JAMB CHEMISTRY PAST QUESTIONSAcadlly LearningJanuary 9, 2022JAMB/UTME Exam Past Questions & Answers 0% 3 JAMB CHEMISTRY PAST QUESTIONS JAMB CHEMISTRY PAST QUESTIONS Attempt all 60 questions picked from our pool past questions. You have 1 hour to answer all 60 questions. You can retake the exam again and again Goodluck 1 / 60 Category: JAMB CHEMISTRY PAST QUESTIONS The ionic radii of metals are usually unaffected by the charge on the ion the same as their atomic radii less than their atomic radii greater than their atomic radii 2 / 60 Category: JAMB CHEMISTRY PAST QUESTIONS The industrial preparation of hydrogen gas from water gas is referred to as Bosch process Haber process Bayer Process Contact process 3 / 60 Category: JAMB CHEMISTRY PAST QUESTIONS The number of electronic shells contained in an atom with electron configuration 1s22s22p63s23p64s2 is 3 2 5 4 4 / 60 Category: JAMB CHEMISTRY PAST QUESTIONS Calculate the amount in moles of silver deposited when 9650C of electricty is passed through a solution of silver salt [= 96500 Cmol-1] 10.00 0.05 0.10 10.80 5 / 60 Category: JAMB CHEMISTRY PAST QUESTIONS Which of the following statements is correct about the periodic table?Which of the following statements is correct about the periodic table? The valence electrons of the elements increase progressively across the period The non-metallic properties of the elements tend to decrease across each period Elements in the same group have the same number of electron shells Elements in the same period have the same number of valence electrons 6 / 60 Category: JAMB CHEMISTRY PAST QUESTIONS The situation obtained when a perfect gas expands into a vacuum is ΔH is positive and TΔ S is zero ΔH is positive and T Δ S is negative ΔH is zero and T Δ S is positive ΔH is negative and TΔ S is zero 7 / 60 Category: JAMB CHEMISTRY PAST QUESTIONS Hydrogen can be displaced from a lot alkaline solution by Sn Cu Cn Fe 8 / 60 Category: JAMB CHEMISTRY PAST QUESTIONS Ammonium chloride can be separated from its mixture with common salt by Sublimation Decantation Evaporation Distillation 9 / 60 Category: JAMB CHEMISTRY PAST QUESTIONS Which of these require crystallization most? Drug making Cement making Paint making Perfume making 10 / 60 Category: JAMB CHEMISTRY PAST QUESTIONS The principle of column chromatography is based on th ability of the constituents to React with the solvent in the column Dissolve in each other in the column Move at different speeds in the column React with each other in the solvent in the column 11 / 60 Category: JAMB CHEMISTRY PAST QUESTIONS Aluminium hydroxide is used in the dyeing industry as a dispersant mordant salt dye 12 / 60 Category: JAMB CHEMISTRY PAST QUESTIONS Which of the following represents the kind of bonding present in ammonium chloride? covalent only ionic and dative covalent ionic only dative covalent 13 / 60 Category: JAMB CHEMISTRY PAST QUESTIONS Which of the following statements is true about 2-methylpropane and butane They are members of same homologous series They have the same boiling points They have the same chemical properties They have different number of carbon atoms 14 / 60 Category: JAMB CHEMISTRY PAST QUESTIONS A mixture is different from a compound because a mixture can be represented by a chemical formula while a compound cannot a mixture is always homogeneous while a compound is not the constituent of a compound are chemically bound together while those of a mixture are not the properties of a compound are those of its individual constituents while those of a mixture differ from its constituents 15 / 60 Category: JAMB CHEMISTRY PAST QUESTIONS Which of the following statements does not show Rutherford's account of Nuclear Theory? An atom contains a region which contains protons and neutrons which is massive and can cause deflection of a few projectiles which is positively charged which is very large and in which close to 98% of projectiles pass undeflected 16 / 60 Category: JAMB CHEMISTRY PAST QUESTIONS Ethanol is soluble in water due to the presence of a Carbonyl group Methyl group Phenyl group Hydroxyl group 17 / 60 Category: JAMB CHEMISTRY PAST QUESTIONS Rare gases are suitable because they form ions easily are volatile gases are monoatomic have duplet or octet electronic configuration in the outermost shells in their atoms 18 / 60 Category: JAMB CHEMISTRY PAST QUESTIONS During the electrolysis of copper II sulphate between platinum electrodes, if litmus solution is added to the anode compartment the litmus turns blue and hydrogen is evolved the litmus turns blue but no gas is evolved the litmus turns red and oxygen is evolved the litmus turns blue and oxygen is evolved 19 / 60 Category: JAMB CHEMISTRY PAST QUESTIONS According to the Kinetic Theory an increase in temperature causes the kinetic energy of particles to increase be zero decrease remain constant 20 / 60 Category: JAMB CHEMISTRY PAST QUESTIONS Diamond cannot be used As dies for drawing wires As abrasives In making bicycle chains In cutting glass and metals 21 / 60 Category: JAMB CHEMISTRY PAST QUESTIONS Which of the following properties is not peculiar to matter? Kinetic energy of particles increases from solid to gas Random motion of particles increases from liquid to gas Orderliness of particles increases from gas to liquid Random motion of particles increases from gas to solid 22 / 60 Category: JAMB CHEMISTRY PAST QUESTIONS When ammonia and hydrogen ion bond together to form ammonium ion, the bond formed is called ionic bond covalent bond co-ordinate bond electrovalent bond 23 / 60 Category: JAMB CHEMISTRY PAST QUESTIONS If the molecular mass of tetraoxosulphate (VI) acid is 98, calculate its vapour density. 49 82 106 196 24 / 60 Category: JAMB CHEMISTRY PAST QUESTIONS Iron is often galvanized in order to Protect it against corrosion Make it more malleable Remove the impurities unit Render it passive 25 / 60 Category: JAMB CHEMISTRY PAST QUESTIONS The process that occurs when two equivalent forms of a compound are in equilibrium is Reforming Resonance Isomerism Isotopy 26 / 60 Category: JAMB CHEMISTRY PAST QUESTIONS The salt formed from a weak acid and a strong base hydrolyzes in water to form an alkaline solution an acidic solution a saturated solution a buffer solution 27 / 60 Category: JAMB CHEMISTRY PAST QUESTIONS The shape of ammonia molecules is trigonal planar square planar tetrahedral octahedral 28 / 60 Category: JAMB CHEMISTRY PAST QUESTIONS In electrovalency, the oxidation number of the participating metal is always decreasing increasing constant neutral 29 / 60 Category: JAMB CHEMISTRY PAST QUESTIONS A second alkanol can be oxidized to give an alkanoic acid alkanal alkyne alkanone 30 / 60 Category: JAMB CHEMISTRY PAST QUESTIONS A gas X diffuses twice as fast as gas Y. if the relative molecular mass of X is 32, calculate the relative molecular mass of Y. 64 16 8 128 31 / 60 Category: JAMB CHEMISTRY PAST QUESTIONS The mass of silver deposited when a current of 10A is passed through a solution of silver salt for 4830s is – (Ag = 108 F = 96500(mol-1) 27.0g 108.0g 54.0g 13.5g 32 / 60 Category: JAMB CHEMISTRY PAST QUESTIONS The ideal gas laws and equations are true for all gases at low pressure and high temperatures low temperatures and high pressures low pressures and lower temperatures high pressures and high temperatures 33 / 60 Category: JAMB CHEMISTRY PAST QUESTIONS Sieving is a technique used to separate mixtures containing solid particles of the same size small sizes large sizes different sizes 34 / 60 Category: JAMB CHEMISTRY PAST QUESTIONS An oxidation state of or in K2CrO7 7 5 4 6 35 / 60 Category: JAMB CHEMISTRY PAST QUESTIONS Which of the compounds is composed of Al, Si, O and H? Clay Urea Epson salt Limestone 36 / 60 Category: JAMB CHEMISTRY PAST QUESTIONS The elements that belong to the third period of periodic table are B, C, N, and O Li, Be, Al and D N2, Mg, S and Ar Na, P, O and Cl 37 / 60 Category: JAMB CHEMISTRY PAST QUESTIONS Which of the following statements is correct about the periodic table? The non-metallic Properties of the elements tend to decrease across each period Elements in the same period have the same number of valence electrons The valence electrons of the elements in the same period increase progressively across the period Elements in the same group have the same number of electron shells 38 / 60 Category: JAMB CHEMISTRY PAST QUESTIONS Tin is unaffected by air at ordinary temperature due to its Low melting point White lustrous appearance High boiling point Weak electropositive character 39 / 60 Category: JAMB CHEMISTRY PAST QUESTIONS Tartaric acid is used industrially to dry substance remove rust make baking powder make fruit juice 40 / 60 Category: JAMB CHEMISTRY PAST QUESTIONS A given mass of gas occupies 2dm3 at 300k. At what temperature will its volume be doubled, keeping the pressure constant? 400k 550k 480k 600k 41 / 60 Category: JAMB CHEMISTRY PAST QUESTIONS Cathode rays cause an object placed behind a perforated anode to cast a shadow on the screen. This observation shows that the rays are negatively charged are positively charged have mass travel in straight lines 42 / 60 Category: JAMB CHEMISTRY PAST QUESTIONS The constituent common to duralumin and alnico is Mg Al Mn Co 43 / 60 Category: JAMB CHEMISTRY PAST QUESTIONS The arrangement of particles in crystal lattices can be studied using γ-rays β-rays X-rays α-rays 44 / 60 Category: JAMB CHEMISTRY PAST QUESTIONS Vulcanization involve the removal of a polymer monometer the single bond the double bond 45 / 60 Category: JAMB CHEMISTRY PAST QUESTIONS The reaction of halogens in the presence of sunlight is an example of addition reaction substitution reaction hydrogenation reaction oxidation reaction 46 / 60 Category: JAMB CHEMISTRY PAST QUESTIONS Which process(es) is/are involved in the turning of starch iodide paper blue-black by chlorine gas? iodine attacks the starch to give the blue-black color chlorine oxidizes the iodide ion to produce iodine which attacks the starch to give the blue-black color chlorine attacks the iodide ion to give the blue-black color chlorine attacks the starch to give the blue-black color 47 / 60 Category: JAMB CHEMISTRY PAST QUESTIONS Calculate the percentage composition of oxygen in calcium trioxocarbonate(IV) [Ca=40, C=12, O=16] 40 12 48 16 48 / 60 Category: JAMB CHEMISTRY PAST QUESTIONS The derivative of benzene that can be used in making explosives is xylene aniline phenol toluene 49 / 60 Category: JAMB CHEMISTRY PAST QUESTIONS The periodic classification is an arrangement of the elements isotopic weights molecular weights atomic weights atomic numbers 50 / 60 Category: JAMB CHEMISTRY PAST QUESTIONS Which of the following is an example of a chemical change? separating a mixture by distillation rusting of iron melting of ice dissolution of salt in water 51 / 60 Category: JAMB CHEMISTRY PAST QUESTIONS Which of the following statements about catalyst is false? catalyst reduce the activation energy for a reaction catalyst do not appear in the balanced equation catalysts do not alter the mechanism of the reaction and never appear in the rate low biological catalysts are called enzymes 52 / 60 Category: JAMB CHEMISTRY PAST QUESTIONS An elements used in production of matches is sulphur nitrogen copper aluminum 53 / 60 Category: JAMB CHEMISTRY PAST QUESTIONS Which of the following metals burns with brick red Ca Pb Mg Na 54 / 60 Category: JAMB CHEMISTRY PAST QUESTIONS The above orbital diagram shown the electronic configuration of neon nitrogen calcium chlorine 55 / 60 Category: JAMB CHEMISTRY PAST QUESTIONS Which of the following metals cannot replace hydrogen from water or steam? Sodium Iron Calcium Magnesium 56 / 60 Category: JAMB CHEMISTRY PAST QUESTIONS A synthetic rubber is obtained from the polymerization of butandiene propylene neoprene isoprene 57 / 60 Category: JAMB CHEMISTRY PAST QUESTIONS Which of the following will give a precipitate with an aqueous solution of copper (I) chloride? But-1-yne But-2-yne But-2-ene But-1-ene 58 / 60 Category: JAMB CHEMISTRY PAST QUESTIONS In a neutralization reaction involving HCI and NaOH using litmus as indicator, the colour at the end point is Purple Blue Red Orange 59 / 60 Category: JAMB CHEMISTRY PAST QUESTIONS All these are electromagnetic waves except Photon White light X-ray Infrared 60 / 60 Category: JAMB CHEMISTRY PAST QUESTIONS Which of the following does not support the fact that air is a mixture? the constituents of air can be separated by physical by physical means it cannot be represented with a chemical formula none of the above the constituents of air are in a fixed proportion by mass Email Your score is LinkedIn Facebook VKontakte 0% Restart quiz Send feedback
