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Organic Chemistry Review

Total questions: 60

Worksheet time: 2hrs 0mins

Name
Class
Date
1.
How many carbon atoms are in propane
a)
1
b)
2
c)
3
d)
4
2.
Name this alkane
a)
Methane
b)
Ethane
c)
Propane
d)
Butane
3.

What chemical is this? (C5H10)

a)

Pentene

b)

Pentane

c)

Hexane

d)

Heptene

4.
Give the name of this compound...
C3H8
a)
Propene
b)
Butane
c)
Butene
d)
Propane
5.
General formula of Alkane is 
a)
CnH2n+2
b)
CnH2n
c)
CnH2n+1OH
d)
CnH2n+1COOH
6.
Classify the compound based on the functional group present.
a)
alkane
b)
alkene
c)
alkyne
d)
aromatic
7.

Which of the following shows the structure of propene?

a)
b)
c)
d)
8.
If an alkane has 20 carbon atoms, how many hydrogen atoms will it have?
a)
20
b)
22
c)
40
d)
42
9.
What is the process of breaking down a long hydrocarbon into smaller hydrocarbons
a)
Cracking
b)
Fracking
c)
Combustion
d)
Oxidation
e)
Distillation
10.
When does incomplete combustion occur?
a)
Lack of oxygen
b)
Excess oxygen
c)
Depends
d)
Lack of fuel
11.
What are the products of complete combustion?
a)
SO2 + H2O
b)
H2O
c)
CO
d)
CO + H2O
e)
CO2 + H2O
12.

C5H12 + Br2 --> C5H11Br + HBr

This reaction is called____________________.

a)

Substitution

b)

Addition

c)

Cracking

d)

Combustion

13.

What is the name of this compound?

a)

ethanol

b)

ethanal

c)

ethanone

d)

methanal

14.

Which is the structures with IUPAC nomenclature


2,2,4-trimethylpentane

a)
b)
c)
d)
15.

Consider carbon compounds X to Z. Which of the following statements about these compounds are correct?

(1) They belong to the same homologous series.

(2) They have the same boiling point.

(3) All of them can decolourize acidified potassium permanganate solution.

a)

A. (1) and (2) only

b)

B. (1) and (3) only

c)

C. (2) and (3) only

d)

D. (1), (2) and (3)

16.

Alkene based polymers form through a process called _____ because an initiator causes a change in the DOUBLE BOND leaving a FREE RADICAL to react with the next monomer.

a)

condensation polymerization

b)

radical chain reaction

c)

substitution polymerization

d)

addition polymerization

17.

Which one of them 2,3-dimethyl-1-pentene

a)
b)
c)
d)
18.

In one of the reaction in alkanes brown color disappear when they react with .....

a)

chlorine

b)

bromine

c)

KMnO4

d)

Alcohols

19.
The following compounds have a molecular formula of
a)
CnH2n+2
b)
CH4
c)
C6H14
d)
CH3CH2CH2CH2CH2CH3
20.
As the number of carbons increases in an homologous series the melting point generally...
a)

increases

b)

decreases

c)

stays the same

d)
varies
21.
Which of the following will react with Br2(l)
a)
hexene 
b)
cyclohexane
c)
hexane
d)
alkanes
22.

What is the correct name for the following compound?

a)

3,4-dimethylheptane

b)

4-methyl-5-ethylhexane

c)

3-methyl-4-propylpentane

d)

4,5-dimethylheptane

23.

How many carbons are in the longest chain?

a)

7

b)

8

c)

9

d)

10

24.
Which formula represents an unsaturated hydrocarbon?
a)
A
b)
B
c)
C
d)
D
25.

What is the functional group for the carboxylic acids?

a)

Hydroxyl (-OH)

b)

Carbonyl (-CO)

c)

Carboxyl (-COOH)

d)

(C=C)

26.

What is the functional group for the alcohols?

a)

Hydroxyl (-OH)

b)

Carbonyl (-CO)

c)

Carboxyl (-COOH)

d)

(C=C)

27.

Molecules with the same molecular formula but different structural formula are known as

a)

A homologous series

b)

Isomers

c)

Isotopes

d)

Hydrocarbons

28.

What acid is vinegar made of?

a)

Hydrochloric Acid

b)

Ethanoic Acid

c)

Butanoic Acid

d)

Sulfuric Acid

29.

Which is the structures with IUPAC nomenclature


2,2,4-trimethylpentane

a)
b)
c)
d)
30.
How many carbons are in the longest chain of the following molecule:
a)
11
b)
10
c)
9
d)
8
31.
a)
2,3-dimethyl-4,4-diethyl heptane
b)
2,3-methyl-4,4-ethyl heptane
c)
4,4-ethyl-2,3-methyl heptane
d)
4,4-diethyl-2,3-dimethyl heptane
32.

Alkanes undergo substitution by chlorine only in the presence of

a)

UV light

b)

oxygen

c)

water

d)

aqueous bromine

33.

What is the condition for hydration of butene ?

a)

phosphoric acid, 60 atm, 300 0C

b)

Nickel or platinum, 180 oC

c)

1000atm, 200 oC

d)

room temperature

34.

Which of these statements are true about alkenes?

a)

They are unsaturated

b)

They have the general formula CnH2n

c)

They have a C=C

d)

They decolourise bromine water

35.

What are the products of incomplete combustion?

a)

Water

b)

Carbon dioxide

c)

Carbon monoxide

d)

Carbon

36.
a)
fermentation
b)
addition
c)
polymerization
d)
combustion
37.
a)

hydration

b)

addition

c)

polymerization

d)

fermentation

38.
a)
fermentation
b)
polymerization
c)
esterification
d)
saponification
39.
a)
addition
b)
polymerization
c)
esterification
d)
fermentation
40.
a)
fermentation
b)
combustion
c)
saponification
d)
substitution
41.
a)
fermentation
b)
combustion
c)
addition
d)
polymerization
42.

Carboxylic acids are produced by the oxidation of....

a)

Alcohols

b)

Alkenes

c)

Alkanes

d)

Ketones

43.

Esterification is an example of a...

a)

A condensation reaction

b)

An addition reaction

c)

A subtraction reaction

d)

An evaporation reaction

44.

The following equation represents the preparation of ethanol in industry.

What is the process?

a)

Oxidation

b)

Hydration

c)

Fermentation

d)

Hydrogenation

45.

Select all of these following that are methods to make ethanol.

a)

Dehydration of ethene

b)

Addition of water to ethene

c)

Fermentation of sugars with yeast

d)

Distillation of sugars

46.

Ethanol is produced by fermentation.

Which of the following conditions is not required to produce ethanol by fermentation?

a)

Temperature between 30-35 C

b)

Yeast

c)

Presence of Oxygen

d)

Sugar or starch dissolved in water

47.

In the fractional distillation of crude oil, where is the hottest part of the fractionating column?

a)

top of the tower

b)

middle of the tower

c)

bottom of the tower

48.

C5H10 + Br2 --> C5H10Br

This reaction is called____________________.

a)

Halogenation

b)

Addition

c)

Cracking

d)

Combustion

49.

What is the process of breaking down a long hydrocarbon into smaller hydrocarbons?

a)

Cracking

b)

Fracking

c)

Combustion

d)

Distillation

50.

What is the colour change when an alkene reacts with bromine water?

a)

Turns clear

b)

Turns orange

c)

From colorless to orange

d)

From orange to colorless

51.

A petrochemical molecule undergoes the chemical change shown. What is the chemical change?

a)

cracking

b)

polymerisation

c)

fractional distillation

d)

reduction

52.

What conditions are needed for cracking?

a)

high temperature

b)

high pressure

c)

catalyst

d)

low temperature

53.

Why is CRACKING useful?

a)

It produces short chain alkanes and alkenes, which are more useful than long alkanes

b)

It produces longer alkanes which are the most useful hydrocarbons

c)

It uses up the alkenes for which there is only a low demand

d)

There is a greater demand for long chain alkanes than can be met by crude oil only

54.

Consider carbon compounds X to Z. Which of the following statements about these compounds are correct?

(1) They belong to the same homologous series.

(2) They have the same boiling point.

(3) All of them can decolourize acidified potassium permanganate solution.

a)

A. (1) and (2) only

b)

B. (1) and (3) only

c)

C. (2) and (3) only

d)

D. (1), (2) and (3)

55.

What is the name of the addition polymer?

a)

poly(ethene)

b)

poly(propene)

c)

poly(butene)

56.

What is the name of the addition polymer?

a)

poly(phenylethene)

b)

poly(phenylamine)

c)

poly(benzene)

57.

What is the name of the addition polymer?

a)

poly(fluoroethene)

b)

poly(difluoroethene)

c)

poly(tetrafluoroethene)

58.

Identify the polymer made from these monomer(s)

a)
b)
59.

Identify the polymer made from these monomer(s)

a)
b)
60.

True of false - this is the repeat unit for poly(propene)?

a)

True

b)

False

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