Lesson 17C.1
17C.1 Carboxylic acids: structure and preparation Quiz: Pearson Edexcel Chemistry, Unit 17
20 questions
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Lesson 17C.1, Carboxylic acids: structure and preparation: 20 multiple choice questions for the Pearson Edexcel Chemistry (9CH0), Unit 17: Organic Chemistry II, written with Revision Ninja.
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The 20 questions
-
What is the name of the functional group found in carboxylic acids?
- Ester group
- Hydroxyl group
- Carbonyl group
- Carboxyl group
-
What structural feature causes carboxylic acids to have higher boiling points than alcohols?
- Covalent chains
- Hydrogen-bonded dimers
- Cyclic structures
- Ionic lattices
-
Which reagent oxidises a primary alcohol to a carboxylic acid under reflux?
- Lithium tetrahydridoaluminate
- Sodium borohydride
- Acidified potassium dichromate(VI)
- Concentrated sulfuric acid
-
What organic product forms when a nitrile is heated under reflux with dilute acid?
- Amide
- Acyl chloride
- Primary amine
- Carboxylic acid
-
What type of reaction occurs between ethanoic acid and sodium hydroxide?
- Oxidation
- Neutralisation
- Esterification
- Reduction
-
Which product forms when a carboxylic acid is reduced using lithium tetrahydridoaluminate?
- Aldehyde
- Ketone
- Primary alcohol
- Secondary alcohol
-
Carboxylic acids react with phosphorus(V) chloride. What is the organic product?
- A nitrile
- An acyl chloride
- An alkene
- A primary alcohol
-
Which catalyst is used with an alcohol to prepare an ester from a carboxylic acid?
- Aqueous potassium dichromate
- Dry ether solution
- Dilute sodium hydroxide
- Concentrated sulfuric acid
-
Which reverse process makes the esterification of a carboxylic acid reversible?
- Alcohol oxidation
- Acid neutralisation
- Nitrile reduction
- Ester hydrolysis
-
Which apparatus setup is required to oxidise ethanol directly to ethanoic acid?
- Filtration under suction
- Heating under reflux
- Fractional distillation
- Simple distillation
-
Which functional group is present in an ester?
- -OH
- -COO-
- -CHO
- -COOH
-
Why does solubility in water decrease as carboxylic acid chain length increases?
- Non-polar chain lengthens
- Carboxyl group disappears
- Ionic bonding strengthens
- Hydrogen bonding increases
-
Which functional group is hydrolysed to produce a carboxylic acid?
- Ketone
- Nitrile
- Alkene
- Haloalkane
-
Which gas is evolved when ethanoic acid reacts with sodium carbonate?
- Oxygen
- Nitrogen
- Carbon dioxide
- Hydrogen
-
Why must reduction of a carboxylic acid with lithium tetrahydridoaluminate be carried out in dry ether?
- Prevents oxidation
- Ether is catalyst
- Acid is insoluble
- Reacts with water
-
Which ester is formed when ethanoic acid reacts with ethanol in the presence of an acid catalyst?
- Ethyl propanoate
- Ethyl ethanoate
- Methyl ethanoate
- Propyl ethanoate
-
Which observation confirms that an unknown organic compound is a carboxylic acid when adding sodium hydrogencarbonate?
- White precipitate
- Colour change
- Effervescence
- Steamy fumes
-
What is the molecular formula of the ester formed from methanoic acid and propan-1-ol?
- C4H10O2
- C4H8O2
- C3H6O2
- C3H8O2
-
What is the name of the ester formed from ethanoic acid and ethanol?
- Ethanol ethanoate
- Methyl propanoate
- Ethyl ethanoate
- Ethyl ethanoic acid
-
Which reagent oxidises an aldehyde to a carboxylic acid?
- Sodium hydrogencarbonate
- Acidified potassium dichromate(VI)
- Lithium tetrahydridoaluminate
- Concentrated sulfuric acid
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