Electrical Engineering Orientation/Chemical Science Processes

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Important Notes & Instructions on Answering the questions

 * The multiple choice questions are meant to test overall knowledge and literacy on basic elementary Chemistry. Indepth Chemistry required for a particular Engineering field will be dealt with during undergraduate studies.


 * Only SI units are used in this questionaire


 * Select the most correct answer of the four possible answers to each question.
 * Attempt all questions before submitting to view your results.
 * Use of calculator allowed.


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{| cellspacing="0" cellpadding="0" style="margin:0em 0em 1em 0em; width:100%" Science Aptitude test2: Questionaire
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{ {| cellspacing="0" cellpadding="0" style="margin:0em 0em 1em 0em; width:100%" From above periodic table of elements, amongst other supplied detail of each element, is the Electronegativity strength indication. Which of the following statement correctly defines Electronegativity? + (A) A measure of the tendency of an atom to attract a bonding pair of electrons. - (B) A measure of the atomic Electrical potential. - (C) Electronegativity of an atom is related to it's mass. - (D) None of the above.
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{ {| cellspacing="0" cellpadding="0" style="margin:0em 0em 1em 0em; width:100%" According to the Period table in question 1, Fluorine (F) is the most Electronegative element at 4.0. this means that... - (A) Fluorine forms only polar bonds. + (B) The bonding pair of electrons will be closer to the fluorine atom in a chemical bonding involving other atoms except another Fluorine atom. - (C) Fluorine forms only Pure-covalent bonds. - (D) Fluorine only forms ionic bonds.
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{ {| cellspacing="0" cellpadding="0" style="margin:0em 0em 1em 0em; width:100%" Uranium is mainly used in nuclear power stations to produce electricity. Enriched 235U is preferred to 238U in nuclear reactors. Which of the following statements is true about 235U & 238U? - (A) 235U is more toxic than 238U. - (B) 235U is cheaper than 238U. - (C) 238U does not react in nuclear fission. + (D) 235U is an Isotope of 238U.
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{ {| cellspacing="0" cellpadding="0" style="margin:0em 0em 1em 0em; width:100%" As an industrial application,a Zinc (Zn) layer is used to cover Iron (Fe) Hulls of big ocean liners. Which of the following statements is true about this application? + (A) Zinc protects Iron from corrosion by Oxidation. - (B) Zinc decreases building cost as it is cheaper than Iron. - (C) Zinc decreases the total weight as it is lighter than Iron. - (D) None of the above.
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{ {| cellspacing="0" cellpadding="0" style="margin:0em 0em 1em 0em; width:100%" The following diagram shows a standard Zinc/Iron Electrochemical Cell. Which electrode is a cathode in the above diagram? - (A) Zinc (Zn) electrode. + (B) Iron (Fe) electrode. - (C) both. - (D) none of the above.
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{ {| cellspacing="0" cellpadding="0" style="margin:0em 0em 1em 0em; width:100%" Consider the following reaction of Hydrogen gas with Iodine gas to form Hydrogen Iodide gas, being at equilibrium. The pressure is then increased at time t in the container at a constant temperature of 400°C? Which of the following graphs represent the change in concentration of the three gases as a result of compression? - (A) - (B) - (C) + (D)
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{ {| cellspacing="0" cellpadding="0" style="margin:0em 0em 1em 0em; width:100%" The melting point of two solids X and Y are 940°C and 925°C respectively. At temperature of 900°C, X conducts electricity but Y doesn't. At 950°C both conduct electricity. X & Y could be... + (A) X: Metallic Solid    ; Y: Ionic Solid - (B) X: Mollecular Solid  ; Y: Metallic Solid - (C) X: Ionic Solid       ; Y: Mollecular Solid - (D) X: Mollecular Solid  ; Y: Ionic Solid
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{ {| cellspacing="0" cellpadding="0" style="margin:0em 0em 1em 0em; width:100%" The complete combustion of an alkane can be represented as follows: alkane + O2 $$\to $$ X + Y The products X and Y are ... - (A) X: Carbon        ; Y: Water. + (B) X: Carbon dioxide ; Y: Water. - (C) X: alkene        ; Y: Carbon dioxide. - (D) X: alkyne        ; Y: Water.
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{ {| cellspacing="0" cellpadding="0" style="margin:0em 0em 1em 0em; width:100%" The volume of a certain mass of gas is 150dm3. The pressure of the gas is then halved at constant temperature. The volume of the gas will now be ... - (A) 75dm3. - (B) 150dm3. + (C) 300dm3. - (D) 600dm3.
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