N2 (g) + 3H2 (g) → 2NH3(g)

Name:……………………………………….. College no: …………………………….

Class : ………………………………Teacher’s name : ………………………………..

MAKTAB RENDAH SAINS MARA

PENGKALAN CHEPA

STANDARDIZED TEST 1 SEM 2, 2011CHEMISTRY

FORM 41 1/2 HOURS

INSTRUCTIONS:

This booklet contains of 13 printed pages including the front page.

Section A:Objective Questions

1 The equation shows the reaction of nitrogen, N2 and hydrogen, H2 to form ammonia, NH3.

Section Question Full mark

Marks

A OBJECTIVE(20)

20

B 1 102 103 10

C 1 20

TOTAL 70

%

1. This question paper consists of THREE sections: Section A ,B AND C

2. Answer all questions.show your working, it may help you to get marks.

3. If you wish to cancel any answer, neatly cross out the answer

4. The diagrams in the questions provided are not drawn to scale unless stated.

5. You may use a non-programmable scientific calculator.

Based on the equation, how many moles of ammonia is formed if 2 moles of nitrogen react with 6 moles of hydrogen?

A 2B 4C 5D 6

2. The diagram shows the arrangement of atoms of a substance.

Which of the following substances has the same arrangement of atoms as in the diagram?

A Aluminium

B Copper

C Brass

D Iron

3. Which of the following pairs is correct monomer for the polymer?

Monomer Polymer

A Ethene Polythene

B Glucose Protein

C Amino acid Carbohydrate

D Isopropene Nylon

4. Which of the following substances is found in a photochromic glass?

A Plastic and ceramic

B Glass and silver chloride

C Plastic and sodium chloride

D Ceramics and silver chloride

5. Which of the following chemical equations represents the formation of oleum

in Contact Process?

A S + O2 → SO2

B 2 SO2 + O2 → 2 SO3

C SO3 + H2SO4 → H2S2O7

D H2S2O7 + H2O → 2 H2SO4

6. An alloy which is used to make surgical forceps has the following composition:

Iron - 74 %Chromium - 18 %Carbon - 8 %

This alloy is strong and does not corrode easily. What is this alloy?

A BronzeB PewterC DuraluminD Stainless steel

7. Pure metals are ductile and malleable. This is because

A atoms can move freelyB layers of atoms can slide easilyC bonding between atoms are weakD atoms are orderly and closely packed

8. Why is ceramic used for the wall of a nuclear reactor

A. ceramic is very hardB. Ceramic is malleable

C. Ceramic is inert towards chemicalsD. Ceramic can with stand high temperature

9 Which of the following pairs is correct?

Industrial process Product Catalyst A Contact process Sulphuric acid Platinum B Haber process Ammonia Iron C Cracking process Hydrocarbon Vanadium(II) oxide D Ostwald process Hydrochloric acid Copper

10. In order to produce as glass that is more resistant to heat and chemicals, substance X is added to soda lime glass in the manufacturing process. What is X?

A. Boron oxideB. Lead (II) oxideC. Sodium carbonate

D Calcium carbonate

11. Which of the following substance is electrolyte?

A. AlcoholB. Copper(II) chlorideC. Glucose solutionD. Mercury

12. Figure 1 shows the set-up of apparatus for the electrolysis of ferum(II) sulphate solution.

Figure 1

What is formed at carbon electrode X ?

A. FerumB. OxygenC. Sulphur dioxideD. Hydrogen gas

13. Electrolyte can conducted electricity because an electrolyte

A. is a metalB. contains mobile ionsC. allows the flow of electronsD. conducts electricity in the aqueous form

14. Table 1 shows the results of an experiment for three chemical cells.Chemical cell Metal pairs Negative terminal Cell voltage / V

X P and R R 1.9Y R and S S 0.8Z Q and R R 0.3

Table 1Which of the following can be deduced from table1?

I. The cell voltage is 1.6 V when P and Q are used as electrodes.II. The cell voltage is 1.1 V when P and S are used as electrodes.III. Electrons flow from terminal Q to terminal S in the metal pair Q and S.IV. P functions as a positive terminal when it is paired with Q, R or S in a cell.

A. I and IV onlyB. II and III onlyC. I, II and III onlyD. I, II, III and IV

Dilute ferum(II) sulphate solution

Carbon electrode Y

Carbon electrode X

Figure 3

15. Copper is above silver in the Electrochemical Series. An experiment is set up as shown in figure 3. Which of the following occur?

I The solution around the copper foil turns blue.II Silver crystals slowly form on the silver foil.III Electrons flow in the direction shownIV The bulb glows.

A. I, II and III onlyB. I and III onlyC. II and IV onlyD. I, II, III and IV

16. The above equation represents a reaction in a chemical cell. Which of the following statements is TRUE.

A. zinc electrode is the positive terminalB. Copper ions receive electronsC. Electron flows from the copper rod to the zinc rod.D. The copper rod is more electropositive then the zinc rod.

Silver foil

Silver nitrate solution

Copper foil

Sodium sulphate solution

Zn + Cu2+ Cu + Zn2+

17. 10 ml of copper(II) sulphate solution was left in an iron cup overnight. Which of the following statements describes what happened?

A. the solution evaporated completely and some copper(II) sulphate crystals were left behind.

B. The part of the container in contact with the solution was coated with copper.

C. Some fine iron particles were formed in the solution.D. The solution turned colorless.

18. Which of the following ions attracted to cathode during electrolysis of copper(II) sulphate solution?

A. ion copper(II) only.B. ion copper(II) and ion sulphate.C. Ion copper(II) and ion hydrogen.D. Ion hydrogen and ion hydroxide.

19. Which of the following combination can be used in electroplating iron spoon with nickel metal?

Cathode Anode Electrolytes

A. Iron spoon nickel nickel(II) sulphate solutionsB. Nickel iron spoon nickel(II) sulphate solutionsC. Iron spoon nickel iron(II) sulphate solutionsD. Nickel iron spoon iron(II) sulphate solutions

20. In the electrolytic manufacture of aluminium, what is the anode (positive electrode) made of?

A. copperB. graphiteC. platinumD. steel

SECTION B: SUBJECTIVES

1 Diagram 1 shows the manufacture of sulphuric acid.

(a) (i) What is the name of this process?

…………………………………………………………………………………..

[1 mark]

(ii) State the name of catalyst X.

…………………………………………………………………………………..

[1 mark]

(iii) State the name of substance Y.

…………………………………………………………………………

[1 mark]

(iv) Substance Y is formed when sulphur trioxide reacts with concentrated sulphuric acid. Write the chemical equation for this reaction.

………………………………………………………………………… [2 mark]

DD

sulphuric acid, H2SO4

Substance Y

Waste gas

sulphurSO2 +

catalys

SO3

water

Dry air

Concentrated sulphuric acid

(b) Ammonia is manufactured for industrial purposes through a process

(i) State 3 conditions for the manufacture of ammonia

………………………………………………………………………………………………

………………………………………………………………………………………………

……………………………………………………………………………………………

[3 marks]

(ii) State 2 uses of ammonia in industry

…………………………………………………………………………………………

…………………………………………………………………………………………

[ 2 marks]

2. (A)Figure 1 below shows the apparatus arrangement to study the electrolysis of dilute

copper(II) nitrate.

Figure 1

a) Identify the cathode and the anode on the figure above by writing the word “cathode” and “anode” in the figure.

[1 marks]

b) State the energy changes that occur in the process.

______________________________________________________________

[1 mark]

A

carbon electrode X

copper(II) nitrate solutioncarbon electrode Y

c) Write down all the formulae of ions present in the copper(II) nitrate solution.

__________________________________________________________

__________________________________________________________

[2 marks]

d) What observations can be made at(i) X?

___________________________________________________________

[1 mark](ii) Y?

__________________________________________________________ [1 mark ]

(B) Figure 2 below shows the apparatus arrangement to study the electrolysis of

molten lead (II) bromide.

a) Write the half equation for the reaction occurred i) At the anode :

____________________________________________________

ii) At the cathode

____________________________________________________

[ 2marks]

b) Name the substances formed at each of the electrodes

i) Anode : _________________________________________________

ii) Cathode : _______________________________________________[ 2marks ]

3)

A) Diagram below shows a Daniel cell

a) Mark the positive and negative electrodes on the diagram [ 1m]

b) What is the function of the porous pot? [ 2m]

________________________________________________________________

________________________________________________________________

c) State an observation at the zinc electrode after 5 minutes [ 1m]

________________________________________________________________

d) Write half equation at the copper electrode [1m]

________________________________________________________________

e) If the copper electrode is replaced with an iron electrode, what will be the change in voltmeter reading? Explain your answer [2m]

________________________________________________________________

________________________________________________________________

B) A student wish to electroplate an iron key with silver. Draw a labeled diagram to show how this can be carried out in a laboratory. [ 3m]

SECTION C:Essay

a) i) Explain the meaning of alloy [2 marks]

ii) Diagrams A and diagram B below shows arrangement of atoms in 2 different substances.

Suggest what substance A is and substance B. Explain why the arrangement in B gives a better property than the

arrangement in A. [6 marks]

iii) Give two advantages of alloy [2 marks]

b) Diagram below is a synthetic polymer.

i) Name the polymer above and also name its monomer [2 marks]

ii) State 2 ways to reduce the pollution caused by synthetic polymer [2 marks]

iii) Which type of glass is used for lab apparatus? Explain your answer [3 marks]

v) Photochromic glass is a glass that is sensitive towards light.

State one use of photochromic glass and explain its use [3marks]

Diagram A Diagram B

No. Answers MarksQUESTION 1

1.a (i) Contact process 1(ii) Vanadium(V) oxide 1

(iii) Oleum 1(iv) SO3 + H2SO4 H2S2O7

1m 1m2

1.b(i) Temperature: 450-550oCPressure : 200atmCatalyst : Iron

111

bii) - Manufacturing of fertilizer- Manufacturing of nitric acid

11

QUESTION 22.(A) a X – anode

Y - cathode1

2.b Electrical energy to chemical energy 12.c Cu2+ , NO3

- , H+ , OH- 2d(i) Colourless gas released 1

d(ii) Brown solid deposited 12(B)a (i) 2Br- Br2 + 2e-

(ii) Pb2+ + 2e- Pb11

b) (i) anode : Bromine gas(ii) cathode: Lead metal

11

QUESTION 33(A)

a) Zinc: negative terminalCopper: positive terminal

1

b) - allow the movement of ions between two solution- prevent two solutions from mixing

11

c) Electrode becomes thinner 1d) Cu2+ + 2e- Cu 1e) - Voltmeter reading decrease

- distance between Zn and Fe is shorter than Zn and Cu in Electrochemical Series11

3(B)

Functional diagram-1m

Correct electrode-1m

Correct electrolyte-1m

SKEMA JAWAPAN FORM 4 (SELARAS 1 SEM2 2011):

Essay:

No. Answers Marksa)i) A mixture of metals in a fixed composition to improve the properties of

a particular metal1

a)ii) Substance A: Pure metal; substance B: Alloy In pure metal, atoms are the same size The atoms are in orderly arrangement The layers of atoms in pure metal can slide over one another when

force is given In alloy, different atoms have different size The presence of atoms of other metals disturb the orderly

arrangement of atoms in the metal This prevent the layer of atoms from sliding when force is given

111

11

11

a)iii) -Stronger and harder-Resistant towards corrosion-Have a better furnish and lustre

Any 2 (2marks)

b)i) Polymer: PolytheneMonomer: Ethene

11

b)ii) - Reduce ,reuse and recycle synthetic polymer- Use biodegradable polymers

11

b)iii) - Borosilicate glass // Fused glass- Resistant towards chemical attack- Heat resistant

111

b)iv) - Use: Optical lenses, car windshields, smart energy efficient windows in buildings, information display panels, lens in cameras, optical switches and light intensity meters- Because it darkens the glass when exposed to sunlight -due to presence of silver chloride

111

Objectives

1 2 3 4 5 6 7 8 9 10

B C A B C D A D B A

11 12 13 14 15 16 17 18 19 20

B B B A A B B C A B