true?


 

  A

 

V and W are the products of the reaction
  B X and Y are the reactants of the reaction

 

  C 1 mole of V react with 1 mole of W to produce 1 mole of X and 1 mole of Y

 

  D 1 mole of V react with 2 moles of W to produce 1 mole of X and 1 mole of Y

 


 










28 The table shows the proton number and the nucleon number of atom X.

.


 










Proton number


3


Nucleon number


 


7


 


Which of the following is correct about the position of X in the Periodic Table of elements?


 

   

 


 


 


A


 


B


 


C


 


D


 


 

 


















Group


 


Period


1


 


2


2


1


 


2


 


5


5


 


2


 


 


 


 










29 The diagram shows a part of the Periodic Table of elements.

 















































































                                   
Y                             W    
                                  X
          Z                        

 


 


Which of the following elements W,X,Y and Z in the Periodic Table is suitable to be used in the fluorescent lamps?


 

  A

 


B


 


C


 


D

W

 


X


 


Y


 


Z


 


 










30 Which of the following pair of compounds and its type of bond is correct?

 

   

 


 


A


 


B


 


C


 


D

 

















Compound

Sebatian

Type of bond

 

Ethanol

 

Ionic

 

Zinc sulphate

 

Covalent

 

Sulphur dioxide Ionic

 

Tetrachloromethane

 

Covalent

 


 


 


 






















31 The diagram shows the set up of the apparatus for the electrolysis of copper(II) nitrate solution.

.


 


 
                            


                                 


 


 


 


 


 


 


 


 
Which of the following is produced at copper electrode X?


 

  A

 

Copper

 

  B Oxygen

 

  C Hydrogen ions

 

  D Copper(II) ion

 









































32 The diagram shows the set up of the apparatus of a simple chemical cell.

.


                                


 


Which of the following is metal X?


 

  A

 

Zinc

 

  B Lead

 

  C Magnesium

 

  D Aluminium

 

33 Zinc chloride solution and aluminium chloride solution are colourless solutions.

Which of the following can be used to differentiate the solutions?


 

  A

 

Ammonia solution

 

  B Barium nitrate solution

 

  C Silver nitrate solution

 

  D Sodium hydroxide solution

 






















34 The diagram shows four stages in the conversion of sulphur to sulphuric  acid.

 






Stage IV


 


 


Water


 


 






Stage II


 


      Air


 


 





 Stage III





Sulphuric acid


 






Stage


 I


 


Air


 


 






Sulphur


 


 






Sulphur dioxide


 






Sulphur trioxide


 






Oleum


 






Sulphuric acid


 


 


In which stage is a catalyst used?





Stage II
  A

 

Stage I

 

  B Stage II

 

  C Stage III

 

  D Stage IV

 


 


 






















35 Which of the following polymer is suitable for making water pipes?      

 


                                                 

   

 


A


 


 


 

 

                                           

   

 


B


 


 


 

 

 


 


 

   

 


C


 


 

 

          

   

 


D


 


 

 

          


 


 










36 Which of the following is correct match of properties of rubber X and rubber Y?

 


 


                                                                           


          


 


                            Rubber X                                                    Rubber Y


                                                                                            

     

 






 

 


 


 


 


A


 


 


B


 


 


C


 


 


D


 


 


 

 

















 

Rubber X


 

 

Rubber Y


 

 

More elastic


 

 

Less elastic

 

Stronger and harder


 

 

Weaker and softer


 

 

High melting point

 

Low melting point


 

 

Easy to oxidize


 

 

Difficult to oxidize


 


 


 


 


 


 


 


 


 


 










   
     

 


 


 


 


 


 










37 The molecular formula of butanoic acid is C3H7COOH.  Calculate the relative mecular mass of butanoic acid..

[Relative atomic mass of H = 1, C = 12, O = 16]


 

  A

 


B


 


C


 


D

58

 


68


 


88


 


98


 


 










38 3.1 g  metal oxide M contains 2.3 g of  metal M. Determine the emperical formula of metal oxide M.

[Relative atomic mass of M = 23, O = 16]


 

  A

 


B


 


C


 


D

MO

 


M2O


 


MO2


 


M2O2


 


 






















39 The diagram shows four simple chemical cells. In each cell zinc is used as one of the electrodes.

 


       


 


In which cell does zinc act as the positive terminal?


 

  A

 

Cell S

 

  B Cell R

 

  C Cell P

 

  D Cell Q

 


 


 










40 The table shows information about three simple chemical cells.

 



















Pair of metals Potential difference/V Metal of negative terminal
P and copper

 

 

0.45

 

P

Q and copper

 

 

1.30

 

Q

R and copper

 

 

0.56

 

Cu


 


Based on the information in the table, what is the potential difference of the pair of metals Q and R?


 

  A

 


B


 


C


 


D

0.74

 


0.85


 


1.01


 


1.86


 


 










41 The equation shows the decomposition of a copper(II) nitrate salt.




  2Cu(NO3)                      2CuO  +  4NO2  +  O2

        


 


 
Calculate the volume of nitrogen dioxide, NO2 gas at room condition if 0.1 mol of Cu(NO3)2 salt is heated.


Molar volume = 24 dm3 mol-1 at room conditions


 

  A

 


B


 


C


 


D

0.6 dm3

 


1.2 dm3


 


2.4 dm3


 


4.8 dm3


 


 


 


 






















42 A farmer discovered that his vegetables were not growing well because the soil was acidic. Which of the following substances can be used to overcome the problem?

 


 

  A

 

Zinc oxide

 

  B Calcium oxide

 

  C Sodium hydroxide

 

  D Magnesium hydroxide

 


 


 










43 The table shows the volume of oxygen gas released for the decomposition of hydrogen peroxide.

 


        























 

Time (s)


 

 

0


 

 

30

 

60

 

90

 

120

 

150

 

180

 

210

 

Volume of oxygen (cm3)


 

 

0.0

 

6.6

 

12.5

 

17.9

 

23.0

 

27.8

 

31.8

 

35.2


 


What is the average rate of reaction in the third minutes?


 

  A

 


B


 


C


 


D

0.11 cm3s-1

 


0.13 cm3s-1


 


0.15 cm3s-1


 


0.18 cm3s-1


 


 






















44 In an experiment, the reaction between 25 cm3 of 0.1 mol dm-3 nitric acid with excess zinc produces hydrogen gas. The graph of the volume of hydrogen gas against time is sketched. A curve T is obtained.

 


 





Volume of hydrogen gas/cm3

 


 





U




T




               Time/second

                   Masa/saat


 


If the experiment is repeated using another solution, which solution will produce curve U?


 

  A

 

25 cm3 of 0.2 mol dm-3 nitric acid

 

  B 30 cm3 of 0.1 mol dm-3 nitric acid

 

  C 50 cm3 of 0.05 mol dm-3 nitric acid

 

  D 100 cm3 of 0.05 mol dm-3 nitric acid

 


 










45 The equation represents the combustion reaction of butene with oxygen.

.





  C4H+  6O2                              4CO2  +  4H2O

 


 
What is the volume of carbon dioxide gas given out when 20 cm3 of butene is burnt completely in excess oxygen?


 

  A

 


B


 


C


 


D

20 cm3

 


40 cm3


 


60 cm3


 


80 cm3


 


 










46 Alcohol X react with carboxylic acid Y  to   form  the ester shown below.

 


 


Which of the following could be alcohol X and carboxylic acid Y?

   

 


A


 


B


 


 


C


 


D


 


 


 

 

















Alcohol X Carboxylic acid Y
Butanol

 

Ethanoic acid
Etanol

 

Butanoic acid
Butanol Propanoic acid

 

Butanol

 

Butanoic acid

 


 


 


 


 


 


 










47 The following is a half equation for a redox reaction.

 





  Cr2O72-  +  14H+  qe-                              2Cr3+  +  7H2O

 


 


 
What is the value of q?


 

  A

 


B


 


C


 


D

3

 


6


 


7


 


9


 


 










48 Diagram 6 shows the steps taken to prepare a standard solution.

.


            





Step P                 Step Q                             Step R                      Step S

 


 


 


 
Diagram 6


Arrange the steps in the correct order of preparing a standard solution.i.


 

 

 


 


 


 


 


 


 


 


 

A



B




C



D


 

S, Q, R and P

 


S, R, P,and Q


 


Q, P, R and S


 


P, R, S and Q


 


 























































   
 

 


 


 


 


 


49

 

 


 


 


 


 


Which of the following facts is matched correctly?


 

   

 


 


 


A


 


B


 


C


 


D


 


 


 


50

 






















Chemical formula

 

Types of acids Basicity of acid

 

HNO3 Weak acid

 

3
H2CO3 Strong acid

 

2
HCl Weak acid

 

1
H2SO4 Strong acid

 

2

 


 


Which of the following contains the highest number of moles of hydroxide ions?


A   20 cm3 of 1.0 mol dm-3 potassium hydroxide


B   50 cm3of 0.5 mol dm-3 sodium hydroxide


C   50 cm3 of 2.0 dm-3 aqueous ammonia


D   20 cm3 of 1.0 mol dm-3 magnesium hydroxide


 


 


 


 


 


 


 


 


 


 


END OF QUESTION PAPER


 


 

   
     
   
     
   
     
   
     
   
     
           

 

















































































































































































































   
     
   
     
   
     
   
     
   
     
   
     
     
   
     
   
     
     
     
     
     
   
   
   
 

 


 


 

 

 


 


 


 

   
     
     
     
     
     
   
   
     
     
     
     
   
   
     
     
     
     
   
     
   
     
     
     
     
     
     
     
     
     
       

 


 


 


 


 


 


 


 


 


 


 


 


 


 


 

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