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- 1. Multiple Choice
The reaction between zinc and hydrochloric acid is represented by the following chemical equation:
Tindakbalas antara zink dengan asid hidroklorik diwakili oleh persamaan kimia berikut
Zn + 2HCl → ZnCl2 + H2
Which of the following methods is the most suitable to determine the rate of the above reaction?
Antara kaedah berikut yang manakah paling sesuai untuk menentukan kadar bagi tindak balas di atas
Determine the change in temperature of the solution with time Menentukan perubahan suhu larutan berkadar dengan masa
Determine the change in the concentration of zinc chloride with time
Menentukan perubahan kepekatan zink berkadar dengan masa
Determine the volume of hydrogen gas given off with time
Menentukan isipadu gas hidrogen yang dihasilkan berkadar dengan masa.
Determine the change in the concentration of hydrochloric acid with time
Menentukan perubahan kepekatan asid hidroklorik berkadar dengan masa,
- 2. Multiple Choice
The graph shows the volume of hydrogen gas produced against time for the reaction between zinc and sulphuric acid.
Graf menunjukkan isipadu gas hydrogen yang dibebaskan melawan masa bagi tindakbalas antara zink dan asid sulfurik..
The gradient of the graph decreases with time because
Kecerunan graf berkurang dengan masa kerana
catalyst is not used.
mangkin tidak digunakan
volume of mixture decreases
isipadu campuran berkurang
temperature of reaction decreases
suhu tindak balas berkurang
concentration of sulphuric acid decreases
kepekatan asid sulfurik berkurang
- 3. Multiple Choice
Diagram 3 shows the graph of the volume of gas produced against time for the reaction between calcium carbonate and hydrochloric acid.
Rajah 3 menunjukkan graf isipadu gas yang terhasil melawan masa untuk tindak balas antara kalsium karbonat dan asid hidroklorik.
The gradient of the curve decreases with time because
Kecerunan lengkung berkurang dengan masa kerana
hydrochloric acid is a type of monoprotic acid
asid hidroklorik adalah sejenis asid monobes
temperature of reaction decreases
suhu tindak balas berkurang
volume of mixture decreases
isipadu campuran berkurang
concentration of hydrochloric acid decreases
kepekatan asid hidroklorik berkurang
- 4. Multiple Choice
Which factor does not affect the rate of reaction?
Faktor manakah yang tidak mempengaruhi kadar tindak balas?
Volume of reactant
Isipadu bahan tindak balas
Concentration of reactant
Kepekatan bahan tindak balas
Temperature of reactant
Suhu bahan tindak balas
Size of solid reactant
Saiz pepejal bahan tindak balas
- 5. Multiple Choice
The time taken for 2 g of magnesium powder to react completely with excess hydrochloric acid is 5 minutes. What is the average rate of the reaction?
Masa yang diambil untuk 2 g serbuk magnesium bertindak balas lengkap dengan asid hidroklorik berlebihan ialah 5 minit.
Berapakah kadar purata bagi tindak balas ini?
0.4 g s-1
0.4 g min-1
2.5 g s-1
2.5 g min-1
- 6. Multiple Choice
Table 6 shows the volume of gas release at interval time of 30 seconds in an experiment to determine the rate of reaction .
Jadual 6 menunjukkan isipadu gas yang terbebas pada sela masa 30 saat dalam satu eksperimen untuk menentukan kadar tindak balas.
What is the average rate of reaction in the second minute?
Apakah kadar tindak balas purata dalam minit kedua?
0.06 cm3s-1
0.12 cm3s-1
0.37 cm3s-1
7.00 cm3s-1
- 7. Multiple Choice
Magnesium reacts with hydrochloric acid according to the equation below:
Magnesium bertindak balas dengan asid hidroklorik berdasarkan persamaan di bawah:
Mg (s) + 2HCl (aq) ----> MgCl2 (aq) + H2 (g)
Which of the following graphs of volume (V) of hydrogen gas against time (t) is correct?
Manakah antara graf isipadu(V) gas hydrogen melawan masa(t) berikut adalah betul?
- 8. Multiple Choice
Which of the following explain the meaning of effective collision?
Antara pernyataan berikut, yang manakah menjelaskan maksud perlanggaran berkesan?
The collision where its energy is less than activation energy
Tindak balas yang tenaganya kurang daripada tenaga pengaktifan
The collision that has low energy
Perlanggaran yang mempunyai tenaga yang rendah
The collision that produces the product
Perlanggaran yang menghasilkan hasil tindak balas
The collision which take place before a reaction
Perlanggaran yang berlaku sebelum sesuatu tindak balas
- 9. Multiple Choice
Which process has the lowest rate of reaction?
Proses manakah yang mempunyai kadar tindak balas yang paling rendah?
Combustion
Pembakaran
Fermentation
Penapaian
Neutralisation
Peneutralan
Photosynthesis
Fotosintesis
- 10. Multiple Choice
Which of the following factors does not affect the rate of a reaction?
Antara faktor-faktor berikut, yang manakah tidak mempengaruhi kadar sesuatu tindak balas?
The presence of a catalyst
Kehadiran mangkin.
The concentration of the reactant
Kepekatan bahan tindak balas
The total surface area of the solid reactant
Jumlah luas permukaan bahan tindak balas pepejal
The mass of the solid reactant
Jisim bahan tindak balas pepejal
- 11. Multiple Choice
The rate of chemical reaction can be determined by measuring
Kadar tindak balas boleh ditentukan dengan mengukur
I the volume of gas liberated per unit time.
isipadu gas dibebaskan per unit masa.
II the formation of precipitate per unit time.
pembentukan mendakan per unit masa.
III the change of colour per unit time.
perubahan warna per unit masa.
IV the change of the size of solid per unit time.
perubahan saiz pepejal per unit masa
I and III only
I dan III sahaja
I,II and III only
I,II dan III sahaja
II,III and IV only
II,III dan IV sahaja
I,II,III and IV
I,II III dan IV
- 12. Multiple Choice
Which of the following is the slowest reaction?
Antara yang berikut, yang manakah tindak balas paling perlahan?
A few manganese(IV) oxide powder is added to hydrogen peroxide solution
Sedikit serbuk mangan(IV) oksida ditambahkan ke dalam larutan hidrogen peroksida
Lead(II) nitrate solution is added to sodium chloride solution
Larutan plumbum(II) nitrat ditambahkan ke dalam larutan natrium klorida
Dilute sulphuric acid is added to sodium thiosulphate solution
Asid sulfurik cair ditambahkan ke dalam larutan natrium tiosulfat
A few zinc powder is added to copper(II) sulphate solution.
Sedikit serbuk zink ditambahkan ke dalam larutan kuprum(II) sulfat
- 13. Multiple Choice
The following information shows the effect of a particular factor on the rate of reaction.
Maklumat berikut menunjukkan kesan suatu faktor yang mempengaruhi kadar tindak balas.
Adding a catalyst.
Menambah mangkin
Increasing temperature of reactants
Menaikkan suhu bahan tindak balas
Increasing the concentration of reactants.
Menambah kepekatan bahan tindak balas
Increasing total surface area of reactants.
Menambah jumlah luas permukaan bahan tindak balas
- 14. Multiple Choice
Figure 15 shows the graph of total volume of carbon dioxide against time for the reaction of a metal carbonate with dilute acid for experiment P and experiment Q.
Rajah 15 menunjukkan graf bagi jumlah isipadu karbon dioksida melawan masa bagi tindak balas karbonat logam dengan asid cair bagi eksperimen P dan
eksperimen Q.
Which of the following explains the differences between both curves from the experiments?
Antara berikut, yang manakah menerangkan perbezaan antara dua lengkuk bagi eksperimen tersebut?
I Temperature of acid in experiment P is higher than in experiment Q
Suhu asid dalam eksperimen P lebih tinggi daripada dalam eksperimen Q
II Catalyst is used in experiment P but not in experiment Q
Mangkin digunakan dalam eksperimen P tetapi tidak dalam eksperimen Q
III Quantities of metal carbonate and acid used in experiment P are more than that in experiment Q
Kuantiti karbonat logam dan asid dalam eksperimen P melebihi dalam eksperimen Q
IV Small particle size of metal carbonate is used in experiment P and big particle size of metal carbonate is used in experiment Q
Saiz zarah karbonat logam yang kecil digunakan dalam eksperimen P dan saiz zarah karbonat logam yang besar digunakan dalam eksperimen Q
III and IV only
I , II and III only
I, II and IV only
I, II , III and IV
- 15. Multiple Choice
Figure 16 shows the graph of total volume of oxygen gas released against time for the decomposition of hydrogen peroxide.
Rajah 16 menunjukkan graf bagi jumlah isipadu gas oksigen yang terbebas melawan masa untuk penguraian hidrogen peroksida.
Which of the following is the inference from the graph?
Manakah yang berikut adalah inferens daripada graf ?
I Rate of gas released at t2 is zero/Kadar pembebasan gas pada t2 adalah sifar
II The average rate of gas released in duration t1 is V/t1 cm3 min-1/Purata kadar pembebasan gas dalam tempoh t1 ialah V/t1 cm3 min-1
III Rate of gas released at the initial reaction is highest/ Kadar pembebasan gas pada permulaan tindak balas adalah paling tinggi
IV Decomposition of hydrogen peroxide decreases with time/Penguraian hidrogen peroksida berkurangan dengan masa.
I , II and III only
I, III and IV only
II, III and IV only
I,II ,III and IV
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