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Lesson 6: Carboxylic Acids, Esters and Organic Polymers — Picture questions (exam style)

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  • Questions count: 13
  • Passing grade: 60%
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1.
Study the scheme. Which option is correct?
Study the scheme. Which option is correct?
(X): sodium phenoxide, (W): benzene
(X): benzene, (W): phenol
(X): benzene, (W): methylbenzene
(X): sodium benzoate, (W): benzene
2.
30 g of methanoic acid is heated with excess ethyl alcohol and a little conc. H₂SO₄; the yield is 80%. What mass of ester forms? (see molar masses)
30 g of methanoic acid is heated with excess ethyl alcohol and a little conc. H₂SO₄; the yield is 80%. What mass of ester forms? (see molar masses)
48.0 g
38.6 g
48.3 g
24.0 g
3.
What are the products of alkaline (saponification) hydrolysis of the ester shown?
What are the products of alkaline (saponification) hydrolysis of the ester shown?
sodium butanoate + propyl alcohol
benzoic acid + propyl alcohol
sodium butanoate + methyl alcohol
butanoic acid + an alkene
4.
1.7 g of a monoprotic acid CₙH₂ₙ₊₁COOH is titrated with 0.2 M NaOH, needing 83.33 mL. What is the acid?
1.7 g of a monoprotic acid CₙH₂ₙ₊₁COOH is titrated with 0.2 M NaOH, needing 83.33 mL. What is the acid?
CH₃COOH
C₅H₁₁COOH
C₆H₁₃COOH
C₃H₇COOH
5.
Study the scheme. Which option is correct?
Study the scheme. Which option is correct?
(X): sodium ethanoate, (Y): ethanol
(X): sodium ethanoate, (Y): ethanal
(X): ethanoic acid, (Y): ethanol
(X): sodium ethanoate, (Y): methanol
6.
12 g of butanoic acid is heated with excess methyl alcohol and a little conc. H₂SO₄; the yield is 60%. What mass of ester forms? (see molar masses)
12 g of butanoic acid is heated with excess methyl alcohol and a little conc. H₂SO₄; the yield is 60%. What mass of ester forms? (see molar masses)
13.9 g
9.82 g
8.35 g
7.20 g
7.
18 g of propanoic acid is heated with excess methyl alcohol and a little conc. H₂SO₄; the yield is 50%. What mass of ester forms? (see molar masses)
18 g of propanoic acid is heated with excess methyl alcohol and a little conc. H₂SO₄; the yield is 50%. What mass of ester forms? (see molar masses)
12.9 g
10.7 g
21.4 g
9.00 g
8.
3 g of propanoic acid is heated with excess pentyl alcohol and a little conc. H₂SO₄; the yield is 67%. What mass of ester forms? (see molar masses)
3 g of propanoic acid is heated with excess pentyl alcohol and a little conc. H₂SO₄; the yield is 67%. What mass of ester forms? (see molar masses)
2.01 g
5.84 g
3.91 g
4.40 g
9.
15 g of propanoic acid is heated with excess propyl alcohol and a little conc. H₂SO₄; the yield is 75%. What mass of ester forms? (see molar masses)
15 g of propanoic acid is heated with excess propyl alcohol and a little conc. H₂SO₄; the yield is 75%. What mass of ester forms? (see molar masses)
17.6 g
23.5 g
11.2 g
20.4 g
10.
18 g of ethanoic acid is heated with excess butyl alcohol and a little conc. H₂SO₄; the yield is 60%. What mass of ester forms? (see molar masses)
18 g of ethanoic acid is heated with excess butyl alcohol and a little conc. H₂SO₄; the yield is 60%. What mass of ester forms? (see molar masses)
10.8 g
34.8 g
20.9 g
24.1 g
11.
30 g of ethanoic acid is heated with excess ethyl alcohol and a little conc. H₂SO₄; the yield is 75%. What mass of ester forms? (see molar masses)
30 g of ethanoic acid is heated with excess ethyl alcohol and a little conc. H₂SO₄; the yield is 75%. What mass of ester forms? (see molar masses)
39.8 g
33.0 g
22.5 g
44.0 g
12.
30 g of butanoic acid is heated with excess propyl alcohol and a little conc. H₂SO₄; the yield is 50%. What mass of ester forms? (see molar masses)
30 g of butanoic acid is heated with excess propyl alcohol and a little conc. H₂SO₄; the yield is 50%. What mass of ester forms? (see molar masses)
22.2 g
44.3 g
25.2 g
15.0 g
13.
30 g of ethanoic acid is heated with excess methyl alcohol and a little conc. H₂SO₄; the yield is 90%. What mass of ester forms? (see molar masses)
30 g of ethanoic acid is heated with excess methyl alcohol and a little conc. H₂SO₄; the yield is 90%. What mass of ester forms? (see molar masses)
33.3 g
41.4 g
37.0 g
27.0 g
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