2022 Chemistry

1. The sub-atomic particles located in the nucleus of an atom are?

• A. neutron and proton
• B. proton and electron
• C. proton and ions
• D. neutron and electron

2.

The IUPAC nomenclature of the structure is?

• A. 3-chloro-3-methylbutane
• B. 2,2,-dichloro-3-methylbutane
• C. 3-methylchlorobutane
• D. 2-chloro-2-methylbutane

3. SO₂+ O₂→ 2SO₃

In the reaction above, the most suitable catalyst is?

• A. chromium(vi)oxide
• B. iron(iii)oxide
• C. copper(i)oxide
• D. vanadium(v)oxide

4. In the preparation of salts, the method employed will depend on the?

• A. composition
• B. dissociating ability
• C. stability to heat
• D. precipitating ability

5. The following non-metal form acidic oxides with oxygen except?

• A. phosphorus
• B. sulphur
• C. carbon
• D. chlorine

6. How many neutrons are present in atom with mass number and atomic number 37 and 17 respectively?

• A. 18
• B. 20
• C. 37
• D. 17

7. The sulphide that is commonly used in coating electric fluorescent tubes is?

• A. iron(ii)Sulphide
• B. tin(ii)sulphide
• C. Zinc Sulphide
• D. lead(iv) Sulphide

8. An organic compound which liberate carbon(iv)oxide from trioxocarbonate(iv) solution is likely to be?

• A. C₂H₅OH
• B. C₃H₄
• C. C₆H₆
• D. CH₃COOH

9. Addition of sodium chloride to water to form a solution would lead to?

• A. increase in freezing point and increase the boiling point
• B. increase in freezing point and decrease the boiling point
• C. decrease in freezing point and decrease the boiling point
• D. decrease in freezing point and increase the boiling point

10. A chemical widely used as a fertilizer is?

• A. galena
• B. bauxite
• C. emerald
• D. nitrochalk

11. 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. cu²⁺
• B. sn²⁺
• C. fe²⁺
• D. zn²⁺

12. Addition of charcoal to the filter bed of sand during water treatment for township supply is to?

• A. prevent goiter
• B. prevent tooth decay
• C. remove odour
• D. kill germs

13. Using the metal activity series, the metal that can liberate hydrogen gas from steam is?

• A. iron
• B. copper
• C. tin
• D. lead

14. An organic compound with fishy smell is likely to have a general formula?

• A. RCONHR¹
• A. RCONH₂
• C. RNH₂
• D. RCOR¹

15. N₂O₄⇔ 2NO₂         (Δ = -ve)

From the reaction above, which of these conditions would produce the highest equilibrium yield for N₂O₄?

• A. Low temperature and high pressure
• B. Low temperature and low pressure
• C. high temperature and low pressure
• D. high temperature and high pressure

16. Zn + 2HCL → ZnCl₂+ H₂

What happens to zinc in the above reaction?

• A. oxidized
• B. a reactant
• C. reduced
• D. a metal

17. An organic functional group which can likely decolorize ammoniacal silver nitrate is?

• A. alkene
• B. alkane
• C. alkyne
• D. alkanol

18. A colored gas that is known to be poisonous and can readily damage the mucous lining of the lungs is?

• A. hydrogen sulphide
• B. carbon(ii)oxide
• C. chlorine
• D. sulphur(iv)oxide

19. In order to electroplate spoon with silver, the arrangement of the electrolytic cell is?

• A. the anode is a silver rod and the cathode is the spoon
• B. the anode is the spoon and the cathode is a silver rod
• C. the electrolyte is silver trioxonitrate(v)( solution and the cathode is a silver rod.
• D. the electrolyte is silver trioxonitrate(v) solution and the anode is the spoon

20. An organic compound which decolorizes bromine water is likely to be?

• A. C₃H₈
• B. C₂H₆
• C. C₄H₁0
• D. C₂H₄

21. Crude petroleum is converted to useful products by the process of?

• A. fractional crystallization
• B. fractional distillation
• C. filtration
• D. chromatography

22. 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. C₄H₁₂O
• B. C₃H₉O
• C. C₄H₉O
• D. C₃H₈O

23. 2H₂+ O₂→ 2H₂O

From the equation above, calculate the volume of unreacted oxygen gas if a mixture of 50cm³ of hydroden and 75cm³ of oxygen are involved

• A. 85cm³
• B. 50cm³
• C. 125cm³
• D. 55cm³

24. In which of the following will hydrogen form ionic compound? 

• A. HCL
• B. NaH
• C. NH₃
• D. CH₄

25. If the volume of a given mass of a gas at 0ºc is 29.5cm33. What will be the volume of the gas at 15ºc, given that the pressure remains constant. 

• A. 31.6
• B. 62.2
• C. 32.7
• D. 31.1

26. The reactions below represent neutralization reaction, in which of them is the value of ΔH highest?

• A. CH₃CH₂COOH + KOH → CH₃CH₂COOK + H₂O
• B. NH₄OH + HCL → NH₄ + H₂O
• C. NaOH + HCL → NaCL + H₂O
• D. CH₃COOH + NaOH → CH₃COONa + H₂O

27. The pollutant usually presents in a city which generates its electricity from coal?

• A. fog
• B. carbon(ii)oxide
• C. smog
• D. sulphur(iv)oxide

28. The dehydration of CH₃CH₂CH₂CH₂OH will give?

• A. HC≡CCH₂CH₃
• B. CH₂≡CH₂CH₃
• C. C_H3C≡CCH₃
• D. CH₃CH=CHCH₃

29. When heat is absorbed during a chemical reaction, the reaction is said to be

• A. thermodynamic
• B. exothermic
• C. isothermal
• D. endothermic

30. Which of the following best represent solid gas mixture?

• A. milk
• B. kerosene
• C. soil
• D. smoke

31. H⁺+ OH⁻→ H₂O

The equation above illustrates

• A. precipitation
• B. hydration
• C. hydrolysis
• D. neutralization

32. Electrons enter into orbitals in order of increasing energy as exemplified by?

• A. 1S²2S²2PX²2py²2pz⁰3s0
• B. 1S²2S2²PX²2py¹2pz¹3s⁰
• C. 1S²2S²2PX¹2py¹2pz¹3s¹
• D. 1S²2S²2PX2²py2²pz⁰3s¹

33. Wrought iron is obtained by heating cast iron in a furnace with?

• A. magnetite
• B. haematite
• C. carbon(ii)oxide
• D. calcium trioxosilicate(iv)

34. In the extraction of iron, hot air is introduced into the blast furnace through?

• A. valves
• B. open-hearths
• C. arcs
• D. tuyeres

35. How many bonding pair are present in carbon(iv)oxide? 

• A. 4
• B. 3
• C. 2
• D. 1

36. 2-methylprop-1-ene is a structural isomer of?

• A.  But-1-yne
• B. 2-methyl But-1-ene
• C. 3-methyl prop-1-yne
• D.  But-2-ene

37. Alkanes are used mainly?

• A. in the textile industry
• B. in the hydrogenation of oils
• C. as domestic and industrial fuels
• D. as fine chemicals

38. What volume of (dm³) of water will be added to 10dm³of 2.0 mol/dm³HCL acid solution to give a final solution of 0.5 mol/dm³?

• A. 30
• B. 40
• C. 20
• D. 50

39

GAS	CO2	N2	O2
% BY VOLUME	4	72	24

The above table shows the compositions of the atmosphere of planet X. Which of these gases are present in higher percentages on earth?

• A. CO₂ and O₂
• B. N₂ and CO₂
• C. CO₂, O₂ and N₂
• D. O₂ and N₂

40. Hard water is water with high concentrations of dissolved ions, in particular calcium and

• A. magnesium ions
• B. nitrogen ions
• C. phosporus ions
• D. helium ions