CARBON COMPOUNDS
1.
SECTION A
Diagram 1 shows structural formula of a hydrocarbon.
H
DIAGRAM 1
a)
State a general formula and name the hydrocarbon.
General formula : ……………………………………..
Name
: …………………………………….
[2 marks]
b)
Draw two isomers of the hydrocarbon.
[2
marks]
c)
(i)
Write a chemical equation for the reaction between bromine water and the
hydrocarbon.
…………………………………………………………………………….....…........……….
[1 mark]
(ii)
State the observation for the reaction at (c)(i).
……………………………………………………...........………………………....………..
[1 mark]
d)
(i)
Name the gas release when the hydrocarbon combust completely.
…………………………..…………………………………………………...........................
[1 mark]
(ii) State a chemical test that can be carried out to confirm the gas release at (d)(i).
........………………………………………………………………………………….............
....…………………………………………………………………………………............….
[2 marks]
1
2
The diagram 2 shows the conversion process of propanol to other substances.
D
C3H8
E
II
C3H6
I
III
Propanol
Propanoic acid
Warm ethanoic acid and
concentrated sulphuric acid
IV
Y
DIAGRAM 2
(a)
(i)
Name process I.
…………………………………………………............………………………………
[1 mark]
(ii) Write a general formula for substance E.
……………………………………...........……………………………………………
[1 mark]
(b)
(i)
Name process II.
………………………………………………………………………………............…
[1 mark]
(ii)
State a catalyst use in process II.
...........…………………………………………………………………………………
[1 mark]
(c) Explain a chemical test to differenciate substance D and substance E.
......................…………………………………………………………………………………
......................…………………………………………………………………………………
......................…………………………………………………………………………………
[2 marks]
(d) (i)
Name a chemical substance use in process III.
............…………………………………………………………………………………
[1 mark]
2
(ii)
Based on the answer in (d)(i), state the observation in process III?
………………………………………………………............…………………………
[1 mark]
(iii)
Propanoic acid react with magnesium.
Write a chemical equation for the reaction.
………………………………………………………………………………............…
[1 mark]
(e) (i)
Substance Y is the product of process IV. Name substance Y.
..........…………………………………………………………………………………
[1 mark]
(ii)
What is the function of concentrated sulphuric acid in process IV?
…………………………………………………………………………......................
[1 mark]
3
The diagram 3 shows the conversion of several organic compound through the reactions I ,II, III and a
complete combustion of compound L in oxygen.
Compound J
C2H6O
I
III
acidified potassium dichromate (VI)
Compound K
C2H4O2
II
Complete combustion
Compound L
C2H4
Gas X + H2O
DIAGRAM 3
(a)
(i)
Name the homologous series of compound L
………………………………………………………………………....………[1 mark]
(ii)
Name gas X.
…………………………………………………………………………………[1 mark]
(iii)
Write a chemical equation for the complete combustion of compound L.
..………………………………………………………………………….........[2 markS]
(iv)
0.5 mole of compound L is burnt completely to produce gas X.
Calculate the volume of gas X produce in the reaction.
3
[1 mol of gas occupied 24 dm3 at room condition.]
[2 marks]
(b)
State the observation of acidified potassium dichromate (VI) solution in reaction III.
…………………………………………………………………………………............
[1 mark]
(c)
Compound J react with compound K to produce compound M.
(i)
Name compound M.
..................……………………………………………………………………
[1 mark]
(ii)
Draw a structural formula for compound M.
.....…………………………………………………………………………….
[1 mark]
(iii)
State one special characteristic of compound M.
......…………………………………………………………………………….
[1 mark]
(d)
Draw the set up of the apparatus for the reaction II.
[2 marks]
4
Diagram 4 shows the reactions for compound X.
Compound X,
C2H6O
Acidified potassium
manganate(VII)
I
Porcelain chips
Gas Q
II
Compound Y,
C2H4O2
III
Reflux with
Compound Z
substance X and
4
+
water
concentrated
sulphuric acid
DIAGRAM 4
(a)
Name compound X.
……………………………………………………………………......………………..
[1 mark]
(b)
(i)
Name gas Q.
....………………………………………………………………………………
[1 mark]
(ii)
Draw the set up of the apparatus for reaction I.
[2 marks]
(c)
(i)
What is the colour changes observed in reaction II.
........…………………………………………………………………………..
[1 mark]
(ii)
Draw a structural formula of compound Y.
[ 1 mark ]
(d)
Reaction III is a reflux of mixtures of substance X, substance Y and
concentrated sulphuric acid.
(i)
What is the function of concentrated sulphuric acid.
………………………………………………………………………..………..
[1 mark]
(ii)
Write a chemical equation for the reaction.
……………………………………………………………………………….
[1 mark]
(iii)
Name one special characteristic of substance Z.
………………………………………………………………………………..
[1 mark]
(iv)
Substance X is replaced with buthanol. Name the substance of the product.
5
…………………………………………………………………………………
[1 mark]
6