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Essential Chemistry for IGCSE - Organic Chemistry And Petrochemicals (Section 4)

1
What is the key difference between a saturated and an unsaturated hydrocarbon?
Answer
(A)
Saturated hydrocarbons contain only single bonds; unsaturated hydrocarbons contain at least one double or triple bond.
2
Which of the following statements is TRUE regarding the products of combustion of a hydrocarbon?
Answer
(B)
The complete combustion produces only carbon dioxide and water.
3
What type of bond is present in alkanes?
Answer
(A)
Single
4
Which of the following hydrocarbons would have the highest boiling point?
Answer
(D)
Butane
5
Which of the following statements is/are TRUE about the fractions obtained during fractional distillation?
Answer
A
B
D
6
What type of hydrocarbons are alkenes?
Answer
(C)
Unsaturated hydrocarbons with at least one double bond.
7
What does the term "cracking" mean in the context of organic chemistry?
Answer
(B)
The process of breaking down long-chain hydrocarbons into shorter ones.
8
What is an alkyl group?
Answer
(B)
A saturated hydrocarbon group.
9
Which of the following is a product of incomplete combustion of a hydrocarbon fuel?
Answer
(C)
Carbon monoxide
10
Which of the following is the correct definition of a hydrocarbon?
Answer
(B)
A compound containing only carbon and hydrogen atoms.