2019 - JAMB Chemistry Past Questions and Answers - page 1
1
A second alkanol can be oxidized to give an
A
alkanone
B
alkyne
C
alkanoic acid
D
alkanal
2
Which of the following will give a precipitate with an aqueous solution of copper (I) chloride?
A
But-2-ene
B
But-1-ene
C
But-2-yne
D
But-1-yne
3
The IUPAC name for CH\(_3\)CH\(_2\)COOCH\(_2\)CH\(_3\) is
A
methylpropanoate
B
ethylethanoate
C
ethylpropanoate
D
methylethanoate
4
A certain hydrocarbon on complete combustion at s.t.p produced 89.6dm\(^3\) of CO\(_2\) and 54g of water. The hydrocarbon should be
A
C\(_6\)H\(_6\)
B
C\(_4\)H\(_{10}\)
C
C\(_5\)H\(_{10}\)
D
C\(_4\)H\(_6\)
5
2-methylprop-1-ene is an isomer of
A
3-methyl but-1-ene
B
2-methyl but-1-ene
C
but-2-ene
D
pent-2-ene
6
Hydrocarbons which will react with Tollen's reagent conform to the general formula
A
C\(_n\)H\(_{2n}\)
B
C\(_n\)H\(_{2n + 2}\)
C
C\(_n\)H\(_{2n - 2}\)
D
C\(_n\)H\(_{2n + 1}\)OH
7
The IUPAC name of the compound CF\(_3\)CHBrCl is
A
2-chloro-2-bromo-1,1,1-trifluoroethane
B
2-bromo-2-chloro-1,1,1-trifluoroethane
C
1-bromo-1-chloro-2,2,2-trifluoroethane
D
1,1,1-trifluoro-2-bromo-2-chloroethane
8
Synthetic rubber is obtained from the polymerization of
A
neoprene
B
isoprene
C
butandiene
D
propylene
9
Burning magnesium ribbon in air removes which of the following
(i) oxygen (ii) nitrogen (iii) argon and (iv) carbon(iv)oxide?
A
i and iv only
B
i, ii, iii and iv only
C
i only
D
i and ii only
10
Which of the following is the best starting material for the preparation of oxygen? Heating of trioxonitrate (v) with
A
Pb
B
Zn
C
Ca
D
Na
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