1.
The simplest alkane is:
A
Ethane
B
Methane
C
Propane
D
Butane
2.
Which functional group is present in alcohols?
A
–COOH
B
–NH₂
C
–OH
D
–CHO
3.
Julia is studying functional groups. She learns that functional groups determine chemical reactivity. What functional group is present in carboxylic acids?
A
-OH
B
-COOH
C
-CHO
D
-CO-
4.
Which compound belongs to organic chemistry?
A
NaOH
B
H₂SO₄
C
C₂H₅OH
D
NaCl
5.
Tina is studying functional groups of alcohols. She learns that the hydroxyl group (-OH) is characteristic of alcohols. What is the name of the simplest alcohol?
A
Ethanol
B
Methanol
C
Propanol
D
Butanol
6.
Mohamed is learning about straight chain and branched chain compounds. He knows that straight chain compounds have no branches. Which of the following is a straight chain compound?
A
Isobutane
B
Isopentane
C
n-Pentane
D
Neopentane
7.
Hina is studying the classification of organic compounds. She learns that compounds can be classified as acyclic or cyclic. Which of the following is a cyclic compound?
A
Butane
B
Cyclopentane
C
Pentane
D
Hexane
8.
Which of the following is an organic compound?
9.
Which functional group is present in carboxylic acids?
A
–OH
B
–NH₂
C
–COOH
D
–CHO
10.
Alkanes are hydrocarbons having:
A
Double bonds
B
Triple bonds
C
Only single bonds
D
Aromatic rings
11.
Bilal is studying homologous series. He learns that a homologous series is a group of compounds with similar properties and a general formula. Which of the following is a characteristic of a homologous series?
A
Different functional groups
B
Same general formula and successive members differ by CH2
C
Different chemical properties
D
No pattern in physical properties
12.
Which compound contains only single bonds?
A
Ethene
B
Ethyne
C
Ethane
D
Benzene
13.
Ethan is learning about alkanes. He knows that alkanes are generally unreactive. What is the main use of alkanes?
A
As solvents
B
As fuels
C
As fertilizers
D
As preservatives
14.
Vera is studying the functional group of aldehydes. She learns that aldehydes contain a carbonyl group bonded to a hydrogen. What is the general formula for aldehydes?
A
RCHO
B
RCOR
C
RCOOH
D
ROH
15.
Alkynes are hydrocarbons containing:
A
Single bonds
B
Double bonds
C
Triple bonds
D
Ionic bonds
16.
Which compound is commonly used as cooking gas?
A
Methane
B
Ethene
C
Ethyne
D
Benzene
17.
Ethene belongs to which class?
A
Alkane
B
Alkene
C
Alkyne
D
Carboxylic acid
18.
Diana is studying saturated and unsaturated hydrocarbons. She learns that unsaturated hydrocarbons contain multiple bonds. Which of the following is an unsaturated hydrocarbon?
A
Methane
B
Ethene
C
Propane
D
Butane
19.
Which class of compounds contains only carbon and hydrogen?
A
Alcohols
B
Carboxylic acids
C
Hydrocarbons
D
Amines
20.
Ibrahim is learning about heterocyclic compounds. He understands that heterocyclic compounds contain atoms other than carbon in the ring. Which of the following is a heterocyclic compound?
A
Cyclohexane
B
Furan
C
Benzene
D
Cyclobutane
21.
Fatima is studying alkenes. She learns that alkenes are more reactive than alkanes. What is the reason for their higher reactivity?
A
Presence of single bonds
B
Presence of double bonds
C
Presence of triple bonds
D
Presence of rings
22.
Yara is learning about ethers. She understands that ethers have an oxygen atom connected to two carbon groups. Which of the following is an ether?
A
Diethyl ether
B
Ethanol
C
Acetone
D
Acetic acid
23.
Ibrahim is learning about alkynes. He understands that alkynes contain triple bonds. Which of the following is an alkyne?
A
Ethene
B
Ethyne
C
Propane
D
Butene
24.
Which organic compound is used in alcoholic drinks?
A
Methanol
B
Ethanol
C
Propanol
D
Butanol
25.
Xia is studying aldehydes and ketones. She learns that aldehydes contain a carbonyl group at the end of a carbon chain. Which of the following is an aldehyde?
A
Acetone
B
Acetaldehyde
C
Ethanol
D
Acetic acid
26.
Which compound is used to make plastics?
A
Ethane
B
Ethene
C
Methane
D
Propane
27.
General formula of alkanes is:
A
CnH2n
B
CnH2n−2
C
CnH2n+2
D
CnHn
28.
Waleed is learning about esters. He understands that esters are formed from carboxylic acids and alcohols. Which of the following is an ester?
A
Ethyl acetate
B
Ethanol
C
Acetic acid
D
Acetone
29.
Khalid is learning about haloalkanes. He knows that haloalkanes are used as refrigerants. Which of the following was commonly used as a refrigerant?
A
Chlorofluorocarbons (CFCs)
B
Ethanol
C
Acetic acid
D
Acetone
30.
Rania is studying the uses of organic compounds. She learns that many synthetic materials are organic. Which of the following is a synthetic organic compound?
A
Cotton
B
Nylon
C
Wool
D
Silk