Question
Some properties of an organic compound $\mathrm{J}$ are listed.
- It is a liquid at room temperature.
- It is soluble in water.
- A solution of $\mathrm{J}$ reacts with calcium carbonate to form carbon dioxide.
- A solution of $\mathrm{J}$ has a $\mathrm{pH}$ of 3 .
In which homologous series does $\mathrm{J}$ belong?
A alkane
B alkene
C alcohol
D carboxylic acid
▶️Answer/Explanation
Ans:D
Question
Which statements about aqueous ethanoic acid are correct?
1 It is an alkane.
2 It reacts with sodium carbonate to form carbon dioxide.
3 It changes the colour of litmus solution from blue to red.
4 It is a hydrocarbon.
A 1 and 2
B 1 and 4
C 2 and 3
D 3 and 4
▶️Answer/Explanation
Ans:C
Question
Some information about compound L is listed.
1 L is an organic compound which contains four hydrogen atoms.
2 L is soluble in water.
3 An aqueous solution of L reacts with copper(II) carbonate to produce a gas.
What is L?
A methane
B ethene
C ethanoic acid
D ethanol
Answer/Explanation
Ans: C
Question
Which statement about aqueous ethanoic acid is correct?
A It reacts with magnesium to produce a salt and hydrogen.
B It reacts with sodium hydroxide to produce a salt and hydrogen.
C It reacts with ammonium salts to produce ammonia.
D It turns red litmus blue.
Answer/Explanation
Ans: A
Question
Which statements about ethanoic acid are correct?
1 It contains a carbon–oxygen double bond.
2 It contains two carbon atoms.
3 It decolourises bromine water.
4 It contains an –OH group.
A 1 and 2 only B 1 and 3 C 1, 2 and 4 D 2, 3 and 4
Answer/Explanation
Ans: C
Question
Which statements about aqueous ethanoic acid are correct?
1 Ethanoic acid contains the functional group –COOH.
2 Ethanoic acid reacts with carbonates to produce hydrogen.
3 Ethanoic acid turns Universal Indicator paper blue.
4 Ethanoic acid has a pH lower than pH 7.
A. 1 and 2 B. 1 and 3 C. 1 and 4 D. 2 and 4
Answer/Explanation
Ans:
C
Question
Which statements about aqueous ethanoic acid are correct?
- It has a pH value of 10.
- It reacts with metal carbonates to produce carbon dioxide gas.
- It reacts with magnesium metal to produce hydrogen gas.
A 1, 2 and 3 B 1 and 2 only C 1 and 3 only D 2 and 3 only
Answer/Explanation
Ans:
D
Question
The structure of a compound, G, is shown.
G is in the same homologous series as ethanoic acid.
Which row describes some of the properties of an aqueous solution of G?
Answer/Explanation
Ans:
C
Question
Which two compounds are molecules which both contain a double bond?
A ethane and ethanoic acid
B ethane and ethanol
C ethene and ethanoic acid
D ethene and ethanol
Answer/Explanation
Ans:C
Question
Which statement about ethanoic acid is correct?
A It fizzes with magnesium ribbon.
B It forms a salt with hydrochloric acid.
C It is a hydrocarbon.
D It forms a solution in water with a pH greater than pH7.
Answer/Explanation
Ans:A
Question
A compound has the formula CH3COOH.
What is not a property of this compound?
- It has a smell like vinegar.
- It reacts with acids to form salts.
- It reacts with magnesium to produce hydrogen.
- It turns blue litmus red.
Answer/Explanation
Ans:
B
Question:
The table shows bonds that are present and bonds that are not present in compound X.
What type of compound is X?
A a carboxylic acid
B an alcohol
C an alkane
D an alkene
Answer/Explanation
Ans: A
Question:
Which statement about aqueous ethanoic acid is not correct?
A It produces carbon dioxide when it reacts with magnesium carbonate.
B It produces hydrogen when it reacts with magnesium.
C It neutralises magnesium oxide.
D It turns red litmus paper blue.
Answer/Explanation
Ans: D
Question
The diagram shows a molecule of an organic compound W.
Which statement is not correct?
A A solution of W in water has a pH greater than pH 7.
B A solution of W in water reacts with sodium hydroxide solution.
C When copper(II) carbonate is added to a solution of W in water, a gas is produced.
D When magnesium is added to a solution of W in water, a gas is produced.
Answer/Explanation
Ans:A
Question
Which structure represents a compound that dissolves in water to form an acidic solution?
Answer/Explanation
Ans:D
Question
Which statements are correct for ethanoic acid?
1 It contains a carbon-oxygen double bond.
2 It contains two carbon atoms.
3 It decolourises bromine water.
4 It contains an –OH group.
A 1 and 2 only
B 1 and 3
C 1, 2 and 4
D 2, 3 and 4
Answer/Explanation
Ans: C
Question
The structure of a compound is shown.
Which functional groups are present in this compound?
Answer/Explanation
Ans: C