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Organic Chemistry

Total questions: 60

Worksheet time: 30mins

Name
Class
Date
1.

What happen when bromine water is added to butene?

a)

After shaking, the colour change to colourless

b)

After shaking, the colour change to brown

c)

After shaking, it will stay the same

d)

After shaking, it will release gas

2.
How many carbon atoms are in methane?
a)
1
b)
2
c)
3
d)
4
3.
How many carbon atoms are in propane
a)
1
b)
2
c)
3
d)
4
4.
If an alkane has 20 carbon atoms, how many hydrogen atoms will it have?
a)
20
b)
22
c)
40
d)
42
5.
Alkanes are known as saturated hydrocarbons because they contain only carbon-hydrogen single bonds.
a)
True
b)
False
6.
Melting and boiling points of alkanes
a)
increase with the number of carbon atoms in the chain
b)
decrease with the number of carbon atoms in the chain
c)
increase with branching
d)
are determined by the bonding between the carbons and hydrogens
7.
The volatility points of alkanes
a)
increase with the number of carbon atoms in the chain
b)
decrease with the number of carbon atoms in the chain
c)
increase with branching
d)
are determined by the bonding between the carbons and hydrogens
8.
What is the correct general formula of the alkanes?
a)
CnH2n + 2
b)
C2nH2n + 2
c)
CnH2n 
d)
C2nHn + 2
9.
What is the general formula of an alkene
a)
2n+2
b)
CnH2n+2
c)
CnH2n
d)
CnHn
10.
What is the exam definition of saturated?
a)
No single bonds
b)
Contains a double bond
c)
No single bonds, all double bonds
d)
No double bonds, all single bonds
11.
In fractional distillation, longer length hydrocarbons are found where in the distillation column?
a)
Top
b)
Bottom
12.
Crude oil is refined through:
a)
charcoal filtration
b)
fractional distillation
c)
sand filtration
d)
melting point purification
13.
The highest temperature in a fractional distillation column is found:
a)
at the bottom
b)
at the top
c)
in the middle
14.
What physical property allows Distillation to separate different molecules?
a)
a) Melting point
b)
b) Boiling point
c)
c) Diffusion rate
d)
d) Condensation rate
15.
What does the viscosity of a hydrocarbon tell you?
a)
How easily it flows
b)
How easily it sets alight
c)
What its boiling point is
d)
How long the hydrocarbon is
16.
What happens when crude oil is fractional distilled?
a)
Different fractions are mixed together to form oil.
b)
Sulfur is removed from the crude oil.
c)
The oil is separated into fractions of different boiling ranges by heating.
d)
Longer chain fractions are broken down into shorter chain fractions.
17.

Where in the fractionating column are shorter chain hydrocarbon molecules obtained?

a)

At the top

b)

At the bottom

18.

Molecules collected at the top of the fractionating column tend to be...

a)

more viscous, less flammable and less volatile

b)

less viscous, more flammable and more volatile

c)

more viscous, more flammable and less volatile

d)

less viscous, less flammable and more volatile

19.
What is kerosene used for?
a)
Fuel for ships
b)
Fuel for lorries
c)
Fuel for airplanes
d)
Making roads
20.
How long does it take crude oil to form?
a)
hundreds of years
b)
thousands of years
c)
millions of years
d)
billions of years
21.

What is a monomer?

a)

Many molecules that can undergo polymerisation

b)

A single molecule that can undergo polymerisation

c)

A type of polymer

d)

A fraction

22.

What is the correct name of a polymer made of ethene?

a)

(Poly)ethene

b)

poly(ethene)

c)

poly(chloroethene)

d)

ethene

23.
Large molecules made of Hydrogen and Carbon
a)
plastic
b)
vulcanization
c)
hydrocarbon
d)
organic
24.
The functional group of the monomer react to bond each other and produce water.
a)
condensation
b)
thermosetting
c)
copolymer
d)
addition
25.
What polymer does this shorthand formula represent?
a)
PVC
b)
Polypropene
c)
DNA
d)
Polyethene
26.

Name this compound...

a)

methane

b)

methene

c)

methanol

d)

methoxymethane

27.

Ethene is reacted with what other compound to create ethanol

a)

Alcohol

b)

Water (Vapour/Steam)

c)

Ethane

d)

Propanol

28.

Which process can be used to form alcohol?

a)

Fermentation

b)

Combustion

c)

Cracking

d)

Polymerisation

29.

Ethanol can be used as (Select Two)

a)

Solvent

b)

Drink

c)

Paint

d)

Fuel

30.

The complete combustion of ethanol creates which two products...

a)

Ethene

b)

Water

c)

Carbon Dioxide

d)

Methane

31.

During the fermentation of sugar what is essential

a)

Ethene

b)

Sugar

c)

Water

d)

Yeast

32.

The correct formula for ethanol is

a)

C2H4OH

b)

C2H5OH

c)

C2H5OH

d)

C2H6OH

33.
If decane underwent cracking, it would produce pentane, propene and which other monomer?
a)
Ethene
b)
Propene
c)
Butene
d)
Pentene
34.
Cracking.....
a)
Breaks larger hydrocarbons into smaller hydrocarbons
b)
Separates hydrocarbons based on their length
c)
Detects alkenes
35.

Breaking up long chain alkanes into alkenes and shorter chain alkenes is called...

a)

Fractional distillation

b)

Cracking

c)

Distillation

d)

Catalysis

36.

What is the characteristic functional group of carboxylic acids?

a)

Carbonyl

b)

Hydroxyl

c)

Carbon

d)

Carboxyl

37.

Is the carboxyl carbon always carbon number 1?

a)

Yes

b)

No

38.

What is the suffix for carboxylic acids?

a)

-ic acid

b)

-oic

c)

-oic acid

39.
name this:
HCOOH
a)
methanol
b)
methanoic acid
c)
methyl methanoate
40.
The reaction between HCOOH and CH3COOH produces an ester called methyl methanoate.
a)
True
b)
False
41.
name this diagram:
a)
ethanol
b)
ethanoic acid
c)
methyl methanoate
42.

The products of the reaction of a carboxylic acid and an alcohol would be

a)

Ketone and water

b)

Amide and water

c)

Acid chloride and water

d)

Ester and water

43.
Carboxylic acid is a weak acid because....
a)
it fully ionises in solution
b)
it partially ionises in solution
44.

Classify the class of compound based on the functional group present.

a)

aldehyde

b)

ketone

c)

alcohol

d)

carboxylic acid

45.
How is a Carboxyl Group commonly written?
a)
-OH
b)
 -COOH
c)
-COH
d)
-CHOH
46.

What is the general formula for carboxylic acid?

a)

CnH2n

b)

CnH2nO

c)

CnH2n+1COOH

d)

CnH2n+1OH

47.

Name this carboxylic acid

a)

ethanoic acid

b)

prpoanoic acid

c)

butyl butanoate

d)

butanoic acid

48.
What is the functional group shown?
a)
Alcohol
b)
Carboxylic Acid
c)
Ester
49.
butan-1-ol  + propanoic acid in the presence of sulfuric acid gives
a)
butyl propanoate
b)
propyl buntanoate
c)
heptanote
50.

Esters are known for......

a)

the bright colours

b)

flammability

c)

exploding

d)

fruity smell

51.

What are alkanes?

a)

Unsaturated Hydrocarbons

b)

Compound containing a hydroxyl group

c)

Saturated atom containing hydrogen and carbon only

d)

Saturated Hydrocarbons

52.

Through which process would you separate crude oil?

a)

Catalytic Cracking

b)

Fractional Distillation

c)

Thermal Cracking

d)

Steam Distillation

e)

Primary Distillation

53.

A compound has the structure as shown:


Which of the following statements about this compound are correct?

(1) It can decolorize bromine water.

(2) It can be polymerized.

(3) It can burn in air.

a)

(1) & (2) only

b)

(1) & (3) only

c)

(2) & (3) only

d)

(1), (2) & (3)

54.
Name the compound
a)
Ethane
b)
Ethene
c)
Ethyne
55.
What is the prefix for four carbons?
a)
meth-
b)
but-
c)
prop-
d)
eth-
56.

Give the name of this compound...

C3H8

a)

Propene

b)

Butyne

c)

Butene

d)

Propane

57.
How does the temperature change from top to bottom?
a)
Increases
b)
Decreases
c)
It does not change
d)
Cannot be determined
58.
At which pipe: M or N are larger hydrocarbons collected?
a)
M
b)
N
59.

What is a functional group?

a)

Group of atoms that give specific characteristics to a molecule

b)

Group of molecules that make up a group of atoms

c)

Group of molecules that give specific characteristics to an atom

d)

Group of atoms that give specific characteristics to an element

60.

Which are features of successive members of a homologous series?

I. Similar chemical properties

II. Same general formula

III. Differ by −CH2−

a)

I and II only

b)

I and III only

c)

II and III only

d)

I, II and III

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