Please, fill out the information below to continue. NAME EMAIL PHONE NUMBER 1. Sulphur burns in air to form? Basic Oxide Amphoteric Oxide Neutral oxide Acidic oxide2. What is detergent? A liquid surfactant A liquid soluble A liquid solution A liquid sovent3. Which of the following gives a yellow precipitate of a metallic derivative when reacted with ammoniacal silver trioxonitrate(v) at room temperature? ethanal propyne ethanol butene propane4. Which of the listed molecules has two lone pairs of electrons? carbon(iv)oxide ammonia hydrogen gas benzene water5. In which form is natural petroleum found? Gasoline Kerosene Tar Crude Oil6. As a vegetable preservative poly______ foam is used Uriathenes Urathanes Urethanes Uthane7. An atom is electrically neutral if the number of Protons is equal to the number of neutrons Neutrons is equal to the atomic number Protons is equal to the number of electrons Electrons is equal to the number of neutrons8. An element Y has the electronic configuration1s2 2s2 2p6 3s2 3p4 What is the symbol of element Y in the periodic table? S Si P Ar9. The catalyst generally used in the synthesis of methanol from carbon(ii)oxide and hydrogen is copper-zinc oxide zinc oxide vanadium(v)oxide nickel platinum10. Substances which absorb water from the atmosphere without dissolving in them are said to be Anhydrous Hygroscopic Hydrated Deliquesence11. The following oxides reacts with both acids and bases to form salts except tin (iv) oxide Lead (ii) oxide carbon (iv) oxide Zinc oxide12. The gas given off when calcium is added to water is Nitrogen(iv)oxide Oxygen Calcium oxide Hydrogen13. A finely divided form of a metal burns more readily in air than the rod form because the rod has Protecting oxide coating Higher molar mass Different chemical properties Smaller surface area14. Hydrogen can be found in these substances except? Limestone Alkalis Acids Natural Gas15. Potassium Methanoate is a salt of a weak acid and a strong base. When it is added to water, it hydrolyses to give a solution which turns red litmus blue neutralizes itself hydrolyses to give a solution which turns blue litmus red dissolves to give a neutral solution does not dissolve16. N2(g) + 3H2(g) ↔ 2NH3(g); ∆H = -90kj/molIn the equation above, the yield of ammonia can be decreased by Increasing the temperature Increasing the pressure Adding a catalyst Removing the ammonia as it is formed17. Which of the following decreases when a given mass of gas is compressed to half its initial volume? Atomic radius of each particle Frequency of collisions Average intermolecular distance Number of molecules present18. Solid NH4Cl and KCl are mixed together. How could they be separated easily? Precipitation by the addition of AgNO3 solution to the mixture dissolved in water Dissolution of the mixture in water followed by filtration Decantation of an aqueous solution of the mixture Sublimation Extraction19. The main constituents of petroleum are alkanes hydrocarbons solids alkynes gases20. Which of the following is NOT a halogen? bromine silicon fluorine iodine astatine21. When hydrogen sulphide gas is passed through an acidified solution of potassium heptaoxo dichromate(vi), the orange colour changes to green. This is because the sulphide ion changes to sulphur atom +6 state of Cr is reduced to +3 state chromium(vi) ion is oxidized hydrogen sulphide is a good oxidizing agent +3 state of Cr is oxidized to +6 state22. N2O4(g) ↔ 2NO2(g)In the endothermic reaction above, more product formation will be favoured by An increase in pressure Decreasing the temperature Increase in volume A decrease in volume23. What property of hydrogen makes it suitable for filling balloons? Its flammability Its solubility Its tensile strength Its low density24. Which of the following statements is NOT correct about the compound represented below?COOH|COOH it produces effervescence with saturated NaHCO3 solution its b.p is higher than that of the corresponding alkane its name is ethanedioic acid it is a di-carboxylic acid it has a basicity of 425. The following salts can be prepared by a double decomposition reaction EXCEPT BaSO4 PbCl2 KCl AgCl BaCO326. H2(g) + I2(g) ↔ 2HI(g) In the reaction, increasing the pressure will decrease the concentration of HI favour the forward reaction favour the backward reaction increase the concentration of HI have no effect on the equilibrium position27. Which of the following substances decompose when an electric circuit is passed through it? zinc rod tetra chloromethane dilute hydrochloric acid glucose solution28. What volume of distilled water would be added to 30cm³ of 18mol/dm³ HCl in order to dilute it 20 times? [ H=1, Cl=35.5, M.V=22400cm³] 27cm³ 360cm³ 600cm³ 542cm³ 12cm³29. P, Q, R, S are metals in the same period in the periodic table but in groups 3, 4, 5, 6 respectively. Which of them loses electrons least reactively? P S Q R30. Metallic elements that give coloured salts in aqueous solutions are called........... metals d-block s-block f-block alkaline-earth alkali31. Which of the following substances decompose when an electric circuit is passed through it? glucose solution tetra chloromethane zinc rod dilute hydrochloric acid32. When an atom gains an electron, it becomes Positively charged A non-metal atom A cation An anion Chemically inactive33. What current in amperes will deposit 2.7g of aluminium in 2 hours?[Al = 27, 1F = 96500C] 4 16 8 32 2834. Substance Q reacts with cold water to form a solution which turns red litmus blue.Substance Q could be? Phosphorus Nitrogen Sulphur Calcium35. Chemistry is a branch of science which can be used for providing the services to mankind. Comment on the statement. True False May Be Strongly not36. Where are Bio-chemical compounds used? Cooking Oils Skin Treatments All of the above Food preservatives37. Which of the following alloys contain Tin and Lead? steel coinage metal solder bronze brass38. When ammonium chloride is dissolved in water in a test tube, the test tube feels cooler showing that? Sublimation has occurred The solution is unsaturated The process is endothermic Ammonia gas is evolved39. Which of the following is not a separation technique? crystallization hydration filtration evaporation distillation40. Trioxonitrate (v) acid is not used for preparing hydrogen gas from metals because it Renders the metal passive is volatile is strongly oxidising forms a layer of oxide on the metal41. Which is not used as an alkali? Carbon hydroxide Potassium hydroxide Sodium hydroxide Nitrogen hydroxide42. The Azimuthal quantum number which corresponds to the f-orbital is 3 1 6 0 243. The isotope of hydrogen with relative atomic mass of 2 is? Hydride Tritium Deuterium Protium44. The loss of molecules of water of crystallization to the atmosphere by some crystalline salt is known as Efflorescence Effervescence Deliquescence Hygroscopy45. Which of the following pairs of compounds will undergo addition reaction? benzene and methane ethanol and propanone ethane and ethyne ethyne and ethylethanoate butyne and ethene46. The electrolyte used in lead accumulator cell is Ammonium chloride paste Ammonium chloride solution Tetraoxosulphate(vi) acid solution Manganese(iv)oxide47. The formula of the fourth member of the carboxylic family is C4H9COOH C3H7COOH C3H6COOH C4H7COOH C3H5COOH48. The following salts can be prepared by a double decomposition reaction EXCEPT PbCl2 KCl BaCO3 AgCl BaSO449. From the equation:Mg(s) + HCl(aq) → MgCl2(aq) + H2(g)What mass of hydrogen would be produced if 12.0g of magnesium reacted completely with dilute hydrochloric acid.{H=1; Mg=24; Cl=35.5} 2.0g 1.0g 24.0g 12.0g 4.0g50. Which of the following does NOT have the electronic structure of Argon? calcium ion sulphide ion potassium ion aluminium ion chloride ion51. The following metals are usually extracted by the method of electrolysis EXCEPT sodium magnesium potassium aluminium iron52. An element Y has the electronic configuration1s2 2s2 2p6 3s2 3p4 How many lone pair of electrons are present in element Y? 2 4 1 353. Radioisotopes can be used:I. As radioactive tracersII. for sterilizationIII. in photographyIV. for dyeing I, II, III and IV I and II Only I, II and III Only IV Only III and IV Only54. In the reaction, E + F ↔ G + H, the backward reaction is favoured if the concentration of F is increased E is increased E is reduced G is reduced55. In galvanizing iron, the metal which coats the iron is gold tin zinc silver aluminium56. The following metals are usually extracted by the method of electrolysis EXCEPT iron aluminium magnesium sodium potassium57. What volume of propane is left unreacted when 20cm³ of oxygen reacts with 20cm³ of propane? 16cm³ 1cm³ 5cm³ 40cm³ 20cm³58. Which of the following alloys contain Tin and Lead? bronze coinage metal steel brass solder59. Natural rubber is a ________ which is having high elasticity. Elastomer Chemical using carbon as main compound Material Substance60. Consider the reaction represented by the equation:H2(g) + I2(g) ↔ 2HI(g)    ΔH = -veWhich of the following statements about the equation is correct? increase in temperature will favour the forward reaction the removal of HI(g) formed will favour the backward reaction increase in pressure will favour the forward reaction the addition of a catalyst will change the equilibrium position pressure will have no effect on the production of HI(g)61 out of 60Time is Up!
