Kadar Tindak Balas
5th grade
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Chemistry
19 minutes ago
krkazimarba
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15 QuestionsShow answers
  • Question 1
    30 seconds
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    Q.

    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

    answer choices

    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,

  • Question 2
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    Q.

    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

    answer choices

    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

  • Question 3
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    Q.

    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

    answer choices

    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

  • Question 4
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    Q.

    Which factor does not affect the rate of reaction?

    Faktor manakah yang tidak mempengaruhi kadar tindak balas?

    answer choices

    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

  • Question 5
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    Q.

    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?

    answer choices

    0.4 g s-1

    0.4 g min-1

    2.5 g s-1

    2.5 g min-1

  • Question 6
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    Q.

    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?

    answer choices

    0.06 cm3s-1

    0.12 cm3s-1

    0.37 cm3s-1

    7.00 cm3s-1

  • Question 7
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    Q.

    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?

    answer choices
  • Question 8
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    Q.

    Which of the following explain the meaning of effective collision?

    Antara pernyataan berikut, yang manakah menjelaskan maksud perlanggaran berkesan?

    answer choices

    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

  • Question 9
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    Q.

    Which process has the lowest rate of reaction?

    Proses manakah yang mempunyai kadar tindak balas yang paling rendah?

    answer choices

    Combustion

    Pembakaran

    Fermentation

    Penapaian

    Neutralisation

    Peneutralan

    Photosynthesis

    Fotosintesis

  • Question 10
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    Q.

    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?

    answer choices

    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

  • Question 11
    45 seconds
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    Q.

    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

    answer choices

    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

  • Question 12
    30 seconds
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    Q.

    Which of the following is the slowest reaction?

    Antara yang berikut, yang manakah tindak balas paling perlahan?

    answer choices

    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

  • Question 13
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    Q.

    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.

    answer choices

    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

  • Question 14
    45 seconds
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    Q.

    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

    answer choices

    III and IV only

    I , II and III only

    I, II and IV only

    I, II , III and IV

  • Question 15
    60 seconds
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    Q.

    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.

    answer choices

    I , II and III only

    I, III and IV only

    II, III and IV only

    I,II ,III and IV

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