Q1.
What is the IUPAC name for this compound?
A
2-dimethyl-3-fluoropentane
B
2,2-dimethyl-3-fluoropentane
C
3-fluoro-2,2-dimethylpentane
D
3-fluoro-2-dimethylpentane
(Total 1 mark)
Q2.
The correct systematic name for
is
A
2-ethyl-3,4-dimethylpent-2-ene
B
4-ethyl-2,3-dimethylpent-3-ene
C
2,3,4-trirnethylhex-3-ene
D
3,4,5-trimethylhex-3-ene
(Total 1 mark)
Q3.
Which can be both an empirical and molecular formula of a stable compound?
A CH2O
B P4O10
C NH2
D CH3
(Total 1 mark)
Q4.
The correct name for the alkene monomer which forms the polymer shown below is
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A
2-methyl-3-ethylpropene
B
2-methylpent-2-ene
C
2-methylpent-3-ene
D
4-methylpent-2-ene
(Total 1 mark)
Q5.
The correct systematic name for
is
A
2,3-diethylbut-2-ene
B
2-ethyl-3-methylpent-2-ene
C
4-ethyl-3-methylpent-3-ene
D
3,4-dimethylhex-3-ene
(Total 1 mark)
Q6.
CH2O is the empirical formula of
A
methanol
B
methyl methanoate
C
ethane-1,2-diol
D
butanal
(Total 1 mark)
Q7.
Which compound has the lowest relative molecular mass?
A
ethanoic acid
B
1-fluoropropane
C
propanenitrile
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D
propylamine
(Total 1 mark)
Q8.
Which one of the following is the correct name for
A
2-bromo-3-methylpent-2-ene
B
2-bromo-3-ethylbut-2-ene
C
3-bromo-2-ethylbut-2-ene
D
4-bromo-3-methylpent-3-ene
?
(Total 1 mark)
Q9.
The structural formula of ethyl 2-methylpropanoate is
A
B
C
D
(Total 1 mark)
Q10.
This question is about citric acid, a hydrated tricarboxylic acid. Its formula can be
represented as H3Y.xH2O
(a)
A 1.50 g sample of H3Y.xH2O contains 0.913 g of oxygen by mass.
The sample burns completely in air to form 1.89 g of CO2 and 0.643 g of H2O
Show that the empirical formula of citric acid is C3H5O4
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(5)
(b)
A 3.00 g sample of H3Y.xH2O (Mr = 210.0) is heated to constant mass. The
anhydrous H3Y that remains has a mass of 2.74 g
Show, using these data, that the value of x = 1
(2)
The figure shows the structure of H3Y
(c)
Complete this IUPAC name for H3Y
____________________ propane-1, 2, 3-tricarboxylic acid
(1)
(d)
State the number of peaks you would expect in the 13C NMR spectrum for H3Y
___________________________________________________________________
(1)
(Total 9 marks)
Q11.
Isomers X and Y have the molecular formula C5H8O
Give the IUPAC name for isomer X.
___________________________________________________________________
(1)
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(Total 1 mark)
Q12.
This question is about the structures of some organic molecules.
(a)
Draw the skeletal formula of 3-methylbutanal.
(1)
(b)
Draw the displayed formula of C5H11Br that is the major product of the reaction of 2methylbut-2-ene with hydrogen bromide.
(1)
(c)
Thermal cracking of hydrocarbons produces molecules that are attacked by
electrophiles because they have a region of high electron density.
Draw the structure of one of these molecules that contains four carbon atoms.
(1)
(Total 3 marks)
Q13.
The table below gives some of the names and structures of isomers having the molecular
formula C4H9Br
Structure
Name
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CH3CH2CH2CH2Br
2-bromo - 2-methypropane
1-bromo - 2-methypropane
2-methypropane
Complete the table.
(Total 2 marks)
Q14.
Four isomers with the formula C4H9OH are given below.
Isomer
Name
CH3CH2CH2CH2OH
butan-1-ol
2-methylpropan-2-ol
(i)
Complete the naming of the isomers in the table above.
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(ii)
Name the type of isomerism shown by these four isomers.
___________________________________________________________________
(Total 3 marks)
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