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Hydrocarbons

Total questions: 40

Worksheet time: 25mins

Name
Class
Date
1.
How many carbon atoms are in methane?
a)
1
b)
2
c)
3
d)
4
2.
Which of the following elements must be present in any organic compound?
a)
Carbon
b)
Oxygen
c)
Potassium
d)
Hydrogen
3.
At which pipe: M or N are hydrocarbons with lower boiling points collected?
a)
M
b)
N
4.
Name this alkane
a)
Methane
b)
Ethane
c)
Propane
d)
Butane
5.
Name this alkane
a)
Methane
b)
Ethane
c)
Propane
d)
Butane
6.
The following compounds have a molecular formula of
a)
CnH2n+2
b)
CH4
c)
C6H14
d)
CH3CH2CH2CH2CH2CH3
7.
Which compound is inorganic?
a)
Glucose (C₆H₁₂O₆)
b)
Ethane (C₂H₆)
c)
Carbon Dioxide (CO₂)
d)
Stearic Acid (C₁₈H₃₆O₂)
8.
As the number of carbons increases in an homologous series the melting point generally...
a)
increase
b)
decrease
c)
stay the same
d)
varies
9.
Which of the following would have the highest melting point?
a)
C3H8
b)
C4H8
c)
C5H12
d)
C22H44
10.
Which of the following generally undergoes substitution reactions
a)
alkanes
b)
alkenes
c)
Alkanes and alkenes 
d)
algebras
11.
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
12.

Name the following alkane?

a)

3-ethyl octane

b)

2-ethyl hexane

c)

3-ethyl heptane

d)

5-ethyl heptane

13.

Name the following alkane:

a)

2-methyl pentane

b)

1-methyl hexane

c)

1,1-dimethyl pentane

d)

1,2-dimethyl butane

14.

Name the following alkane:

a)

3-ethyl hexane

b)

3-ethyl 2-methyl pentane

c)

2-methyl 3-ethyl pentane

d)

3-ethyl 4-methyl pentane

15.

Complete the formula for this alkene C (a)   H18

16.

The given image is the structure of linoleic acid in ...

a)

Expanded form

b)

Condensed form

c)

Skeletal form

17.

Isomers are molecules that have the _________molecular formula (contain the same number of atoms) but ______ structurally (having different arrangement of the atoms in space).

a)

differ, differ

b)

same, differ

c)

same, same

d)

differ, same

18.

Only _________ molecules have optical isomers.

a)

achiral

b)

chiral

c)

hybrid

d)

hydrocarbon

19.

Two ______________ are non-superimposable mirror image of one another (chiral).

a)

enantiomer

b)

isomer

c)

non-enantiomer

d)

geometric

20.

The skeletal formula for CH3CH2CH2CH3 is ….

Hint: each end and corner is a carbon.

a)
b)
c)
d)
21.

Give the name of this compound?

a)

Propene

b)

Butyne

c)

Butene

d)

Propane

22.
If an alkane has 20 carbon atoms, how many hydrogen atoms will it have?
a)
20
b)
22
c)
40
d)
42
23.

Does this molecule exhibit optical isomerism?

a)

Yes

b)

No

24.

Does this molecule exhibit optical isomerism?

a)

Yes

b)

No

25.

chiral centre: a ______ atom bonded with _______ different groups

a)

carbon , four

b)

hydrogen, two

c)

oxygen , four

d)

oxygen, two

26.

What is the alkyl name for CH3

a)

methyl

b)

ethyl

c)

propyl

d)

butyl

27.

What is the condition needed for substitution reaction with chlorine?

a)

presence of sunlight

b)

presence of red light

c)

presence of UV light

d)

all of the above

28.

State the general formula for alkane

a)

CnH2n+2

b)

CnH2n

c)

CnH2n+1

d)

CnH2n-2

29.
How many chiral center is found in C2H5CH(OH)CH2OH?
a)
1
b)
2
c)
3
d)
4
30.

Can this compound can form optical isomers?

a)

No

b)

yes

c)

depends on whether it wants to or not

31.

The optical isomer of this compound is

a)
b)
c)
32.

Optical isomers

a)

reflect polarised light in opposite directions

b)

rotate polarised light in opposite directions

c)

reflect plane polarised light in opposite directions

d)

rotate plane polarised light in opposite directions

33.

How many chiral carbons are present and where?

a)

2 chiral carbons - carbon 3 and 2

b)

1 chiral carbon - carbon 3

c)

1 chiral carbon - carbon 5

d)

no chiral carbons

34.

Name this compound

a)

hexane

b)

methylhexane

c)

2-methylpentane

d)

5-methylpentane

e)

methylpentane

35.

A structural isomer of pentane is?

a)

2-methyl butane

b)

2,2-dimethyl octane

c)

1-methyl propane

d)

1-methyl pentane

36.
Are the compounds shown isomers
a)
Yes
b)
No
37.
a)
addition
b)
combustion
c)
double replacement
d)
substitution
38.
What is the structure of 2-methyl pent-2-ene ?
a)
a
b)
b
c)
c
d)
d
39.

Name the following molecule:

a)

3,3-dimethyl-1-butanol

b)

3,3-methyl-1-butanol

c)

2,2-dimethyl-4-butanol

d)

3,3,3-trimethyl-1-propanol

40.

How many structural isomers does C5H12 have?

a)

2

b)

3

c)

5

d)

9

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