2022 – JAMB CHEMISTRY PAST QUESTIONS & ANSWERS CBT PRACTICE You can also check in for latest; 9JA Music Gospel Music Foreign Music 11 123456789101112131415161718192021222324252627282930 2022 - JAMB Chemistry Past Questions & Answers Cbt Practice 1 / 30 1. A coloured gas that is known to be poisonous and can readily damage the mucous lining of the lungs is? a) sulphur(iv)oxide b) chlorine c) hydrogen sulphide d) carbon(ii)oxide 2 / 30 2. An organic compound which liberates carbon(iv)oxide from trioxocarbonate(iv) solution is likely to be? a) C 2 H 5 OH b) C6H6 c) C 3 H4 d) CH 3 COOH 3 / 30 3. Using the metal activity series, the metal that can liberate hydrogen gas from steam is? a) Copper b) Lead c) iron d) Tin 4 / 30 4. How many neutrons are present in an atom with the mass number and atomic number 37 and 17 respectively? a) 20 b) 37 c) 18 d) 17 5 / 30 5. SO2 + O2 → 2SO3 In the reaction above, the most suitable catalyst is? a) iron(iii)oxide b) copper(i)oxide c) chromium(vi)oxide d) vanadium(v)oxide 6 / 30 6. If the volume of a given mass of a gas at 0ºc is 29.5cm3. What will be the volume of the gas at 15ºc, given that the pressure remains constant? a) 32.7 b) 31.1 c) 62.2 d) 31.6 7 / 30 7. An organic functional group which would likely decolourize ammoniacal silver nitrate is? a) alkanol b) alkane c) alkyne d) alkene 8 / 30 8. The addition of sodium chloride to water to form a solution would lead to? a) decrease in freezing point and decrease the boiling point b) increase in freezing point and decrease the boiling point c) decrease in freezing point and increase the boiling point d) increase in freezing point and increase the boiling point 9 / 30 9. Zn + 2HCL → ZnCl2 + H2 What happens to zinc in the above reaction? a) oxidized b) reduced c) A metal d) a reactant 10 / 30 10. A chemical widely used as a fertilizer is? a) nitrochalk b) emerald c) bauxite d) galena 11 / 30 11. In the preparation of salts, the method employed will depend on the? a) precipitating ability b) composition c) stability to heat d) dissociating ability 12 / 30 12. The IUPAC nomenclature of the structure shown is? a) 3-methylchlorobutane b) 2-chloro-2-methylbutane c) 3-chloro-3-methylbutane d) 2,2,-dichloro-3-methylbutane 13 / 30 13. The addition of charcoal to the filter bed of sand during water treatment for city supply is to? a) prevent tooth decay b) prevent goiter c) kill germs d) remove odour 14 / 30 14. An organic compound with a fishy smell is likely to have a general formula ___ a) RCONHR1 b) RNH2 c) RCONH2 d) RCOR1 15 / 30 15. An organic compound contains 69% carbon, 15.3% hydrogen and 30.7% oxygen. Calculate the the empirical formula [C=12, H = 1, O = 16] a) C3H8O b) C 4H12O c) C3H9O d) C4H9O 16 / 30 16. An organic compound which decolorizes bromine water is likely to be? a) C3H8 b) C2H4 c) C4H10 d) C2H6 17 / 30 17. N2O4 ⇔ 2NO2 (Δ = -ve) From the reaction above, which of these conditions would produce the highest equilibrium yield for N2O4? a) Low temperature and low pressure b) high temperature and high pressure c) high temperature and low pressure d) Low temperature and high pressure 18 / 30 18. The sub-atomic particles located in the nucleus of an atom are? a) neutron and proton b) neutron and electron c) proton and ions d) proton and electron 19 / 30 19. The pollutant that is usually present in a city which generates its electricity from coal? a) smog b) sulphur(iv)oxide c) carbon(ii)oxide d) fog 20 / 30 20. The following non-metal form acidic oxides with oxygen except? a) phosphorus b) chlorine c) carbon d) sulphur 21 / 30 21. In which of the following will hydrogen form an ionic compound? a) NaH b) CH4 c) HCL d) NH3 22 / 30 22. Which of the following best represents a solid gas mixture? a) milk b) kerosene c) smoke d) soil 23 / 30 23. Wrought iron is obtained by heating cast iron in a furnace with? a) haematite b) calcium trioxosilicate(iv) c) carbon(ii)oxide d) magnetite 24 / 30 24. When heat is absorbed during a chemical reaction, the reaction is said to be ___ a) isothermal b) thermodynamic c) endothermic d) exothermic 25 / 30 25. Crude petroleum is converted to useful products by the process of? a) chromatography b) filtration c) fractional crystallization d) fractional distillation 26 / 30 26. 2H2 + O2 → 2H2O From the equation above, calculate the volume of unreacted oxygen gas if a mixture of 50cm3 of hydrogen and 75cm3 of oxygen is involved a) 50cm³ b) 125cm³ c) 85cm³ d) 55cm³ 27 / 30 27. The sulphide that is commonly used in coating electric fluorescent tubes is? a) lead(iv) Sulphide b) iron(ii)Sulphide c) Zinc Sulphide d) tin(ii)sulphide 28 / 30 28. In order to electroplate spoon with silver, the arrangement of the electrolytic cell is? a) the anode is the spoon and the cathode is a silver rod b) the electrolyte is silver trioxonitrate(v) solution and the anode is the spoon c) the anode is a silver rod and the cathode is the spoon d) the electrolyte is silver trioxonitrate(v)( solution and the cathode is a silver rod. 29 / 30 29. On the basis of the electrochemical series, which of these ions will show the greater tendency to be discharged at the cathode in an electrolytic cell a) Zn2+ b) Sn2+ c) Cu2+ d) Fe2+ 30 / 30 30. In the extraction of iron, hot air is introduced into the blast furnace through? a) valves b) tuyeres c) arcs d) open-hearths Your score is The average score is 33% Restart Cbt Please click the stars to rate the quiz Send feedback
