JAMB CHEMISTRY PAST QUESTIONSby AcadllyJAMB 0% 87 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 QUESTIONSThe elements in the periodic table are listed in order of increasing relative atomic number relative isotopic mass atomic mass nuclear charge 2 / 60 Category: JAMB CHEMISTRY PAST QUESTIONSWhich process(es) is/are involved in the turning of starch iodide paper blue-black by chlorine gas? chlorine attacks the iodide ion to give the blue-black color chlorine oxidizes the iodide ion to produce iodine which attacks the starch to give the blue-black color iodine attacks the starch to give the blue-black color chlorine attacks the starch to give the blue-black color 3 / 60 Category: JAMB CHEMISTRY PAST QUESTIONSA given mass of gas occupies 2dm3 at 300k. At what temperature will its volume be doubled, keeping the pressure constant? 480k 550k 600k 400k 4 / 60 Category: JAMB CHEMISTRY PAST QUESTIONSCast iron is used in making Chains and agricultural implements Nails and iron rods Iron sheets and retort stand Stoves and cookers 5 / 60 Category: JAMB CHEMISTRY PAST QUESTIONSWhich of these require crystallization most? Paint making Drug making Perfume making Cement making 6 / 60 Category: JAMB CHEMISTRY PAST QUESTIONSWhich of the following statements is correct about the periodic table?Which of the following statements is correct about the periodic table? Elements in the same group have the same number of electron shells Elements in the same period have the same number of valence electrons The non-metallic properties of the elements tend to decrease across each period The valence electrons of the elements increase progressively across the period 7 / 60 Category: JAMB CHEMISTRY PAST QUESTIONS2-methylprop-1-ene is an isomer of pent-2-ene but-2-ene 2-methyl but-1-ene 3-methyl but-1-ene 8 / 60 Category: JAMB CHEMISTRY PAST QUESTIONSWhich of the activities is commonly used as a nuclear fuel thorium palladium actium uranium 9 / 60 Category: JAMB CHEMISTRY PAST QUESTIONSIn the discovery of protein, the instrument used is glass tube and discharge tube cathode ray tube discharge tube with central cathode discharge tube with terminal cathode 10 / 60 Category: JAMB CHEMISTRY PAST QUESTIONSDiamond cannot be used In cutting glass and metals In making bicycle chains As dies for drawing wires As abrasives 11 / 60 Category: JAMB CHEMISTRY PAST QUESTIONSBurning magnesium ribbon in air removes which of the following(i) oxygen (ii) nitrogen (iii) argon and (iv) carbon(iv)oxide? i and ii only i only i, ii, iii and iv only i and iv only 12 / 60 Category: JAMB CHEMISTRY PAST QUESTIONSThe reaction of halogens in the presence of sunlight is an example of hydrogenation reaction addition reaction substitution reaction oxidation reaction 13 / 60 Category: JAMB CHEMISTRY PAST QUESTIONSWhen salt loses its water of crystallization to the atmosphere on exposure, the process is said to be effervescence déliquescence efflorescence fluorescence 14 / 60 Category: JAMB CHEMISTRY PAST QUESTIONSThe principle of column chromatography is based on th ability of the constituents to Dissolve in each other in the column Move at different speeds in the column React with each other in the solvent in the column React with the solvent in the column 15 / 60 Category: JAMB CHEMISTRY PAST QUESTIONSThe shape of ammonia molecules is trigonal planar tetrahedral octahedral square planar 16 / 60 Category: JAMB CHEMISTRY PAST QUESTIONSVulcanization involve the removal of monometer the single bond the double bond a polymer 17 / 60 Category: JAMB CHEMISTRY PAST QUESTIONSWhich of the following will give a precipitate with an aqueous solution of copper (I) chloride? But-1-ene But-1-yne But-2-yne But-2-ene 18 / 60 Category: JAMB CHEMISTRY PAST QUESTIONSWhich of the following does not support the fact that air is a mixture? none of the above the constituents of air can be separated by physical by physical means the constituents of air are in a fixed proportion by mass it cannot be represented with a chemical formula 19 / 60 Category: JAMB CHEMISTRY PAST QUESTIONSThe arrangement of particles in crystal lattices can be studied using γ-rays β-rays α-rays X-rays 20 / 60 Category: JAMB CHEMISTRY PAST QUESTIONSIron is often galvanized in order to Render it passive Protect it against corrosion Remove the impurities unit Make it more malleable 21 / 60 Category: JAMB CHEMISTRY PAST QUESTIONSCalculate the amount in moles of silver deposited when 9650C of electricty is passed through a solution of silver salt [= 96500 Cmol-1] 0.10 10.00 10.80 0.05 22 / 60 Category: JAMB CHEMISTRY PAST QUESTIONSAn elements used in production of matches is sulphur aluminum copper nitrogen 23 / 60 Category: JAMB CHEMISTRY PAST QUESTIONSWhich of the following types of alkanols undergo oxidation to produce alkanoic acids.I. Primary alkanolsII. Secondary alkanolsIII. Tertiary alkanols III only I and II only I only I, II and III 24 / 60 Category: JAMB CHEMISTRY PAST QUESTIONSWhich of the following represents the kind of bonding present in ammonium chloride? ionic only ionic and dative covalent dative covalent covalent only 25 / 60 Category: JAMB CHEMISTRY PAST QUESTIONSDuring 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 26 / 60 Category: JAMB CHEMISTRY PAST QUESTIONS200 cm3 of a gas at 25oC exerts a pressure of 700 mmHg. Calculate its pressure if its volume increase 350 cm3 at 75oC. 1430.54 mmHg 400.00 mmHg 342.53 mmHg 467.11 mmHg 27 / 60 Category: JAMB CHEMISTRY PAST QUESTIONSWhich of the following is an example of a chemical change? rusting of iron melting of ice separating a mixture by distillation dissolution of salt in water 28 / 60 Category: JAMB CHEMISTRY PAST QUESTIONSWhich of the following metals burns with brick red Ca Pb Na Mg 29 / 60 Category: JAMB CHEMISTRY PAST QUESTIONSThe filter in the cigarette reduce the nicotine construct by burning evaporation absorption absorption 30 / 60 Category: JAMB CHEMISTRY PAST QUESTIONSWhen large hydrocarbon molecules are heated at high temperature in the presence of a catalyst to give smaller molecules, the process is known as cracking degradation disintegration polymerization 31 / 60 Category: JAMB CHEMISTRY PAST QUESTIONSWhich of the following properties is not peculiar to matter? Random motion of particles increases from gas to solid Random motion of particles increases from liquid to gas Kinetic energy of particles increases from solid to gas Orderliness of particles increases from gas to liquid 32 / 60 Category: JAMB CHEMISTRY PAST QUESTIONSThe number of electronic shells contained in an atom with electron configuration 1s22s22p63s23p64s2 is 2 4 5 3 33 / 60 Category: JAMB CHEMISTRY PAST QUESTIONSWhat technique is suitable for separating a binary solution of potassium chloride and potassium trioxochlorate (V)? Evaporation Fractional distillation Filtration Fractional crystallization 34 / 60 Category: JAMB CHEMISTRY PAST QUESTIONSRare gases are suitable because they have duplet or octet electronic configuration in the outermost shells in their atoms are volatile gases form ions easily are monoatomic 35 / 60 Category: JAMB CHEMISTRY PAST QUESTIONSEthanol is soluble in water due to the presence of a Carbonyl group Phenyl group Methyl group Hydroxyl group 36 / 60 Category: JAMB CHEMISTRY PAST QUESTIONSHydrogen can be displaced from a lot alkaline solution by Cn Fe Cu Sn 37 / 60 Category: JAMB CHEMISTRY PAST QUESTIONSTin is unaffected by air at ordinary temperature due to its White lustrous appearance Weak electropositive character High boiling point Low melting point 38 / 60 Category: JAMB CHEMISTRY PAST QUESTIONSTo what temperature must a gas at 273k be heated in order to double both its volume and pressure? 1092K 298K 819K 546K 39 / 60 Category: JAMB CHEMISTRY PAST QUESTIONSA second alkanol can be oxidized to give an alkanal alkanoic acid alkyne alkanone 40 / 60 Category: JAMB CHEMISTRY PAST QUESTIONSWhich of the noble gases has the greatest ionization energy Rr Xe Ar He 41 / 60 Category: JAMB CHEMISTRY PAST QUESTIONSThe energy value of petrol can be determined by Thermometer Bomb calorimeter Fractionating column Catalytic cracker 42 / 60 Category: JAMB CHEMISTRY PAST QUESTIONSThe Sulphide which is insoluble in dilute hydrochloric acid is Na2S FeS CuS ZnS 43 / 60 Category: JAMB CHEMISTRY PAST QUESTIONSA liquid that will dissolve fat is water kerosene calcium hydrochloride hydrochloric acid 44 / 60 Category: JAMB CHEMISTRY PAST QUESTIONSCathode rays cause an object placed behind a perforated anode to cast a shadow on the screen. This observation shows that the rays travel in straight lines are positively charged have mass are negatively charged 45 / 60 Category: JAMB CHEMISTRY PAST QUESTIONSThe radioisotope used in industrial radiography for the rapid checking of faults in welds and casting is Carbon-14 Iodine-131 Phosphorus-32 Cobalt-60 46 / 60 Category: JAMB CHEMISTRY PAST QUESTIONSWhat is the percentage of sulphur in sulphur (IV) oxide? 50% 40% 25% 66% 47 / 60 Category: JAMB CHEMISTRY PAST QUESTIONSThe periodic classification is an arrangement of the elements atomic numbers atomic weights molecular weights isotopic weights 48 / 60 Category: JAMB CHEMISTRY PAST QUESTIONSWhich of these alloys contains copper? solder bronze permallory steel 49 / 60 Category: JAMB CHEMISTRY PAST QUESTIONSThe gas that is most useful in protecting humans against solar marathon is ozone carbon IV oxide chlorine hydrogen sulphur 50 / 60 Category: JAMB CHEMISTRY PAST QUESTIONSThe tincture of iodine means iodine dissolved in water ethanol chlorine water bromine chloride 51 / 60 Category: JAMB CHEMISTRY PAST QUESTIONSIn a neutralization reaction involving HCI and NaOH using litmus as indicator, the colour at the end point is Blue Red Purple Orange 52 / 60 Category: JAMB CHEMISTRY PAST QUESTIONSThe process that requires the use of hardwater in its operation is Tanning Dyeing Bottling Laundry 53 / 60 Category: JAMB CHEMISTRY PAST QUESTIONSThe salt formed from a weak acid and a strong base hydrolyzes in water to form a saturated solution an acidic solution a buffer solution an alkaline solution 54 / 60 Category: JAMB CHEMISTRY PAST QUESTIONSWhich of the following statements is correct about the periodic table? Elements in the same group have the same number of electron shells 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 55 / 60 Category: JAMB CHEMISTRY PAST QUESTIONSThe leachate of a certain ash is used in local soap because it contain sodium hydroxide sodium chloride and potassium hydroxide soluble carbonates and hydrogen carbonate potassium hydroxide 56 / 60 Category: JAMB CHEMISTRY PAST QUESTIONSThere are basic particles from which matter called be made except Atom Salt Ion Molecule 57 / 60 Category: JAMB CHEMISTRY PAST QUESTIONSA synthetic rubber is obtained from the polymerization of butandiene propylene neoprene isoprene 58 / 60 Category: JAMB CHEMISTRY PAST QUESTIONSSieving is a technique used to separate mixtures containing solid particles of the same size different sizes large sizes small sizes 59 / 60 Category: JAMB CHEMISTRY PAST QUESTIONSThe situation obtained when a perfect gas expands into a vacuum is 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 ΔH is positive and TΔ S is zero 60 / 60 Category: JAMB CHEMISTRY PAST QUESTIONSAmmonium chloride can be separated from its mixture with common salt by Distillation Evaporation Decantation Sublimation Email Your score is LinkedIn Facebook Twitter VKontakte 0% Restart quiz Send feedback previousJAMB COMMERCE PAST QUESTIONSnextCOMMON WEALTH OF NATIONLeave a Reply Cancel reply Your email address will not be published. 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