Page 26 - Q & A STPM 2022 Chemistry

Chapter
Chemistry Term 3 STPM Chapter 14 Introduction to Organic Chemistry
14 Introduction to Organic

Chemistry

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14.1 Bonding of the Carbon Atoms: The Shapes of Ethane, Ethene, Ethyne
and Benzene Molecules

Section A Multiple-choice Questions

Question 1
Which of the following combinations is correct?
Molecule Type of hybridisation of the carbon atom(s)
A CH 3CH 2CH 3 s p
2
B CH 3 !CH"CH 2 sp
3
C C 6H 6 sp and sp 2
D CH 3 !C#CH sp and sp
3

Answer: D
There are only three types of hybridisation involving the s and p orbitals: sp,
sp and sp .
3
2
Type of carbon-carbon bond Hybridisation
Single, C!C sp 3
Double, C"C sp 2
Triple, C#C sp

Molecule Type of hybridisation of carbon atom(s)
sp 3
CH 3 CH 2 CH 3
sp and sp 2
3
CH 3 !CH"CH 2
Term
3 C 6 H 6 sp 2
CH 3 !C#CH sp and sp
3

342

14 Q&A STPM Chem T3 Layout.indd 342 4/19/19 5:29 PM