Self-test questions: Chapter 12

.

For a molecule containing one nitrogen atom, its molecular ion will have an odd mass number.

True

False

.

Chlorine produces a molecular isotope ratio of 50:50

True

False

.

Which of the following bonds will give the strongest IR absorption.

O–H

N–H

S–H

C–H

.

It is possible to distinguish between enantiomers by ¹H-NMR.

True

False

.

How many proton signals would 1-phenylethan-1-one have in its ¹H NMR spectrum.

4

8

5

6

.

By ¹H NMR spectroscopy, the expected signal intensity for the three lines of an triplet is 1:1:1.

True

False

.

Each degree of unsaturation confirms the presence of either a pi-bond or a ring structure. Based on this, select which of the following are true. Please select all that apply.

1 degree of unsaturation confirms either a double bond or a ring structure.

1 degree of unsaturation confirms a heteroatom.

4 degrees of unsaturation generally confirms a phenyl ring (three double bonds and a ring).

3 degrees of unsaturation generally confirms a phenyl ring (three double bonds and a ring).

Self-test questions: Chapter 12

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