11 mark
Which of these compounds is a tertiary alcohol?
2-methylpropan-2-ol
3-methylbutan-2-ol
2,2-dimethylpropan-1-ol
3,3-dimethylbutan-2-ol
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2.9 Organic Chemistry: Alcohols
21 mark
Which reagent would convert an alcohol into an alkene?
acidified potassium dichromate(VI)
anhydrous calcium sulfate
concentrated phosphoric acid
ethanolic potassium hydroxide
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11 mark
Which of these compounds does not react with acidified potassium dichromate(VI)?
CH3CH2OH
CH3CHOHCH3
CH3CH2CHO
CH3COCH3
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2a1 mark
Organic reactions can be classified in different ways.
a)
How should the reaction shown be classified?
addition
oxidation
polymerisation
substitution
2b1 mark
b)
How should the reaction shown be classified?
addition
oxidation
reduction
substitution
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3a1 mark
Some alcohols react with concentrated phosphoric(V) acid, H3PO4 , to form alkenes.
a)
What type of reaction occurs?
addition
elimination
hydrolysis
substitution
3b1 mark
b)
The structure of 2-methylpentan-3-ol is shown.
This alcohol reacts with concentrated phosphoric(V) acid.
How many different alkenes can form?
one
two
three
four
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4
1 mark
1 markWhat is the minimum volume of oxygen gas, measured at room temperature and pressure, required for the complete combustion of 9.2 g of C3H8O3 (Mr = 92)?
[Molar volume of gas at room temperature and pressure = 24.0 dm3 mol−1]
4.8 dm3
8.4 dm3
12.0 dm3
16.8 dm3
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51 mark
1 markThe oxidation of propan-1-ol by acidified potassium dichromate(VI) forms propanoic acid with a yield of 36% by mass.
What mass of propan-1-ol is needed to form 37.0 g of propanoic acid in this reaction?
[Mr of propanoic acid = 74 Mr of propan-1-ol = 60]
10.8 g
36.0 g
40.8 g
83.3 g
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