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Chemistry 2009 WAEC Past Questions

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21
Which of the following expressions correctly represents Charles' law?
  • A. PV = K
  • B. R \(\alpha \frac{1}{\sqrt{p}\)
  • C. PV = RT
  • D. V = KT
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22
In a mixture of gases which do not react chemically together, the pressure exerted by the individual gases is called
  • A. atmospheric pressure
  • B. partial pressure
  • C. total pressure
  • D. vapour pressure
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23
In a chemical reaction, ∆H is positive when
  • A. H (product) >H (reactant)
  • B. H(product) < H (reactant)
  • C. H (product) = H (reactant)
  • D. H (product) = Zero (reactant)
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24
Consider the reaction represented by the following equation: H 2(g) + \(\frac{1}{2}\) O(g) → H 2O(g) ∆H =-285.8 KJmo -1 ∆H represents the enthalpy of
  • A. formation
  • B. hydration
  • C. neutralization
  • D. solution
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25
Salts that contain water of crystallization are said to be
  • A. anhydrous
  • B. deliquescent
  • C. efflorescent
  • D. hydrated
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