PEPERIKSAAN IJAZAH SARJANA MUDA SAINS DENGAN PENDIDIKAN EXAMINATION FOR THE DEGREE OF BACHELOR OF SCIENCE WITH EDUCATION

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1 UNIVERSITI MALAYA UNIVERSITY OF MALAYA PEPERIKSAAN IJAZAH SARJANA MUDA SAINS DENGAN PENDIDIKAN EXAMINATION FOR THE DEGREE OF BACHELOR OF SCIENCE WITH EDUCATION SESI AKADEMIK 2009/2010 : SEMESTER 2 ACADEMIC SESSION 2009/2010 : SEMESTER 2 SCEP1252 : KIMIA ASAS I BASIC CHEMISTRY I April/Mei 2010 April/May 2010 MASA : 2 jam TIME : 2 hours ARAHAN KEPADA CALON : INSTRUCTIONS TO CANDIDATES : Kertas soalan ini mengandungi Bahagian A, B dan C. This paper consists of Section A, B and C. Jawab soalan mengikut arahan yang diberikan dalam setiap bahagian. Questions should be answered according to the instructions given in each section. (Kertas soalan ini mengandungi 9 soalan dalam 8 halaman yang dicetak) (This question paper consists of 9 questions on 8 printed pages)

2 SCEP1252/02 BAHAGIAN A (33 MARKAH) SECTION A (33 MARKS) Jawab semua soalan. Answer all questions. 1. (a) Namakan sebatian berikut: Name the following compounds: Cl CH 2 (A) (B) (C) CH 2 C (D) (E) Lukis formula struktur bagi sebatian berikut: Draw the structural formulas for the following compounds: (i) (ii) 1-Metil-3-bromo-bisiklo[4.3.0]-nonana 1-Methyl-3-bromo-bicyclo[4.3.0]-nonane (Z)-3-Chloro-2-butena (Z)-3-Chloro-2-butene (c) Nama IUPAC sebatian organik berikut tidak betul. Memperbaiki kesalahannya: The following IUPAC names for organic compounds are incorrect. Correct the mistake(s): (i) (ii) 3,6-Dimetil-fluorobenzene 3,6-Dimethyl-fluorobenzene cis-4-hexun-2-ena cis-4-hexyn-2-ene (10 markah / marks)

3 SCEP1252/03 2. Yang manakah di antara sebatian berikut merupakan sebatian aromatik dan yang manakah bukan sebatian aromatik? Which of the following compounds are aromatic and which are not? (A) (B) (C) O (D) (E) (5 markah / marks) 3. (a) Manakah daripada isomer seterusnya lebih reaktif dalam pembrominan radikal? Jelaskan dengan membandingkan perantaraan tindak balas. Which of the following isomers is more reactive in a radical bromination? Explain by comparing the reaction intermediates. (A) (B) Manakah daripada sebatian berikut (A atau B) adalah bahan pemula yang berpadanan untuk sintesis 3-bromo-nitrobenzene? Jelaskan dengan menggunakan mekanisme tindak balas. Which of the following compound (A or B) is a suitable starting material for the synthesis of 3-bromo-nitrobenzene? Explain by providing the reaction mechanism. Br Br NO 2 NO 2 (A) (B) (10 markah / marks)

4 SCEP1252/04 4. (A) Cl 2 [AlCl 3 ] Cl 2 h (B) (C) Br 2 HBr (D) (a) Berikan formula struktur untuk semua produk utama tindak balas A dan B. Provide the structural formulas for all major reaction product(s) of reactions A and B. Berikan dua (2) konformasi utama untuk produk tindak balas C dan tunjukkan yang mana mempunyai tenaga yang lebih lebih. Provide two (2) major conformations for reaction product C and indicate which of them is lower in energy. (c) Berikan formula struktur untuk produk tindak balas D. Provide the structural formula for reaction product D. (8 markah / marks)

5 SCEP1252/05 BAHAGIAN B (33 MARKAH) SECTION B (33 MARKS) Jawab semua soalan. Answer all questions. 5. (a) Apakah asas pembenaan Jadual Berkala moden? What is the basis for the construction of the periodic table? Lukiskan satu sketsa Jadual Berkala yang menunjukkan unsur-unsur kumpulan utama, logam-logam peralihan, lantanida dan aktanida. Draw a sketch of the Periodic Table that shows the main group elements, transition metals, the lanthanides and the actinides. (c) Apakah yang dimaksudkan dengan metaloid? Beri dua contoh. What is a metalloid? Give two examples. (4 markah/ marks) (d) Bagaimanakah ciri logam bertukar dari kiri ke kanan Jadual Berkala. How does the metallic character change from left to right of the periodic table? (e) Namakan unsur-unsur yang terdapat dalam kumpulan VA. Namakan unsur-unsur bukanlogam, metaloid dan logam Name the elements in group VA. Name the non-metal, metalloid and the metals. 6. (a) Berapa banyak air perlu ditambah kepada 100.0cm 3 HClO 4 bagi menghasilkan HClO 4? How much water must be added to cm 3 of 1.00M HClO 4 to produce 0.750M HClO 4? (4 markah/ marks) Berapa gram Ca(OH) 2 akan terbentuk jika 40.0 cm 3 CaCl M ditambah kepada larutan 80 cm 3 NaOH 0.120M? How many grams of Ca(OH) 2 will be formed if 40.0 cm 3 of M CaCl 2 are added to 80 cm 3 of 0.120M NaOH solution? [Ca = 40, O = 16, H = 1, Na = 23, Cl = 35.5]

6 SCEP1252/06 BAHAGIAN C (34 MARKAH) SECTION C (34 MARKS) Jawab semua soalan. Answer all questions. 7. (a) Berikan definasi untuk Hukum Pengabadian Jisim dan Hukum Perkadaran Tetap. State and define the Law of Conservation of Mass and the Law of Definite Proportions. CuCO 3 + H 2 SO 4 CuSO 4 + CO 2 + H 2 O (2 markah/ marks) Daripada tindak balas kimia di atas, 31.0 g CuCO 3 dan 19.6 g H 2 SO 4 bertindak balas untuk membentuk CuSO 4. Kirakan: For the chemical reaction above, 31.0 g of CuCO 3 and 19.6 g H 2 SO 4 reacted to form CuSO 4. Calculate: (i) (ii) (iii) Jisim CuSO 4 yang terbentuk. the mass of CuSO 4 formed. Bilangan molekul CO 2 yang terbebas. the number of molecules of CO 2 liberated. Baki jisim CuCO 3 selepas tindak balas. the remaining CuCO 3 after reaction completion. (Ar Cu: 64, C: 12, O: 16, H: 1, S: 32, N A = 6.02 x ). (4 markah/ marks) (c) Dalam suatu proses industri, gas nitrogen dipanaskan sehingga 500 K dalam suatu vessel dengan isipadu yang tetap. Sekiranya pada asalnya gas mempunyai tekanan 100 atm dan suhu 300 K, apakah tekanannya pada 500 K sekiranya ia bersifat seperti gas sempurna? Dan apakah suhu akhir untuk sampel gas yang sama sekiranya tekanannya dinaikkan ke 300 atm? In an industrial process, nitrogen is heated to 500 K in a vessel of constant volume. If it enters the vessel initially at a pressure of 100 atm and a temperature of 300 K, what pressure would it exert at the working temperature if it behaved as a perfect gas? And what would be the temperature if the same sample were exerting a pressure of 300 atm? (4 markah/ marks)

7 SCEP1252/07 8. (a) Apakah gelombang normal dan radiasi elektromagnetik (EM)? Apakah perbezaan antara gelombang normal dan radiasi EM? What is a normal wave and electromagnetic radiation (EM)? What is the difference between a normal wave and EM radiation? Merujuk kepada teori Max Planck atas Radiasi Jasad Hitam, apakah jasad hitam? Bincang radiasi jasad hitam berdasarkan gambarajah diberi. Referring to Max Planck s theory of Black Body Radiation, what is a blackbody? Discuss Black Body Radiation based on the given diagram. (c) Louis de Broglie mencadangkan bahawa elektron menunjukkan waveparticle duality seperti yang dipamerkan oleh foton. Apakah wave-particle duality? Tunjukkan dualiti dengan bantuan persamaan. Louis de Broglie first suggested that electrons displayed wave-particle duality similar to that exhibited by photons. What is wave-particle duality? Show the duality with the help of equations.

8 SCEP1252/08 9. (a) Jelaskan model atom Niels Bohr dan postulasi yang menyokongnya. Apakah perubahan tenaga yang terlibat apabila elektron dalam suatu atom hidrogen berubah dari tahap tenaga ketiga ke tahap tenaga dasar? Apakah jarak gelombang foton yang terbebas? Describe Niels Bohr s atomic model and the postulates that accompany this model. What is the energy change when the electron in a hydrogen atom transits from the third energy state to the ground energy state? What is the wavelength of the photon emitted? (h = 6.63 x Js, c = 3 x 10 8 ms -1, R H = 2.18 x J). (6 markah/ marks) Berikan konfigurasi elektron dan lukis gambarajah orbital tahap tenaga dasar untuk atom klorin (Cl, Z = 17). Give the electronic configuration and draw the ground-state orbital energy level diagram for the chlorine atom (Cl, Z = 17). (3 markah/ marks) ~~~~~0000~~~~~