Question 1In which of the following is the oxidation number of nitrogen zero?A.NH3B.NaNO3C.HNO2D.N2E.NCl3Objective Show full explanation
Question 2Which of the following elements form more than one acidic oxideA.hydrogenB.sulphurC.carbonD.aluminiumE.ironObjective Show full explanation
Question 3When air is passed through a heated tube containing finely divided copper, the component that is absorbed in the process is A.Carbon(IV) oxideB.NitrogenC.Water vapourD.Noble gasesE.OxygenObjective Show full explanation
Question 4Which of the following compounds will undergo addition reactions?A.EthyneB.ButaneC.PentaneD.TetrachloromethaneE.EthanolObjective Show full explanation
Question 5Equilibrium is said to be attained in reversible reaction whenA.all the reactants have been used upB.all the products have been formedC.there is no further change in temperatureD.the rates of the forward and backward reactions are equalE.the rate of the products decreases with timeObjective Show full explanation
Question 6Catalytic hydrogenation of oils results in the production ofA.soapsB.detergentsC.alkanesD.butterE.margarineObjective Show full explanation
Question 7The heat accompanying in the reaction represented by the equation H2O(l) --> H2O(g) is described as the heat of A.solutionB.neutralizationC.vaporizationD.sublimationE.activationObjective Show full explanation
Question 8The following are uses of sulphur exceptA.manufacture of tetraoxosulphate (IV) acidB.prevention of the growth of fungiC.vulcanization of rubberD.manufacture of dyesE.coating of zinc to prevent rustObjective Show full explanation
Question 9How many molecules are there in 14g of nitrogen gas S.T.P.? [N = 14, Avogadro Number = 6.0 x 1023/mol]A.1.2 x 1023B.3.0 x 1023C.6.0 x 1023D.1.2 x 1024E.3.0 x 1024Objective Show full explanation
Question 10The metal extracted from cassiterite isA.calciumB.copperC.tinD.sodiumE.leadObjective Show full explanation
Question 11The most suitable method to use when separating an insoluble solid from a liquid isA.EvaporationB.FiltrationC.MagnetizationD.SublimationE.DistillationObjective Show full explanation
Question 12What is the amount (in mole) of sodium trioxocarbonate(IV) in 5.3g of the compound? [Na2CO3 = 106]A.0.05B.0.10C.0.20D.0.50E.2.00Objective Show full explanation
Question 13120cm3 of hydrogen were sparked with 60cm3 of oxygen at 110°C. What was the volume of steam produced? The equation for the reaction is 2H2(g) + O2(g) ---> 2H2O(g)A.30cm3B.60cm3C.90cm3D.120cm3E.180cm3Objective Show full explanation
Question 14The following are miscible with water except A.ethylethanoateB.methanolC.ethanoic acidD.ethanol Objective Show full explanation
Question 15The major raw material in a plastic industry is A.ethanolB.sulphurC.methylethanoateD.ethaneE.ethene Objective Show full explanation
Question 16Which of the following compounds is aromatic? A.benzeneB.cycbbutaneC.cyclopentaneD.hexaneE.ethane Objective Show full explanation
Question 17Given that 32.0g of sulphur contains 6.02 x 1023 atoms, how many atoms are there in 2.70g of aluminium?(AI=27, S=32) A.6.02 x 1023B.3.01 x 1023C.6.02 x 1022D.5.08 x 1022E.3.01 x 1022 Objective Show full explanation
Question 18An acid present in the proteins is A.lactic acidB.amino acidC.propanoic acidD.palmitic acidE.stearic acid Objective Show full explanation
Question 19A sample of orange juice is suspected to have been contaminated with a yellow dye. Which of the following methods can be used to detect the dye? A.decantationB.chromatographyC.distillationD.filtrationE.evaporation Objective Show full explanation
Question 20Which of the following hydrocarbons is not likely to be present in petrolA.C14H30B.C10H22C.C9H22D.C7H10E.C6H12Objective Show full explanation