Hello and Welcome to UTME CBT FREE Practice Test - Chemistry You are to attempt 40 Random Objectives Questions ONLY for 30 minutes. Supply Your Full Name in the text box below and begin immediately. Your time starts NOW! Full Name (Surname First): The colour of phenolphthalein in an alkaline medium is (a) yellow (b) colourless (c) pink (d) orangeABCD An organic compound has an empirical formula CH2O and vapour density of 45. What is its molecular formula? [C=12, H=1, 0=16] A. C3H7OH B. C2H5OH C. C3H5O3 D. C2H4O2ABCD The radioactive radiation used in studying the arrangement of particles in giant organic molecules is ______ A. γ -rays. B. α-particles. C. X-rays. D. β-particles.ABCD The common ore of iron is ______ (a) bauxite (b) galena (c) cassiterite (d) magnetiteABCD Calculate the quantity of electricity in coulombs required to liberate 10g of copper from copper compound. [Cu=64, F=96500 Cmol-1] A. 32395.5. B. 30156.3. C. 60784.5. D. 15196.5.ABCD Z in diagram above represents A. heat of reaction. B. activation energy. C. free energy. D. entropy of reaction.ABCD A piece of filter paper moistened with lead (Il) ethanoate solution turns black when the paper is dropped into a gas jar containing an unknown gas. The gas is likely to be _______ A. sulphur (IV) oxide B. hydrogen chloride C. sulphur(V) oxide D. hydrogen sulphide.ABCD In the reaction above, high pressure will favour the forward reaction because _______ A. high pressure favours gas formationB. the reaction s in dynamic equilibriumC. the reaction is exothermicD. the process occurs with a decrease in volume.ABCD Oxygen in air can he removed using (a) lime water (b) caustic soda solution (c) pyrogallol solution (d) slaked limeABCD The highest rate of production of carbon(IV) oxide can be achieved using _______ A. 0.05 moI dm-3 HCI and 5g powdered CaCO3B. 0.05 mol dm-3 HCl and 5g lump CaCO3C. 0.10 moI dm-3 HCl and 5g powdered CaCO3 .D. 0.025 mol dm-3 HCI and 5g powdered CaCO3.ABCD The preference in the usage of asbestos support to platinum block as a catalyst can be attributed to its _______ (a) increased surface area(b) high concentration(c) low concentration(d) decreased surface areaABCD Calculate the mass of magnesium that would be deposited by 8 faradays of electricity? [Mg = 24] (a) 96g (b) 48g (c) 72g (d) 120gABCD The bond-breaking energies in an endothermic reaction is usually (a) equal to the bond-forming energies(b) more than the bond-forming energies(c) less than the bond- forming energies(d) double the bond- forming energiesABCD In the extraction of sodium from fused sodium chloride, the anode is made of platinum because A. sodium is formed at the anode.B. chlorine is formed at the anode.C. sodium does not react with platinum.D. chlorine does not react with platinum.ABCD The general formula of haloalkanes where X represents the halide is A. CnH2n-1X. B. CnH2nX. C. CnH2n+2X. D. CnH2n+1X.ABCD Which of the following gases has a characteristic pungent smell, turns red litmus paper blue and forms dense white fumes with hydrogen chloride gas? A. N2 B.N2O C. Cl2 D. NH3ABCD A few drops of NaOH solution was added to an unknown salt forming a white precipitate which is insoluble in excess solution. The cation likely present is A. Zn2+. B. Pb2+. C. Ca2+. D. Al3+.ABCD 2-methyl propan -2- ol is an example of a ______ A. primary alkano B. secondary alkanol C. tertiary alkanol D. quaternary alkanol.ABCD How many cations will be produced from a solution of potassium aluminium tetraoxosulphate (VI)? A. 3 B. 4 C. 1 D. 2ABCD The mass of copper deposited when a current of 2.0 A is passed through a solution of a copper salt for 60 minutes is [Cu=64, F= 96500 C mol-1] (a) 4.78g (b) 0.04g (c) 2.39g (d) 9.55gABCD What type of bond exists between an element X with atomic number 12 and Y with atomicnumber 17? A. Electrovalent. B. Metallic. C. Covalent. D. Dative.ABCD A few drops of concentrated HNO3 is added to an unknown solution and boiled for a while. If thisproduces a brown solution; the cation present is likely to be _______ A. Pb2+ B. Cu2+ C. Fe3+ D. Fe2+ABCD50 cm3 of a gas was collected over water at 10oC and 765 mm Hg. Calculate the volume of the gas at s.t.p. if the saturated vapour pressure of water at10oC is 5mm Hg. A. 49.19 cm3 B. 48.87 cm3 C. 48.55 cm3 D. 48.23 cm3ABCD The monomer of natural rubber is _______ (a) 2methylbuta-1 ,3-diene (b) 1 -buten-3-yne (c) buta- 1,3 -diene (d) 2-chlorobuta-1,3-dieneABCD In the electrolytic extraction of calcium from calcium chloride, the cathode is _____ A. zinc. B. graphite. C. platinum. D. iron.ABCD The functional groups present in the compound above are A. alkene and halo-groupB. hydroxyl and chloro-groupC. alkene and chloro-groupD. hydroxyl and halo-group.ABCD The alkyne that will give a white precipitate silver trioxonitrate (V) is ______ A. CH3 CH2 C = C CH2 CH3B. CH3 C = C CH2 CH2 CH3C. CH3 CH2 CH2 CH2 C = CHD. CH3 CH2 CH2 C = C CH2 CH3.ABCD Which of the following questions is correct about the periodic table? A. The non-metallic properties of the elements tend to decrease across each period.B. The valence electrons of the elements increase progressively across the period.C. Elements in the same group have the same number of electron shells.D. Elements in the same period have the same number of valence electrons.ABCD A silicon - containing ore has 92% 28Si, 5% 29Si and 3% 30Si. Calculate the relative atomic mass of the silicon. A. 14.00. B. 29.00. C. 28.11. D. 28.00.ABCDThe number of isomers that can be obtained from C4H10 is _________A. 3 B. 4 . C. 1 D. 2.ABCD Which of the following compounds will burn with a brick-red colour in a non-luminous Bunsen flame? A. LiCI B. NaCl C. CaCI2 D. MgCl2ABCD 16.55g of lead (ll) trioxonitrate(V) was dissolved in 100 g of distilled water at 20°C, calculate the solubility of the solute in mol dm-3 [Pb = 207, N = 14, O = 16] A. 0.05 mol dm-3 B. 2.00 mol dm-3 C. 1.00 mol dm-3 D. 0.5 mol dm-3ABCD The dispersion of a liquid in a liquid medium will give ________ A. an emulsion. B. a fog. C. a gel. D. an aerosol.ABCD Calculate the molecular formula of a compound with empirical formula CH2O and relative molecular mass 120 [C = 12, O = 16, H = 1] (a) C2H4O2 (b) C4H8O4 (c) C8H16O8 (d) C3H6O3ABCD The IUPAC nomenclature of the compound above is ______ A. 2-bromo-3-chlorobutanol.B. 3-bromo-2-chlorobutanol.C. 3-chloro-2-bromobutanol.D. 2-chloro-3-bromobutanol.ABCD If the elements X and Y have atomic numbers 11 and 17 respectively, what type of bond can they form? A. Dative. B. Covalent. C. Ionic. D. Metallic.ABCD The electronic configuration of Mg2+ is ______ A. 1s2 2s2 2p6 3s2 3p2 B. 1s2 2s2 2p6 3s2 C. 1s2 2s2 2p6 D. 1s2 2s2 2p4ABCD In the illustration above, x and y respectively represent (a) hydration and fermentation(b) hydrolysis and condensation(c) condensation and hydrolysis(d) fermentation and hydrationABCD The presence of impurities in a solid will make the melting point to (a) decrease (b) increase (c) remain unchanged (d) be zeroABCD The separation technique that is based on the principle of solubility of a solid in two miscible liquids is ______ (a) fractional distillation (b) distillation (c) precipitation (d) filtrationABCD1 out of GREAT! You finished before the expiration of the 30 minutes allotted to you. You may want to preview before submission, else, Click the submit button below to see your score To submit your quiz and see your score/performance report; Make sure you supply your Full Name in the form above. Unable to submit your quiz? 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