16. Zn + 2HCL → ZnCl2 + H2
- 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 processes 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. C44H12O
- B. C33H9O
- 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
25. 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 in 29.5cm3 what will be the volume of the gas at 15ºc, the pressure remaining 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. CH3C≡CCH3
- D. CH3CH≡CHCH3
29. Calculate the value of ΔS if the heat change in the in system is 400j at -273ºC
- A. 40J/K
- B. 400J/K
- C. 4J/K
- D. 0.4J/K
30. Which of the following best represent solid gas mixture?
- A. milk
- B. kerosene
- C. soil
- D. smoke
