JAMB CHEMISTRY PAST QUESTIONS School Portal NG51 years agoJAMB 2+ 294 Views 0% 4 Uncategorized 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 reaction of halogens in the presence of sunlight is an example of hydrogenation reaction oxidation reaction addition reaction substitution reaction 2 / 60 Category: JAMB CHEMISTRY PAST QUESTIONS When ΔH is negative, a reaction is said to be exothermic endothermic reversible ionic 3 / 60 Category: JAMB CHEMISTRY PAST QUESTIONS An oxidation state of or in K2CrO7 6 5 7 4 4 / 60 Category: JAMB CHEMISTRY PAST QUESTIONS The weakest attractive force that can be observed between two molecules is co-ordinate covalent covalent ionic vander Waals 5 / 60 Category: JAMB CHEMISTRY PAST QUESTIONS Which of the following metals cannot replace hydrogen from water or steam? Magnesium Calcium Iron Sodium 6 / 60 Category: JAMB CHEMISTRY PAST QUESTIONS Which of the following represents the kind of bonding present in ammonium chloride? ionic only covalent only ionic and dative covalent dative covalent 7 / 60 Category: JAMB CHEMISTRY PAST QUESTIONS The situation obtained when a perfect gas expands into a vacuum is ΔH is positive and T Δ S is negative ΔH is positive and TΔ S is zero ΔH is zero and T Δ S is positive ΔH is negative and TΔ S is zero 8 / 60 Category: JAMB CHEMISTRY PAST QUESTIONS A mixture is different from a compound because the properties of a compound are those of its individual constituents while those of a mixture differ from its constituents 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 a mixture can be represented by a chemical formula while a compound cannot 9 / 60 Category: JAMB CHEMISTRY PAST QUESTIONS The ionic radii of metals are usually greater than their atomic radii unaffected by the charge on the ion the same as their atomic radii less than their atomic radii 10 / 60 Category: JAMB CHEMISTRY PAST QUESTIONS The ability of carbon to form long chains is referred to as Alkylation Carbonation Acylation Catenation 11 / 60 Category: JAMB CHEMISTRY PAST QUESTIONS When ammonia and hydrogen ion bond together to form ammonium ion, the bond formed is called covalent bond ionic bond electrovalent bond co-ordinate bond 12 / 60 Category: JAMB CHEMISTRY PAST QUESTIONS Sieving is a technique used to separate mixtures containing solid particles of large sizes the same size small sizes different sizes 13 / 60 Category: JAMB CHEMISTRY PAST QUESTIONS The radioisotope used in industrial radiography for the rapid checking of faults in welds and casting is Cobalt-60 Carbon-14 Phosphorus-32 Iodine-131 14 / 60 Category: JAMB CHEMISTRY PAST QUESTIONS Calculate the percentage composition of oxygen in calcium trioxocarbonate(IV) [Ca=40, C=12, O=16] 12 40 48 16 15 / 60 Category: JAMB CHEMISTRY PAST QUESTIONS The number of isomers formed by C6H14 is 4 5 2 3 16 / 60 Category: JAMB CHEMISTRY PAST QUESTIONS Diamond cannot be used In making bicycle chains In cutting glass and metals As abrasives As dies for drawing wires 17 / 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 but no gas is evolved the litmus turns blue and hydrogen is evolved the litmus turns red and oxygen is evolved the litmus turns blue and oxygen is evolved 18 / 60 Category: JAMB CHEMISTRY PAST QUESTIONS Cast iron is used in making Iron sheets and retort stand Nails and iron rods Stoves and cookers Chains and agricultural implements 19 / 60 Category: JAMB CHEMISTRY PAST QUESTIONS The enzyme used in the hydrolysis of starch to dextrin and maltose is invertase amylase zymase diastatse 20 / 60 Category: JAMB CHEMISTRY PAST QUESTIONS Aluminium hydroxide is used in the dyeing industry as a salt mordant dye dispersant 21 / 60 Category: JAMB CHEMISTRY PAST QUESTIONS When salt loses its water of crystallization to the atmosphere on exposure, the process is said to be fluorescence efflorescence déliquescence effervescence 22 / 60 Category: JAMB CHEMISTRY PAST QUESTIONS The ideal gas laws and equations are true for all gases at high pressures and high temperatures low pressures and lower temperatures low temperatures and high pressures low pressure and high temperatures 23 / 60 Category: JAMB CHEMISTRY PAST QUESTIONS Tin is unaffected by air at ordinary temperature due to its Weak electropositive character Low melting point High boiling point White lustrous appearance 24 / 60 Category: JAMB CHEMISTRY PAST QUESTIONS A liquid that will dissolve fat is water calcium hydrochloride kerosene hydrochloric acid 25 / 60 Category: JAMB CHEMISTRY PAST QUESTIONS The constituent common to duralumin and alnico is Co Mg Mn Al 26 / 60 Category: JAMB CHEMISTRY PAST QUESTIONS The arrangement of particles in crystal lattices can be studied using X-rays γ-rays α-rays β-rays 27 / 60 Category: JAMB CHEMISTRY PAST QUESTIONS Hydrogen can be displaced from a lot alkaline solution by Cn Cu Fe Sn 28 / 60 Category: JAMB CHEMISTRY PAST QUESTIONS The tincture of iodine means iodine dissolved in ethanol bromine chloride water chlorine water 29 / 60 Category: JAMB CHEMISTRY PAST QUESTIONS The elements that belong to the third period of periodic table are B, C, N, and O Na, P, O and Cl N2, Mg, S and Ar Li, Be, Al and D 30 / 60 Category: JAMB CHEMISTRY PAST QUESTIONS What technique is suitable for separating a binary solution of potassium chloride and potassium trioxochlorate (V)? Fractional distillation Fractional crystallization Filtration Evaporation 31 / 60 Category: JAMB CHEMISTRY PAST QUESTIONS Flow of current in electrolytes is due to the movement of Electrons Charges Ions holes and electron 32 / 60 Category: JAMB CHEMISTRY PAST QUESTIONS All these are electromagnetic waves except White light Photon X-ray Infrared 33 / 60 Category: JAMB CHEMISTRY PAST QUESTIONS Tartaric acid is used industrially to remove rust make fruit juice make baking powder dry substance 34 / 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 have mass are negatively charged are positively charged travel in straight lines 35 / 60 Category: JAMB CHEMISTRY PAST QUESTIONS A major source of oxide of oxygen is from the burning of coal fuel chlorofluorocarbons wood 36 / 60 Category: JAMB CHEMISTRY PAST QUESTIONS The energy value of petrol can be determined by Fractionating column Bomb calorimeter Catalytic cracker Thermometer 37 / 60 Category: JAMB CHEMISTRY PAST QUESTIONS The derivative of benzene that can be used in making explosives is aniline phenol toluene xylene 38 / 60 Category: JAMB CHEMISTRY PAST QUESTIONS Burning magnesium ribbon in air removes which of the following(i) oxygen (ii) nitrogen (iii) argon and (iv) carbon(iv)oxide? i and iv only i, ii, iii and iv only i and ii only i only 39 / 60 Category: JAMB CHEMISTRY PAST QUESTIONS The above orbital diagram shown the electronic configuration of chlorine neon nitrogen calcium 40 / 60 Category: JAMB CHEMISTRY PAST QUESTIONS The number of electronic shells contained in an atom with electron configuration 1s22s22p63s23p64s2 is 2 4 5 3 41 / 60 Category: JAMB CHEMISTRY PAST QUESTIONS Which of the following will give a precipitate with an aqueous solution of copper (I) chloride? But-2-ene But-2-yne But-1-yne But-1-ene 42 / 60 Category: JAMB CHEMISTRY PAST QUESTIONS The oxidation number of iodine in KIO3 is +3 +6 +7 +5 43 / 60 Category: JAMB CHEMISTRY PAST QUESTIONS Vulcanization involve the removal of the single bond the double bond a polymer monometer 44 / 60 Category: JAMB CHEMISTRY PAST QUESTIONS In 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 45 / 60 Category: JAMB CHEMISTRY PAST QUESTIONS Which of the following is an example of a chemical change? dissolution of salt in water melting of ice rusting of iron separating a mixture by distillation 46 / 60 Category: JAMB CHEMISTRY PAST QUESTIONS The colour of litmus in an alkaline medium is Red Blue Yellow Pink 47 / 60 Category: JAMB CHEMISTRY PAST QUESTIONS Which of the following is the best starting material for the preparation of oxygen? Heating of trioxonitrate (v) with Pb Zn Na Ca 48 / 60 Category: JAMB CHEMISTRY PAST QUESTIONS An isomer of C5H12 is butane 2–methyl butane 2–ethyl butane 2–methyl propane 49 / 60 Category: JAMB CHEMISTRY PAST QUESTIONS A small quantity of solid ammonium chloride (NH4Cl) texted gently in a test tube, the solid gradually disappear produce two gases. Later, a white cloudy deposit was absence on the cooler part of the test tube. The ammonium chloride is to have undergo distillation precipitation evaporation sublimation 50 / 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 a buffer solution an acidic solution a saturated solution 51 / 60 Category: JAMB CHEMISTRY PAST QUESTIONS Which of the following properties is not peculiar to matter? Random motion of particles increases from liquid to gas Random motion of particles increases from gas to solid Orderliness of particles increases from gas to liquid Kinetic energy of particles increases from solid to gas 52 / 60 Category: JAMB CHEMISTRY PAST QUESTIONS The periodic classification is an arrangement of the elements isotopic weights molecular weights atomic weights atomic numbers 53 / 60 Category: JAMB CHEMISTRY PAST QUESTIONS The filter in the cigarette reduce the nicotine construct by absorption burning evaporation absorption 54 / 60 Category: JAMB CHEMISTRY PAST QUESTIONS An element used in the production of matches is sulphur copper aluminium nitrogen 55 / 60 Category: JAMB CHEMISTRY PAST QUESTIONS Which of the following statements is correct about the periodic table? The valence electrons of the elements in the same period increase progressively across the period Elements in the same period have the same number of valence electrons 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 56 / 60 Category: JAMB CHEMISTRY PAST QUESTIONS Which of the following does not support the fact that air is a mixture? none of the above the constituents of air are in a fixed proportion by mass the constituents of air can be separated by physical by physical means it cannot be represented with a chemical formula 57 / 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? Elements in the same period have the same number of valence electrons 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 58 / 60 Category: JAMB CHEMISTRY PAST QUESTIONS The industrial preparation of hydrogen gas from water gas is referred to as Bosch process Contact process Haber process Bayer Process 59 / 60 Category: JAMB CHEMISTRY PAST QUESTIONS Atomicity of ozone is 1 4 3 2 60 / 60 Category: JAMB CHEMISTRY PAST QUESTIONS P1V1 = P2V2 supports ? Graham’s law Charles’s law Avogadro’s law Boyles’s law Your score is LinkedIn Facebook Twitter 0% Restart quiz Send feedback 2+ Recommeded Lessons:CHEMISTRY POST UTME (PRO)BECE BASIC TECHNOLOGY PAST QUESTIONSJAMB MATHEMATICS PAST QUESTIONSECONOMICS POST UTME (PRO)JAMB COMMERCE PAST QUESTIONS
