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HYDROCARBONS

Total questions: 20

Worksheet time: 11mins

Name
Class
Date
1.
Hydrocarbons are compounds that contain
a)
  Carbon and Nitrogen
b)
Carbon and Hydrogen 
c)
  Carbon, and Oxygen
d)
Carbon, Oxygen, and  Hydrogen 
2.
All alkanes are soluble in water
a)
true
b)
false
c)
depends on the number of carbons and branching
d)
depends of the temperature
3.
As the number of carbons increases in an homologous series the melting point generally...
a)
increase
b)
decrease
c)
stay the same
d)
varies
4.
Which of the following undergoes addition reactions
a)
alkanes
b)
alkanes and alkenes
c)
alkanes and alkynes
d)
alkenes
5.

If an alkene reacts with a halogen, it is known as what type of reaction?

a)

Addition

b)

Combustion

c)

Polymerisation

d)

Hydrogenation

6.
Both alkanes and alkenes react rapidly with aqueous bromine at room temperature.
a)
True
b)
False
7.
Which of the following is correct about structural isomers?
a)
They have different molecular formulas
b)
They must have any double or triple bonds in the same position
c)
They can be either positional or chain isomers
d)
They must have the same length main chain
8.

Reaction between this compound and two mole of H2 in the presence of Ni catalyst will produce

a)

3-methylbutene

b)

3-methylbutane

c)

2-methylbutane

d)

2-methylbutene

e)

n-butane

9.

State the type of reaction of the above reaction.

a)

Nucleophilic Addition Reaction

b)

Electrophilic Substitution reaction

c)

Free Radical Substitution reaction

d)

Rearrangement

10.

How many steps of mechanism for Free Radical Substitution Reaction of Alkane.

a)

1

b)

2

c)

3

d)

4

11.

What is the major product formed for this reaction.

a)
b)
c)
d)
12.

Draw the structural formulae of monosubstituted major formed when the above alkane subjected to the bromination reaction under sunlight.

a)
b)
c)
d)
13.

Electrophilic Addition involves...

a)

The addition of a nucleophile to an alkane

b)

The addition of a electrophile to an alkane

c)

The addition of a electrophile to an alkene

d)

The subtraction of a nucleophile to an alkene

14.

What would you make if you added Hydrogen to Ethene?

a)

Ethane

b)

Propane

c)

1,2 - dihydroethane

d)

Ethanol

15.

Propene + Steam would make?

a)

Propan-1-ol

b)

Propan-2-ol

c)

Propan-1-ol and propan-3-ol

d)

Propan-1-ol and propan-2-ol

16.

Hydrogenation conditions are...

a)

Powdered nickel catalyst, heat, pressure of 5ATM

b)

Powdered nickel catalyst, room temperature and pressure

c)

Water as steam, high pressure, with a silica catalyst

d)

Aqueous hydrogen bromide

17.
Diagram shows the formation of
a)
1° carbocation
b)
2° carbocation
c)
3° carbocation
d)
None of the above
18.
Which carbocation is most stable and why?
a)
1°carbocation because of strong inductive effect
b)
1°carbocation because of weak inductive effect
c)
3°carbocation because of weak inductive effect
d)
3°carbocation because of strong inductive effect
19.
Reaction between Benzene + Br2 is called
a)
Electrophilic addition
b)
Electrophilic substitution
c)
Nucleophilic addition
d)
Nucleophilic substitution
20.
Benzene undergo electrophilic substitution NOT addition because
a)
Stability of benzene ring
b)
Stability due to delocalization of π electron in benzene
c)
Delocalization of π electron in benzene
d)
Benzene is unreactive