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Organic chemistry open practice

Last updated about 1 year ago

54 questions

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Question 1

1.

Which of the following descriptions most accurately explains what a hydrocarbon is?

An organic compound containing only hydrogen and carbon atoms

An organic compound with a unique functional group and formula

An organic compound with one or more double bonds between carbons.

An organic compound with single bonds between carbons

Question 2

2.

An organic molecule with the prefix "pent-", consists of ....

5 atoms

molecules in the shape of a pentagon

5 carbon atoms

5 double bonds

Question 3

3.

Which of the following is NOT a homologous series?

hydroxyl

alkane

carboxylic acid

alcohol

Question 4

4.

Which one of the following describes a structural formula?

A formula showing the simplest ratio of atoms in a molecule

Shows the way atoms are bonded together without showing all the bonds.

A formula showing all the atoms and their relative positions as well as all the bonds they make with adjacent atoms

The formula showing the numbers of each kind of element.

Question 5

5.

A carboxyl group is an example of a .....

Functional group

Molecule

Polyatomic ion

Homologous series

Question 6

6.

Provide the IUPAC name of the following molecule:

Question 7

7.

Provide the IUPAC name of the following molecule:

Question 8

8.

Provide the IUPAC name of the following molecule:

Question 9

9.

Provide the IUPAC name of the following molecule:

Question 10

10.

Select the terms which identifies a functional group.

alkene

double bond

alkane

single bonds

Question 11

11.

Chloroform was used as an anaesthetic in surgery many years ago. Today it's a popular choice for kidnappers 😳. Its IUPAC name is trichloromethane.

Write its molecular formula using the MATHS keyboard (click on the keyboard icon in the answer line) to subscript the numbers.

Question 12

12.

Provide the IUPAC name of the following molecule:

Question 13

13.

Provide the IUPAC name of the following molecule. Please check spelling!

Question 14

14.

Provide the IUPAC name of the following molecule:

Question 15

15.

Provide the IUPAC name of the following molecule:

Question 16

16.

Which of the following is 3-methylpentan-2-ol?

Question 17

17.

Which of the following is 2,2-dimethylpropan-1-ol?

Question 18

18.

Provide the IUPAC name of the following molecule.

Question 19

19.

Provide the IUPAC name of the following molecule:

Question 20

20.

To which homologous series does this compound belong?

Question 21

21.

The molecule drawn below is a chain isomer of which one of the following molecules?

ethylethanoic acid

2-methylbutanoic acid

butanoic acid

methylpropanoic acid

Question 22

22.

Write the molecular formula of this compound using the MATHS keyboard to subscript the numbers.

Question 23

23.

What is the IUPAC name for the following compound?

Question 24

24.

A carboxyl group is a combination of which TWO functional groups?

carbonyl

amide

hydroxide

hydroxyl

Question 25

25.

Write the condensed structural formula for the following organic molecule using the maths keyboard to subscript the numbers.

Question 26

26.

Which one of the following molecules is an ester?

Question 27

27.

Provide the IUPAC name of the following molecule:

Question 28

28.

Provide the name of the alcohol that was used to make the following ester:

Question 29

29.

Provide the name of the carboxylic acid that was used to make the following ester:

Question 30

30.

Which molecule is a structural isomer of this molecule?

none of these are isomers

Question 31

31.

Which of the following statements would apply to organic compounds that belong to the same homologous series?

I They have the same boiling points
II They have the same funtional group
III They have the same molecular formula

II and III only

I, II and III

I and II only

II only

Question 32

32.

Provide the IUPAC name of compound A:

Question 33

33.

Name the homologous series to which compound B belongs:

Question 34

34.

Provide the IUPAC name of compound B:

Question 35

35.

Provide the IUPAC name of an UNBRANCHED ISOMER of compound B.

Question 36

36.

Name the functional group in this molecule:

pentan-2-ol

Question 37

37.

Write the IUPAC name of a POSITIONAL ISOMER of this molecule:

pentan-2-ol

Question 38

38.

Write the IUPAC name of this molecule:

CH2CHCH2CH2CH3

Question 39

39.

Is this molecule saturated or unsaturated?

CH2CHCH2CH2CH3

saturated

unsaturated

Question 40

40.

The structural formula of an organic compound found in pears, raspberries and pineapples is given below:
Provide its IUPAC name.

Question 41

41.

The structural formula of an organic compound found in pears, raspberries and pineapples is given below:
Provide the homologous series

Question 42

42.

The structural formula of an organic compound found in pears, raspberries and pineapples is given below:
Provide the IUPAC name of the organic acid used to make this compound.

Question 43

43.

The structural formula of an organic compound found in pears, raspberries and pineapples is given below:
Provide the IUPAC name of a POSITIONAL ISOMER of this compound.

Question 44

44.

The structural formula of an organic compound found in pears, raspberries and pineapples is given below:
Provide the IUPAC name of a FUNCTIONAL ISOMER of this compound.

Question 45

45.

Write the IUPAC name of the following compound:

CH2CH3
|
CH3 - C - CH3
|
CH3

Question 46

46.

What is an atom or group of atoms that forms the centre of chemical reactivity in an organic compound called?

isomer

homologous series

reactivity core

functional group

Question 47

47.

Write the IUPAC name of the following compound:

Question 48

48.

Name the homologous series to which this compound belongs:

Question 49

49.

Which of these compounds is a saturated hydrocarbon?

ethyl butanoate

ethane

Question 50

50.

Which of these compounds is an alcohol?

ethane

ethyl butanoate

Question 51

51.

Which of these compounds is an ester?

ethane

ethyl butanoate

Question 52

52.

Write the general formula of the homologous series to which ethane belongs. Use the maths keyboard to subscript.

Question 53

53.

Write the IUPAC name of this compound:

Question 54

54.

Write the condensed structural formula for this compound, using the maths keyboard to subscript.