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OCR A Level Organic Chemistry | Questions with 100 % correct answers | verified

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Conditions for oxidation of primary alcohols to aldehydes [O] - Acidified potassium dichromate (VII) Distillation Conditions for oxidation of primary alcohols to carboxylic acids 2[O] - Acidified potassium dichromate (VII) Reflux Conditions for oxidation of secondary alcohols to ketones [O] - Acidified potassium dichromate (VII) Reflux Colour change for reduction of dichromate (VII) ions - Orange to Green Conditions for oxidation of tertiary alcohols - Do not oxidise under normal conditions Conditions for dehydration of alcohols to alkenes - Concentrated phosphoric acid Reflux Conditions for substitution of alcohols and hydrogen halides to haloalkanes (Alcohol to Haloalkane) - Concentrated sulphuric acid Reflux Substitution of alcohols reaction intermediate that is formed during reflux - Hydrogen halide Conditions for hydration of alkenes to alcohols (Alkene to Alcohol) - Steam Phosphoric acid(Electrophilic Addition) Conditions for halogenation of alkenes (Alkene to Haloalkane) - Room temperature If hydrogen halides are used they must be in gaseous state (Electrophilic Addition) Conditions for hydrogenation of alkenes to alkanes (Alkene to Alkane) - Nickel catalyst 423 K (Electrophilic Addition) Condition for halogenation of alkanes (Alkane to Haloalkane) - UV light (Free Radical Substitution)


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