Hello Welcome to the SS1 1st Term Evaluation Test – Chemistry – FREE Access (20 Questions ONLY) 1. You will attempt 20 objective questions for 15 minutes. If the time allocated (15 minutes) elapsed, assessment exercise will end and result will be displayed immediately on the screen. 2. You cannot change your answer after selection. Be sure before you select your answer. 3. Your score, questions attempted, selected answers and correct answers will be displayed on the screen after submission. A printable copy of your performance report will be emailed to your email address inbox immediately after submission. Make sure to input a working email address inside the text below. 4. You are strongly advised to work on your own. Fill the form below as they will appear on your result sheet and Click the Next Button to Begin Full Name: Name of School email address: 1. [ Separating Techniques ]Fractional crystallization is used to separate ______ A. two or more miscible liquids. B. two or more coloured substances. C. two or more immiscible liquids. D. two or more solid (solutes) which are present in the same solution in roughly equal amounts. A B C D2. [ Particulate Nature of Matter ]Which of these properties shows that a liquid is pure?A. It does not mix with waterB. It boils at a fixed temperature and at a given pressureC. It is colourless and odourlessD. It dissolves many solutes A B C D3. [ Valency, Formulae and Chemical Equation ]The valency (ies) of sulphur is (are) A. 2 or 3 B.1 or 2 C. 2, 4 or 6 D. 2 or 4 A B C D4. [ Particulate Nature of Matter ]One of these is not a physical change?A. The melting of candle waxB. Sublimation of Iodine crystalsC. The hardening of cement by the absorption of CO2D. The dissolution of common salt in water A B C D5. [ Separating Techniques ]A mixture of sodium chloride (table salt), ammonium chloride and barium tetraoxosulphate (VI) can best be separated by ____ A. addition of water followed by filtration, then sublimation. B. addition of water followed by sublimation, then filtration. C. sublimation followed by addition of water and then filtration. D. fractional distillation. A B C D6. [ Particulate Nature of Matter ]The change in colour of zinc oxide from white to yellow and vice-versa during heating and after cooling respectively is a _____A. physical changeB. chemical changeC. irreversible changeD. decomposition reaction A B C D7. [ Valency, Formulae and Chemical Equation ]The number of moles of acid reacting with copper in the reaction below is _____ Cu(s) + 4HNO3(aq) —-- Cu(NO3)2(aq) + 2H2O(l) + 2NO2(g) A. 0 B. 2 C. 1 D. 4 A B C D8. [ Separating Techniques ]Which of these is correct? A. Fractional crystallization can only be used as a method of separating solutes that have different solubilities at different temperatures, in the given solvent. B. Simple distillation is used to separate a mixture of two or more miscible liquids. C. A separating funnel can be used to separate two or more miscible liquids. D. Magnetisation can be used to separate copper turnings from table salt. A B C D9. [ Particulate Nature of Matter ]Fractional distillation is used to separate ____A. liquids with different boiling pointsB. an insoluble substance from a soluble volatile substance.C. gaseous mixtures onlyD. substance which differ in their solubilities in a solvent A B C D10. [ Valency, Formulae and Chemical Equation ]What are the elements in sodium hydrogen trioxocarbonate (IV)? A. Na, H, C B. Na, H, O C. Na, H, C, O D. Na, H, CO3 A B C D11. [ Valency, Formulae and Chemical Equation ]The modem symbols of elements were developed in ______ A. 1940 B. 1742 C. 1807 D. 1814 A B C D12. [ Valency, Formulae and Chemical Equation ]The formula for calcium trioxocarbonate (IV) is given as A. CO4 B. Ca(OH)2 C. CaO D. CaCO3 A B C D13. [ Separating Techniques ]Nitrogen can best be obtained from a mixture of oxygen and nitrogen by passing the mixture over ____A. heated phosphorusB. heated goldC. heated calciumD. heated copper turnings A B C D14. [ Separating Techniques ]One of these is not a chemical change.A. Heating water to produce steamB. Rusting of ironC. Addition of water to calcium carbideD. The dissolution of copper in concentrated trioxonitrate(v) acid. A B C D15. [ Valency, Formulae and Chemical Equation ]A compound has a chemical formula Fe3O4. What is the combining power of Fe in the compound? A. 3 B. 1 C. 2 D. 4 A B C D16. [ Valency, Formulae and Chemical Equation ]The formula for red lead is A. Pb3O4 B. PbO C. PbO2 D. Pb(OH)2 A B C D17. [ Valency, Formulae and Chemical Equation ]When the equation: Al(OH)3 + 3HNO3 — Al(NO3)3 + 3H2O is balanced, the coefficient of Al(NO3)3 is ____ A. 2 B. 3 C. 1 D. 0 A B C D18. [ Valency, Formulae and Chemical Equation ]The scientist who developed the symbols of the elements is by name _____ A. Isaac Newton B. Berzelius C. Arhennius D. Gibbs A B C D19. [ Valency, Formulae and Chemical Equation ]The valency of the hydroxonium ion is A. 2 B. 1 C. 3 D. 4 A B C D20. [ Particulate Nature of Matter ]If a mixture of two substance is to be separated by paper chromatography, it is important that _____A. they are both liquidsB. they are of different densitiesC. both are soluble in the same solventD. they have different boiling points A B C DHello , Good to know you finished before allocated time (10 Minutes) elapsed. You may wish to check on any missed questions using the previous button, otherwise, you may submit by clicking the submit button. 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