25.1.3 Isomers

Question 1

Which statement about isomers is not correct?

Answer 1

Isomers can have the same connectivities, different shapes, and different molecular formulas.

Question 2

Which statement about isomers is not correct?

Answer 2

An achiral molecule cannot be a stereoisomer.

Question 3

Look at the two pairs of alkene isomers. Which statement about these isomers is not correct?

Answer 3

1-butene and 2-butene are enantiomers.

Question 4

Figure 2 is a shorthand version of Figure 1. Both figures represent thalidomide. Which statement about these figures is not correct?

Answer 4

Any bonds that are missing can be assumed to be double bonds between C and H.

Question 5

Constitutional isomers _________________

Answer 5

are isomers that differ in their connectivity, or the way in which the ligands are connected.

Question 6

Which statement about the two pentane isomers is not correct?

Answer 6

The two isomers are stereoisomers.

Question 7

Which statement about stereoisomers is not correct?

Answer 7

Stereoisomers have different connectivities.

Question 8

Which statement about enantiomers is not correct?

Answer 8

Enantiomers are superimposable.

Question 9

Which statement about isomers is not correct?

Answer 9

Isomers have similar structures (or shapes).

Question 10

Which statement about the molecule below is not correct?

Answer 10

The molecule is achiral.