WAEC GCE Chemistry Question and Answers to objectives and Theory 2022/2023. Download likely verified WAEC GCE Chemistry Expo/runs, and learn how to answer the Ongoing WAEC GCE 2022 Chemistry Questions Paper 1 & 2 today.
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WAEC GCE Chemistry 2022 Objectives Questions and Answers
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WAEC GCE CHEMISTRY OBJ
1. An acid is a substance in which present of water produces….
- A. Salt
- B. Oxygen
- C. Hydrogen
- D. Hydroxonium ions.
2. Which of the following is a general methods o preparing acid?
- A. Direct Combination of constituents
- B. Reaction between anhydride and water
- C. Reaction between base and amphotric oxide
- D. Dissolution of hydroxides followed by neutralization
3. The number of Hydroxonium ions produced by one molecule of an acid in aqueous Solution is it’s
- A. Acidity
- B. Basicity
- C. Concentration
- D. pH
4. The important basic raw materials for the chemical industries are the following except
- A. Air
- B. Petroleum
- C. Limestone
- D. Water
5. Example of Chemical include except
- A. Dye stuff
- B. Additives
- C. Perfumes
- D. Sodium hydroxides
6. Plastic are polymers whose production technique involves all except
- A. High pressure
- B. Low temperature
- C. High temperature
- D. Salting
7. What quantity of electron ( in one mile) is lost when one mile of ion(II) ions oxidized to ion (III) ions
- A. 4 moles
- B. 3 moles
- C. 2 moles
- D. 1 mole
8. The entropy and enthalpy is a system are a measure of
- A. A degree of disorderliness and heat content respectively
- B. Heat content and degree of disorderliness respectively
- C. Heat content of a system only
- D. Degree of disorderliness only.
9. The function of cotton wool in Chemical reaction is to..
- A. Support the smaller breaker
- B. Reduce heat loss from the system
- C. Absorb any liquid that spills over
- D. Protect the reactants from light.
Chemistry Essay WAEC GCE Questions and Answers 2022 PDF
Past Essay Answers
They both have the same number of electron in the outermost shell
Mg^2+->Na^+->Ne The size of positive ion is less than that of the neutral atom
C-F>C-O>C-N>C-H(order of polarity).
4Be=1S^2 2S^2 12mg =1S^2 2S^2 2P^6 3S^2.
4Be and 12Mg have similar chemical properties because they belong to the same group in the periodic table. Both
4Be and 12Mg belongs to group II in the periodic table hence they have similar chemical properties.
Transition element: Transition elements are those element with partially or incompletely filled d-orbital. Transition metal form coloured ion (or compound), they acts as catalyst,they have variable oxidation stat, they are paramagnetic, they form complex compound or coordination compound
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