Sch2107:Inorganic Chemistry I Question Paper
Sch2107:Inorganic Chemistry I
Course:Bachelor Of Science In Public Health
Institution: Meru University Of Science And Technology question papers
Exam Year:2013
QUESTION ONE (30 MARKS)
a) Write the following configuration of the elements with the following atomic numbers. In each case indicate whether the element is diamagnetic or paramagnetic. i. 32 ii. 29 iii. 15 iv. 6 (8 Marks) b) i) Distinguish between intermolecular and intramolecular forces. (3 Marks) ii) Briefly describe three main types of intermolecular forces. (6 Marks) c) An element analysis of organic compound gave 40.0% C, 6.70% H and 53.3% O. Determine its empirical formula. If the molar mass of the compound is 90g/ml. what is its molecular formula. (C=12.011G, H=1.008g, O=16g). (5 Marks) d) Determine the frequencies of electromagnetic radiation of the following wavelengths. Given the speed of light = 2.998 × 108??/??. i. 6.5???? ii. 438???? (4 Marks) e) Write down the formulaes of the following ions. i. Cyanide ii. Sulphite iii. Dichromate iv. Peroxide (4 Marks)
QUESTION TWO (20 MARKS)
a) Define Pauli’s exclusion principle. (2 Marks)
2
b) Briefly describe the significance of the four quantum numbers. (8 Marks) c) The configuration of an element is given below ???? 3??34??2
i. What is the atomic number of the element? ii. In what group and period is the element found? iii. Is the element diamagnetic or paramagnetic? iv. What is the configuration of the 2+ ion formed from this element? Is the ion diamagnetic or paramagnetic? (10 Marks)
QUESTION THREE (20 MARKS)
a) Draw the shapes of the following orbitals i. 3?? ?? ii. 4????2 iii. 3????2-??2 (6 Marks) b) Describe giving reasons the periodic trends of the following properties; i. Ionization energy ii. Atomic radii iii. Electron affinity (6 Marks) c) Write down the permissible sets of quantum numbers for the following; i. 4 electrons in a 2P orbital ii. 6 electrons in a 3d orbital (8 Marks)
QUESTION FOUR (20 MARKS)
a) Draw a Bohr-haber cycle and calculate the enthalpy change of the following reaction ????(??) + 1 2 ????(??) ? ????????(??) ??? ?????????????????????? ???? = -107??????????-1 ??? ?????????????????????? ???? = +97??????????-1 ??? ?????????? ???????????????????? ???????????? ???? = +496??????????-1 ??? ?????????? ???????????????? ???????????????? ???? = -325??????????-1 ??? ?????????????? ???????????? ???????? = -742??????????-1 (10 Marks)
b) Generally almost all substances have a greater density in their solid state than in their liquid state. However, water has its maximum density at 4°??. Give an explanation for this. (5 Marks) c) List down four processes through which a radioactive nuclide is converted to another nuclide. (4 Marks) d) Define nuclear fission. (1 Mark)
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