Question 1

The diagram shows the structure of vitamin A.

How many chiral centres are present in one vitamin A molecule?

  A  

0

  B  

1

  C  

2

  D  

3

0

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1

Question 2

Fructose is a sugar with more than one chiral centre. The fructose molecule is shown with X, Y and Z indicating three carbon atoms.

Which carbon atoms are chiral centres?

  A  

X, Y and Z

  B  

X and Y only 

  C  

X only

  D  

Y only

0

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1

Question 3

Which compound is chiral?

  A  

1-chloro-3-methylbutane

  B  

2-chloro-2-methylbutane


  C  

2-chloro-3-methylbutane


  D  

3-chloropentane

0

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1

Question 4

Which compound exhibits both cis-trans and optical isomerism?

  A  

CH3CH=CHCH2CH3


  B  

CH3CHBrCH=CH2


  C  

CH3CBr=CBrCH3

  D  

CH3CH2CHBrCH=CHBr

0

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1

Question 5

What is the number of chiral carbon atoms in the steroid molecule below?

  A  

5

  B  

6

  C  

7

  D  

8

0

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1