Worksheets

Read and answer correctly each statement.

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Fill in each blank with the most appropriate term, phrase or value. 

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Review pages Inspire Chemistry page 594.

Compare and contrast the structure and properties of unsaturated fats and saturated fats.

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Type of Reaction : Electrophilic Aromatic Substitution Reaction Reagent : R-Cl in the presence of Lewis acid catalyst, AlCl3 Conditions : Room temperature. Electrophilic species : Carbocation (the rearrangement of carbocation to form more stable carbocation is possible)

Type of Reaction : Electrophilic Aromatic Substitution Reaction Reagent : R-Cl in the presence of Lewis acid catalyst, AlCl3 Conditions : Room temperature. Electrophilic species : Carbocation (the rearrangement of carbocation to form more stable carbocation is possible)

Type of Reaction : Electrophilic Aromatic Substitution Reaction Reagent : Concentrated HNO3 in concentrated H2SO4 (as catalyst) Conditions : Heat (50-55 degree C) Electrophilic species : Nitronium ion, NO2+

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Type of Reaction : Electrophilic Aromatic Substitution Reaction Reagent : Br2 or Cl2 in the presence of Lewis acid catalyst (FeBr3 or FeCl3) Conditions : Room temperature Electrophilic species : Chloronium ion, Cl+ or bromonium ion

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Write down the pH value that you obtained. Then, according to that value, differentiate them into acidic or basic items.

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Dear students,

I have attached As Level Chemistry May/June 2025 Paper 13. Please read the instructions and information on the paper.

Please take note that there are only 36 questions.

Goodluck!