UNIVERSITI MALAYA UNIVERSITY OF MALAYA PEPERIKSAAN IJAZAH SARJANA MUDA SAINS EXAMINATION FOR THE DEGREE OF BACHELOR OF SCIENCE PEPERIKSAAN IJAZAH SARJANA MUDA SAINS DENGAN PENDIDIKAN EXAMINATION FOR THE DEGREE OF BACHELOR OF SCIENCE WITH EDUCATION SESI AKADEMIK 2016/2017 : SEMESTER 1 ACADEMIC SESSION 2016/2017 : SEMESTER 1 SIC1002 : KIMIA TAKORGANIK I INORGANIC CHEMISTRY I Dis 2016/Jan 2017 Masa: 3 jam Dec 2016/Jan 2017 Time: 3 hours ARAHAN KEPADA CALON INSTRUCTIONS TO CANDIDATES : Kertas soalan ini mengandungi tiga bahagian, Bahagian A, B dan C. This paper contains three sections, 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 10 soalan dalam 5 halaman yang dicetak) (This question paper consists of 10 questions on 5 printed pages)
BAHAGIAN A (45 MARKAH) SECTION A (45 MARKS) 1. Lukiskan struktur Lewis bagi sebatian yang berikut: Draw Lewis structures of the following compounds: (a) MgC 2 O 4 (C 2 H 5 ) 2 NH 2 Br (c) HCOOLi (d) CsNO 3 2. Daripada sebatian F 2 2+ dan F 2 4- : From F 2 2+ and F 2 4- compounds: (a) (c) Isikan elektron valens dari orbital molekul yang diberi Fill up the valence electrons in the provided molecular orbital Ramal dan jelaskan ciri kemagnetan Predict magnetism and explain why? Kirakan tertib ikatan (tunjukkan cara kerja) Calculate its bond order (show your work) (25 markah/marks) 2/5
3. Jelaskan perbezaan orbital molekul vs. teori jalur. Explain the differences between molecular orbital vs. band theory. BAHAGIAN B (30 MARKAH) SECTION B (30 MARKS) 4. Lukiskan satah berikut untuk satu kubik sistem: (-30-4); (204) Draw the following planes for a cubic system: (-30-4); (204) 5. Kebanyakan logam tersusun sebagai sebuah sel unit kubik. Nb memiliki ketumpatan 8.57 g/cm 3 dan panjang sisi sel unit 3.30 Å. Most metals are packed in a cubic unit cell. Nb has a density of 8.57 g/cm 3 and a unit cell length of 3.30 Å. (a) (c) (d) Berapakah jumlah atom Nb dalam 1 cm 3? (Berat atom = 92.90 g/mol How many Nb atoms are there in 1 cm 3? (Atomic weight = 92.90 g/mol) Berapakah sel unit dalam 1 cm 3? (1 Å = 10-8 cm) How many unit cells are there in 1 cm 3? (1 Å = 10-8 cm) Berapakah atom Nb dalam 1 sel unit? How many Nb atoms are there per unit cell? Namakan jenis sel unit kubik tersebut? Name the type of cubic unit cell? 6. Apakah perbezaan dan persamaan struktur CsCl dengan CsI? What are the differences and similarities between the structures of CsCl and CsI? 3/5
7. Jelaskan pemerhatian berikut: kereaktifan unsur kumpulan I meningkat apabila menuruni kumpulan. Explain the following trend: as we go down the group in group I element, the reactivity increases. 8. Jelaskan perbezaan kation daripada blok p yang memiliki electron tak berpasangan aktif secara stereokimia vs. tak aktif? Explain the differences between stereochemically active vs. inactive lone pair in p-block cations? BAHAGIAN C (25 MARKAH) SECTION C (25 MARKS) 9. (a) Apakah asid-okso? Berikan satu contoh. What is an oxoacid? Give one example. (2 markah/marks) Senaraikan dua faktor yang menentukan keasidan ikatan H-X (X = halida) dan terangkan kenapa keasidan menurun dalam urutan berikut: HI> HBr > HCl > HF. Terangkan kenapa HClO 4 merupakan asid Brønsted yang lebih kuat berbanding HBrO 4 List two factors that determine the acidity of H-X bond (X=halide) and explain why the acidity decreases in the following order: HI> HBr > HCl > HF. Explain why HClO 4 is a stronger Brønsted acid than HBrO 4 (6 markah/marks) 10. (a) Kirakan nilai E untuk penurunan Fe 3+ (ak) kepada logam besi. Tentukan G (298K) bagi setiap langkah. Calculate the value of E for the reduction of Fe 3+ (aq) to iron metal. Determine G (298K) for each step. 4/5
Fe 3+ (aq) Fe 2+ (aq) Fe(s) +0.77V -0.44V Menggunakan kaedah tindakbalas separa, lengkapkan dan seimbangkan tindakbalas berikut: Using the method of half reactions, complete and balance the following equation: MnO 4 - (aq) + CN - (aq) CNO - ( aq) + MnO 2 (s) (12 markah/marks) TAMAT END 5/5