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Essential Chemistry for IGCSE - The Variety Of Organic Chemicals (Section 3)

1
What is the other product of the reaction between ethanol and sodium metal?
Answer
(B)
Hydrogen
2
Which of the following are used in the production of biofuels?
Answer
A
B
3
What is a typical product of the reaction between ethanoic acid and a base?
Answer
(C)
A salt
4
Which of the following factors influences the boiling point of alkanes?
Answer
A
C
5
Which of the following is a chemical property of carboxylic acids?
Answer
A
B
D
6
Which of the following factors influences the boiling point of a series of alkanes?
Answer
(B)
The number of carbon atoms in the molecule
7
What is the product formed when an alkene reacts with steam in the presence of a catalyst?
Answer
(B)
An alcohol
8
What are the requirements for the reaction of an alkane with a halogen (such as chlorine)?
Answer
(C)
UV light
9
What type of reaction occurs when a carboxylic acid reacts with an alcohol?
Answer
(A)
Esterification
10
During the cracking process, what other types of products, besides shorter alkanes, are typically produced?
Answer
(C)
Alkenes
11
Which of the following statements correctly describes the reaction between an alcohol and ethanoic acid?
Answer
(B)
It is a condensation reaction forming an ester and water.
12
What type of intermolecular forces are primarily responsible for the physical properties of alkanes?
Answer
(C)
London dispersion forces
13
What is the name given to the product formed when a carboxylic acid reacts with an alcohol?
Answer
(B)
Ester
14
Which of the following statements is true concerning the reaction of alkanes with chlorine in the presence of sunlight?
Answer
A
B
15
What is the primary role of a catalyst in the production of ethanol from ethene and steam?
Answer
(D)
To lower the activation energy of the reaction.
16
Which of the following will react with carboxylic acids?
Answer
(A)
Alcohols
17
Which of the following is the main requirement for the reaction between an alkane and chlorine in sunlight?
Answer
(C)
UV light
18
Which of the following will react with ethanoic acid?
Answer
A
B
19
What happens to bromine water when added to an alkene?
Answer
(A)
It decolorizes.
20
What type of reaction is the formation of an ester from a carboxylic acid and an alcohol?
Answer
(C)
Esterification
21
What are the main reactants in the esterification reaction?
Answer
(A)
An alcohol and a carboxylic acid.
22
What are the main products formed during the complete combustion of ethanol?
Answer
A
B
23
Which of the following conditions are required for cracking to take place?
Answer
A
C
24
Which of the following reactions can produce an ester?
Answer
(A)
Reaction between a carboxylic acid and an alcohol.
25
Which of the following statements is/are true about the reaction of ethanoic acid with sodium carbonate?
Answer
A
C
D
26
What is the reaction of an alkane with chlorine under UV light an example of?
Answer
(B)
Substitution
27
What happens when a carboxylic acid reacts with a base (e.g. sodium hydroxide)?
Answer
(B)
Salt and water are produced.
28
Which of the following is the product of the reaction between ethanol and acidified potassium dichromate?
Answer
(C)
Ethanoic acid
29
What is a catalyst in cracking?
Answer
(B)
A substance that increases the rate of a chemical reaction without being consumed in the process.
30
What are the products of a reaction between a carboxylic acid and a metal?
Answer
(A)
Salt and hydrogen
31
Which of the following statements is true about alkenes?
Answer
(C)
Alkenes readily undergo addition reactions.
32
What type of reaction is the conversion of ethanol to ethanoic acid?
Answer
(A)
Oxidation
33
Which compound class typically reacts with metals to release hydrogen gas?
Answer
(D)
Carboxylic acids
34
Which of the following compounds would be produced during incomplete combustion of an alkane?
Answer
B
D
35
What type of reaction is the burning of an alkane?
Answer
(C)
Combustion
36
What happens to the bromine water when added to an alkene?
Answer
(B)
It turns colorless.
37
Which of the following is a characteristic of an alkene?
Answer
(C)
They undergo addition reactions.
38
What happens when a carboxylic acid reacts with a metal carbonate?
Answer
(B)
Salt, carbon dioxide, and water are produced.
39
What type of reactions do alkenes primarily undergo?
Answer
(B)
Addition reactions
40
What is the primary purpose of cracking alkanes?
Answer
(B)
To convert long-chain alkanes into shorter, more useful hydrocarbons.
41
Which of the following is a characteristic of the homologous series of carboxylic acids?
Answer
(C)
They all contain the -COOH functional group.
42
Which of the following reactions will produce an ester?
Answer
(B)
Reaction of an alcohol with a carboxylic acid.
43
What is the general formula for the alkanes?
Answer
(B)
CnH2n+2
44
Which of the following conditions are needed for cracking alkanes?
Answer
A
C
45
What type of bonds are found in saturated hydrocarbons?
Answer
(A)
Single bonds only
46
What type of reaction do alkenes typically undergo?
Answer
(B)
Addition
47
Which of the following statements is true about cracking?
Answer
A
B
C
48
Which of the following substances will react with sodium hydroxide?
Answer
(A)
Ethanoic acid
49
What is the role of a catalyst in cracking?
Answer
A
C
50
Which two conditions are necessary for the cracking process?
Answer
A
C