Mid Term Chem Exm

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    1. Baking soda is an essential ingredient in the baking of cakes and bread. It isused to help dough rise. What chemical does baking soda contain?

    A Carbon dioxideB Sodium chlorideC Calcium carbonateD Sodium hydrogen carbonate

    2. The diagram shows the arrangement of molecules in the three states ofmatter.Rajah menunjukkan susunan molekul dalam tiga keadaan jirim.

    Which the correct states of matter for K, L and M?Yang manakah menunjukkan keadaan jirim yangbetulbagi K, L dan M?

    K L MA Gas Liquid Solid

    Gas Cecair PepejalB Gas Solid Liquid

    Gas Pepejal CecairC Solid Liquid Gas

    Pepejal Cecair Gas

    D Liquid Gas SolidCecair Gas Pepejal

    3. The symbol of boron atom can be written as B11

    5 .

    The nucleus of this boron atom contains

    Simbol bagi atom boron boleh ditulis sebagai B11

    5 .

    Nukleus bagi atom boron mengandungi

    A 5 protons and 6 neutrons5proton dan 6 neutron

    B 5 neutrons and 6 protons5neutron dan 6 proton

    C 5 protons and 6 electrons5proton dan 6 elektron

    D 6 neutrons and 5 electrons6 neutron dan 5elektron

    MLK

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    4. Which compound are the correct formulae?Formula sebatian yang manakah betul?

    A Ammonia NH4Ammonia

    B Carbon monoxide CO2karbon monoksida

    C Iron(III)oxide Fe3O2Ferum(III)oksida

    D Zinc hydroxide Zn(OH)2

    5 Phosphorus is in Group 15 in the periodic table. It has chemical propertiessimilar to...Fosfurus berada di dalam kumpulan 15 jadual berkala. Ia mempunyai sifat kimiayang sama dengan

    A sulphur has electron arrangement 2.8.6sulfur yang mempunyai susunan elektron 2.8.6

    B nitrogen has proton number 7nitrogen yang mempunyai nombor proton 7

    C boron has electron arrangement 2.3.boron yang mempunyai susunan elektron 2.3

    D fluorine has proton number 9.flourin yang mempunyai nombor proton 9

    . 6. An atom that receives an electron formsAtom yang menerima elektron membentuk

    A a cationB an anionC an ionic bondD a covalent bond

    7. Atom S has proton number of 20 and forms an ion with electron arrangementof 2.8.8. What is the charge of ion formed?

    Atom S mempunyai nombor proton 20 dan membentuk ion dengan susunanelektron 2.8.8. Apakah cas bagi ion yang terbentuk?

    A +1B +2C 1

    D 2

    8. The boiling point of a substance X is 78 oC and its melting point is -5oC. What isthe physical state of substance X at -8oC and 80oC?Takat didih bahan X ialah 780C dan takat leburnya ialah -50C. Apakah keadaanfizikal bahan X pada suhu -80C dan 800C?

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    Diagram 5 Rajah 5

    Which of the following statements is true?Antara pernyataan yang berikut, manakah benar?AAt point PQ, kinetic energy increases as temperature decreases.

    Pada titik PQ, tenaga kinetik bertambah apabila suhu menurun.BAt point QR, all forces of attraction between particles become weak.

    Pada titik QR, semua daya tarikan antara zarah -zarah menjadi lemah.CAt point R, all the gasXhas completely melted.

    Pada titik R, semua gas X telah melebur keseluruhannya.DAt point RS, heat is released to the environment.

    Pada titik RS, haba dibebaskan ke persekitaran.

    11.Which of the following diagrams shows the same valence electrons arrangement as fluorine? Antara rajah yang berikut, manakah menunjukkan susunan elektron vale ns yang sama denga

    A C

    B D

    12. This isotopes produces gamma radiotion to kill cancer cells. What is the isotope?Isotop ini menghasilkan sinar gamma untuk membunuh sel kanser. Apakah isotop ini?

    A Iodine-131Iodin-131

    B Cobalt-60

    Kobalt-60C Sodium-24

    Natrium-245

    Carbon-12Karbon-12

    13. What is the mass of 2.4 1021 molecules of CO3?[Relative atomic mass: C, 12; O, 16; Avogadros constant = 6.02 10 23 mol1 ]Berapakah jisim bagi 2.4 1021 molekul CO3?[Jisim atom relatif: C, 12; O, 16; Pemalar Avogadro = 6.02 1023 mol1]

    A 0.02 g C 0.11 gB 0.01 g D 0.24 g

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    14. The following shows the relative formula mass of several compound, which is True?Yang berikut menunjukkan jisim formula relatif bagi beberapa sebatian. yangmanakah benar? (Relatif atomic mass: H,1 ; C,12 ; N, 14 ; O,16 ; Mg, 24 ;K, 39 )

    Compound Relative formula massSebatian Jisim formula relative

    A CO2 40B NH3 16C K2O 94D MgO 45

    15. Calculate the volume of distilled water needed to mix with 11.7 g of sodiumchloride to get a solution of 1.7 mol dm3 sodium chloride.[Relative atomic mass: Na, 23; Cl, 35.5]Hitungkan isi padu air suling yang diperlukan untuk bercampur dengan 11.7 gnatrium klorida supaya menghasilkan larutan 1.7 mol dm3 natrium klorida

    A 120 cm3B 300 cm3C 3000 cm3D 6000 cm3

    16. A concentration of 0.75 mol dm3 of sulphuric acid is used as an electrolyte ina car battery. What is the volume of electrolyte of 0.18 mole of sulphuricacid?

    Asid sulfurik yang berkepekatan 0.75mol dm3 digunakan sebagai elekrolitdalam bateri kereta. Berapakah isi padu elektrolit bagi 0.18 mol asid sulfurik?

    A 240 cm3 C 488 cm3

    B 333 cm3 D 560 cm3

    17. Which of the following gases occupies the smallest volume at STP?Di antara gas yang berikut yang manakah isipadu yang paling kecil pada STP?

    (Relative mass: NH3 = 17; CO= 28 ; O2 = 32 ; Cl2 = 71)

    1 mole of gas occupies 22.4 dm3 at STP

    A 4.0 g of ammonia,NH3B 2.0 g of Carbon monoxide, COC 3.0 g of oxygen.,O2D .4.0 g of chlorine, Cl2

    18. Which of the following chemical equantion is not balanced?Di antara persamaan kimia berikut yang manakah tidak seimbang?

    A 2 Fe + 3 Cl2 2 FeCl3B 2CuO + C 2 Cu + CO2C Zn + H2S04 ZnSO4 + H2D Mg + HCl MgCl2 + H2

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    19. Which halogens exist as gas at room temperature and pressure?Halogen manakah yang wujud sebagai gas pada suhu dan tekanan bilik?

    HalogenMelting point/ CTakat Lebur/oC

    Boiling point/ CTakatDidih/C

    Fluorine -220 -188

    Chlorine -101 -34

    Bromine -7 59

    Iodine 113 184

    A Chlorine and bromineKlorin dan bromin

    B Chlorine and iodineKlorin dan iodin

    C Fluorine and chlorineFlorin dan Klorin

    D Iodine and FluorineIodine dan fluorine

    20. Which one of the following elements is a metal?Yang manakah diantara unsur berikut merupakan logam?

    ElementUnsur

    Electron ArrangementSusunanelektron

    A K 2.4

    B L 2.8.2

    C M 2.8.5

    D N 2.8.8

    21. Diagram 1 shows the positions of four elements R, S, Tand Uin the periodicTable.Rajah 1 menunjukkan kedudukan empat unsur R, S, T dan U di dalam JadualBerkala

    R S

    T U

    Diagram 1

    Rajah 1

    Which of the following statements is true about R, S, Tand U?Yang manakah di antara pernyataan berikut benar tentang R, S, T dan U?

    A Rwill reacts with Uto form a compound.R bertindak balas dengan U membentuk satu sebatian

    B The proton number decreases in the following order of R,S, Tand U.Nombor proton berkurang di dalam tertib R,S,T dan U

    C Tand Uare solids at room temperature.T dan U adalah pepejal pada suhu bilik.

    D The proton number increases in the following order of R, S, Tand U.

    Nombor proton bertambah di dalam tertib R,S,T dan U.

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    22. Which of the following physical properties are true about Group 18 elementsdown the group?

    Antara sifat fizikal yang berikut, manakah benar tentang Kumpulan 18 apabilamenuruni kumpulan?

    I Atomic radius decreases.Jejari atom berkurang.

    II All noble gases are insoluble in water.Semua gas adi tidak larut dalam air.

    III Density increases.Ketumpatan semakin bertambah.

    IV Melting point and boiling point increases.Takat lebur dan takat didih semakin meningkat.

    A I, II and III onlyI, II dan III sahaja

    B I, II and IV onlyI, II dan IV sahaja

    C I, III and IV onlyI, III dan IV sahaja

    D II, III and IV onlyII, III dan IV sahaja

    23. Which of the following is true?Antara yang berikut, manakah benar?

    ElementUnsur

    UsesKegunaan

    A HeliumHelium

    Fill the electric bulbs.Mengisi mentol elektrik.

    B NeonNeon

    Fill weather ballons.Mengisi belon kaji cuaca.

    CArgonArgon

    Fill lights in board advertising.Mengisi lampu pada papan iklan.

    D KryptonKripton

    Fill the flash-lamps of cameras.Mengisi lampu flash kamera.

    24. The atomic si e decreases across the period because of theSaiz atom semakin berkurang apabila merentasi kala kerana

    A increase in the electrostatic forces.daya elektrostatik bertambah.

    B number of shells increase across the period.bilangan petala bertambah apabila merentasi kala.

    C valence electrons which are further from the nucleus.elektron valens lebih jauh daripada nukleus.

    D decrease in the melting point across the period.takat lebur menurun apabila merentasi kala.

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    Numberofprotons Numberofelectrons

    A 20 20

    B 20 18C 16 18

    D 16 16

    28. The diagram 4 shows the electron arrangement of a substance formed between two

    atoms of Z.Rajah 4 menunjukkan susunan electron bagi satu bahan yang terbentuk di antara2 atom Z

    Diagram 4Rajah 4

    Which of the following statements is true about the substance?Pernyataan manakah berikut betul bagi bahan ini?

    ABCD

    Consists of ionsConduct electricity in molten stateThe compound has a low melting pointDissolves in water

    29. Which of the following pairs of elements form a covalent compound.Antara pasangan unsur yang berikut, manakah membentuk satu sebatian kovalen?A Potassium and chlorine

    Kalium dan klorinB Magnesium and fluorine

    Magnesium dan fluorinC Nitrogen and fluorine

    Nitrogen dan fluorinD Aluminium and oxygen

    Aluminium dan oksigen

    30. Which of the following shows the electron arrangement of the compoundmagnesium oxide?Antara yang berikut, manakah menunjukkan susunan elektron bagi sebatianmagnesium oksida?

    Z Z

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    A

    B

    C

    D

    31. Which of the following compounds have both ionic and covalent bonds?

    Antara sebatian yang berikut, manakah mempunyai kedua-dua ion dan ikatankovalen?

    AAmmonia gasGas ammonia

    BCarbonKarbon

    C Ammonium nitrateAmmonia nitrat

    D MercuryMerkuri

    32. ElementXfrom Group 1 reacts with element Yfrom Group 16 to form an ioniccompound. What is the molecular formula of the compound?

    Unsur X dan Kumpulan 1 bertindak balas dengan unsur Y dari Kumpulan 16untuk membentuk satu sebatian ion. Apakah formula molekul sebatian itu?

    AXYBX2Y

    CXY2DX3Y2

    33. Which of the following compound dissolves in organic solvent?Antara sebatian yang berikut, manakah larut dalam pelarut organik?

    A Aluminium oxideAluminium oksida

    BHydrogen bromideHidrogen bromida

    C Zinc chlorideZink klorida

    D Sodium carbonateNatrium karbonat

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    34.

    Table 3 Jadual3

    Table 3 shows the electron arrangements for elements P, Q and R. Which of thefollowing statements is not true?

    Jadual 3 menunjukkan susunan elektron bagi unsur P, Q dan R. Antara pernyataanyang berikut, manakah tidakbenar?

    A Element Pis metal.Unsur P ialah logam.B Elements Pand Rform a compound that can conduct electricity in molten state.

    Unsur P dan R membentuk satu sebatian yang boleh mengalir elektrik dalamkeadaan leburan.

    C Element Rexists as diatomic molecule.Unsur R wujud sebagai molekul dwiatom.

    D Elements Q and Rform a compound by ionic bonding.Unsur Q dan R membentuk satu sebatian dengan ikatan ion .

    35. Which of the following statements explain the low melting point of covalentcompound?

    Antara pernyataan yang berikut, manakah menjelaskan takat lebur sebatiankovalen yang rendah?

    A Metallic bond is weak.

    Ikatan logam yang lemah.B Covalent compound is insoluble in water.

    Sebatian kovalen tidak larut dalam air.C The intermolecular force is weak.Daya tarikan antara molekul adalah lemah.

    D Covalent bond is weak.

    Ikatan kovalen yang lemah.

    Element

    Unsur

    Electronarrangement

    Susunanelektron

    P 2.8.1

    Q 2.4

    R 2.8.7

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    36. Which of the following substances has the properties as shown above?Antara bahan yang berikut, manakah mempunyai sifat -sifat seperti yangditunjukkan di atas?A Ethanol

    EtanolB Potassium oxide

    Kalium oksida

    C Sodium chlorideNatrium kloridaD Magnesium carbonate

    Magnesium karbonat

    Diagram1 Rajah 137. Diagram 1 shows the electron arrangement in a molecule of element X. What is the

    position of element Xin the Periodic Table?

    Rajah 1 menunjukkan susunan elektron dalam satu molekul unsur X. Apakahkedudukan unsur X dalam Jadual Berkala?

    38. ElementXcombines with carbon to form a compound, CX 2. ElementXcombineswith calcium to form a compound, CaX. Which of the following shows the electron

    arrangement for a compound formed between sodium and element X?Unsur X bergabung dengan karbon untuk membentuk satu sebatian, CX2. Unsur Xbergabung dengan kalsium untuk membentuk satu sebatian, CaX. Antara yangberikut, manakah menunjukkan susunan elektron bagi sebatian yang terbentukantara natrium dan unsur X?

    Low melting and boiling points.Takat lebur dan takat didih yang rendah.

    state.Tidak mengalirkan elektrik dalam keadaanpepejal.

    Soluble in organic solvent.Larut dalam pelarut organik.

    PeriodKala

    GroupKumpulan

    A 2 14

    B 3 17

    C 3 18

    D 4 14

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    A

    B

    C

    D

    39. What is the number of moles of copper (II) sulphate in 80 g of copper (II) sulphate,

    CuSO in 80 g of copper (II) sulphate, CuSO 4?[ Relative atomic mass : O= 16, S=32,Cu=64]

    Berapakah bilangan mol kuprum (II) sulfat dalam 80 g kuprum (II) sulfat, CuSO4?

    A. 0.50 mole B 0.52 moleC 0.65 mole D 0.70 mole

    40. Element P and Q are placed in the same group in the periodic Table. If the protonnumber of P is 11, then the proton number of Q is probably?Unsur P dan Q diletakkan di kumpulan sama dalam jadual berkala unsur. ikanombor proton P ialah 11, maka nombor proton Q mungkinn ialah

    A 1 B 9C 19 D 21

    41 Element is located in the same group as Sodium in periodic table. is not theactual symbol of the element. Which of the following statement are chemical propertiesof element .Unsur terletak dalam kumpulan yang sama dengan natrium dalam jadual berkalaunsure. bukan symbol sebenar. Antara penyataan berikut, yang manakah sifat kimiabagi unsur .

    I React with water to produce an alkaline solution.Bertindak balas dengan air untuk menghasilkan larutan beralkali.

    II React with oxygen gas to produce a yellow solidBertindak balas dengan gas oksigen untuk menghasilkan pepejal kuning

    III React with chlorine to produce a white powder.Bertindak balas dengan klorin untuk menghasilkan serbuk putih

    IV React with potassium hydroxide to produce a neutral solution.Bertindak balas dengan kalium hidroksida untuk menghasilkan larutan neutral.

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    A I and III C II and IIIB I and IV D II and Iv

    42. Which statement explain why the si e of the atoms of group 1 element increasewhen going down the group in the periodic table.Pernyataan yang manakah menjelaskan sai atom atom unsur kumpulan 1 meningkatapabila menuruni kumpulan itu dalam jadual berkala.

    A. The number of proton increaseNombor proton meningkat

    B. The number of shell with electron increaseBilangan petala dengan electron meningkat

    C. The relative atomic mass increaseisim atom relative meningkat

    D. The number of valence electron increaseBilangan electron valens meningkat .

    43. Which substance is an ionic compound?

    Antara berikut, yang manakah ialah sebatian ion?

    A. Sodium sulphate C. NaphthaleneNatrium sulfat Naftalena

    B. Potassium nitrate D Magnesium chlorideKalium nitrate Magnesium klorida

    44. Element Preacts with bromine to form a solid with the formula PBr2. Which of thefollowing electron arrangements of element Pis true?Unsur P bertindak balas dengan bromin untuk membentuk satu pepeja l dengan

    formula PBr2. Antara susunan elektron bagi unsur P yang berikut, manakah benar?

    A 2.8 C 2.8.4B 2.8.1 D 2.8.8.2

    45. Which of the following compound dissolves in organic solvent?Antara sebatian yang berikut, manakah larut dalam pelarut organik ?A Aluminium oxide

    Aluminium oksidaBHydrogen bromide

    Hidrogen bromidaC Zinc chloride

    Zink kloridaD Sodium carbonate

    Natrium karbonat

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    Diagram 2 Rajah 246. Diagram 2 shows the set-up of the apparatus to determine the empirical formulaof a copper (II) oxide. Which of the following gas is suitable to be used in theDiagram 2?

    Rajah 2 menunjukkan susunan radas untuk menentukan formula empirik kuprum (II)oksida. Antara gas yang berikut, manakah sesuai diguna dalam Rajah 2?A Hydrogen gasGas hidrogen

    B Oxygen gasGas oksigen

    C Carbon dioxide gasGas karbon dioksida

    D Nitrogen gasGas nitrogen

    47.