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

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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
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3

The IUPAC name for CH\(_3\)CH\(_2\)COOCH\(_2\)CH\(_3\) is

A

methylpropanoate

B

ethylethanoate

C

ethylpropanoate

D

methylethanoate

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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\(_6\)
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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

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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

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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
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8

Synthetic rubber is obtained from the polymerization of

A

neoprene

B

isoprene

C

butandiene

D

propylene

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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

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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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