Which of the following raw materials is used in the plastic industry?
- A. Ethene
- B. Methane
- C. Sulphur
- D. Hydrogen
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2. Which of the following organic compounds can undergo both addition and substitution reactions?
- A. Pentane
- B. Benzene
- C. Propane
- D. Hexane
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3. Which of the following equations represents a redox reaction?
- A. HNO3(aq)+NaOH(aq)→NaNO3(aq)+H2O(l)HNO3(aq)+NaOH(aq)→NaNO3(aq)+H2O(l)
- B. AgNO3(aq)+KCl(aq)→AgCl(s)+KNO3(aq)AgNO3(aq)+KCl(aq)→AgCl(s)+KNO3(aq)
- C. CaCO3(s)→CaO(s)+CO2(g)CaCO3(s)→CaO(s)+CO2(g)
- D. 2H2S(s)+SO2(g)→2HO2+3S(g)
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4. The process of extraction of iron from its ore is
- A. decomposition
- B. oxidation
- C. reduction
- D. sublimation
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5. What is the solubility of a salt if 0.4g of it is obtained on evaporating 200cm3cm3 of its saturated solution to dryness?
- A. 0.08gdm−3gdm−3
- B. 2.00gdm−3gdm−3
- C. 8.00gdm−3gdm−3
- D. 80.00gdm−3
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6. An acidic salt has
- A. double anions in its aqueous solution
- B. a single cation in its aqueous solution
- C. hydrogen ions in its aqueous solution
- D. hydrogen atoms in its aqueous solution
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7. Which of the following is an example of a chemical change?
- A. Dissolution of salt in water
- B. Rusting of iron
- C. Melting of ice
- D. Separating a mixture by distillation
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8. A reaction is endothermic if the
- A. reaction vessel feels cool during the reaction
- B. enthalpy change is negative
- C. bond forming energy exceeds bond breaking energy
- D. heat of formation of reactants exceeds heat of formation of products
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9. In which of the following compounds does hydrogen form ionic compounds?
- A. CH44
- B. HCl
- C. NH33
- D. NaH
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10. An organic compound has the empirical formula CH2CH2. If its molar mass is 42gmol−1gmol−1, what is its molecular formula? (C = 12.0, H = 1.0)
- A. C2H4C2H4
- B. C3H4C3H4
- C. C3H6C3H6
- D. C4H8
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