Essential Chemistry for IGCSE - The Variety Of Organic Chemicals (Section 4)
1
Which of the following is the structural formula of ethanol?
Answer
(B)
CH3CH2OH
2
Which of the following is NOT a use of ethanol?
Answer
(D)
A catalyst
3
What is the name of the process where an alcohol reacts with a carboxylic acid?
Answer
(B)
Esterification
4
What is the major product of the reaction of ethanol with acidified potassium dichromate(VI)?
Answer
(D)
Ethanoic acid
5
What type of reaction is the addition of bromine to an alkene?
Answer
(A)
Addition
6
What are the products of the reaction between ethanol and oxygen (combustion)?
Answer
(A)
Carbon dioxide and water
7
What is the key difference between an alkane and an alkene?
Answer
(B)
Alkenes have a carbon-carbon double bond.
8
Which products are formed when ethanoic acid is reacted with sodium hydroxide?
Answer
A
B
9
Which of the following is the general formula for alkenes?
Answer
(B)
CnH2n
10
Which of the following correctly describes the bonding in alkanes?
Answer
(C)
Single covalent bonds between carbon atoms and hydrogen atoms.
11
What is the functional group of carboxylic acids?
Answer
(C)
-COOH
12
Which of the following statements are true regarding the reaction of alkanes with chlorine in the presence of light?
Answer
A
B
D
13
Which of the following is produced when carboxylic acids react with bases?
Answer
(A)
A salt and water.
14
Which of the following describes the process of cracking?
Answer
(B)
Breaking down long-chain alkanes into smaller molecules.
15
Which of the following statements is true about alkenes?
Answer
(C)
They contain a carbon-carbon double bond.
16
Which of the following will react with ethanoic acid?
Answer
A
B
17
What is a major use for ethene?
Answer
(B)
Making polymers (plastics)
18
Which of the following processes is used to break down large hydrocarbon molecules?
Answer
(B)
Cracking
19
What is the correct name for CH3CH2CH2CH2CH3?
Answer
(D)
Pentane
20
What type of reaction do alkenes primarily undergo?
Answer
(B)
Addition
21
What are the two main conditions required for cracking?
Answer
(A)
High temperature and a catalyst
22
Which type of compounds can undergo addition reactions?
Answer
(B)
Alkenes
23
What type of bonds are broken during the cracking of alkanes?
Answer
(C)
Both carbon-carbon and carbon-hydrogen bonds
24
What is a saturated hydrocarbon?
Answer
(C)
A hydrocarbon that contains only single bonds.
25
Which of the following substances can undergo addition reactions?
Answer
(B)
Ethene
26
What type of bonds are present in alkanes?
Answer
(A)
Single bonds
27
Which functional group is present in alcohols?
Answer
(B)
-OH
28
Which of the following is a product of the reaction of an alcohol with an organic acid (carboxylic acid)?
Answer
(A)
An ester
29
Which of the following are considered saturated hydrocarbons?
Answer
(C)
Alkanes
30
What type of hydrocarbon is generally represented by the formula CnH2n?
Answer
(B)
Alkenes
31
What are the products of the reaction between ethanoic acid and sodium hydroxide?
Answer
(B)
Sodium ethanoate and water.
32
What are the conditions required for the reaction between an alkane and chlorine?
Answer
(B)
UV light
33
Which of the following is a characteristic of carboxylic acids?
Answer
(C)
They contain the -COOH group.
34
Which of the following will react with a solution of sodium hydroxide?
Answer
(A)
Ethanoic acid
35
Which of the following will undergo addition reactions?
Answer
(B)
Ethene
36
What is the primary difference between saturated and unsaturated hydrocarbons?
Answer
(A)
Saturated hydrocarbons contain only carbon-carbon single bonds, while unsaturated hydrocarbons contain at least one carbon-carbon double or triple bond.
37
What would be the major product of the reaction between ethene and water in presence of an acid catalyst?
Answer
(B)
Ethanol
38
What is the formula for the functional group of an alcohol?
Answer
(C)
-OH
39
Which of the following statements is true about alkanes?
Answer
A
C
40
Which of the following correctly represents the general formula for an alcohol?
Answer
(C)
CnH2n+1OH
41
What is the process by which alkenes are converted to alkanes?
Answer
(B)
Hydrogenation
42
What does ethanoic acid react with to form salt, carbon dioxide and water?
Answer
(C)
A metal carbonate
43
Which of the following will react with a metal to produce hydrogen gas?
Answer
(B)
Ethanoic acid
44
Which of the following processes converts an alkene into an alkane?
Answer
(C)
Hydrogenation
45
What is a characteristic property of ethanoic acid?
Answer
(B)
It reacts with metals to produce hydrogen gas.
46
Which of the following statements about alkenes is correct?
Answer
(C)
They react by addition reactions.
47
Which of the following compounds are produced during the incomplete combustion of alkanes?
Answer
B
D
48
Which of the following is a product of the reaction of an alkene with steam in the presence of a catalyst?
Answer
(B)
An alcohol
49
Which functional group is characteristic of alkenes?
