1990 - JAMB Chemistry Past Questions and Answers - page 2
11
Which of the following tests will completely identify anyone of surphur (VI) oxide, hydrogen, carbon (IV) oxide and nitrogen (II) oxide?
A
Pass each gas into water and test with blue litmus paper
B
Pass each gas into lime water
C
Expose each gas to atmospheric air
D
Pass each gas to concentrated tetraoxosulphate (IV) acid
correct option: b
Users' Answers & Comments12
In the Haber process for the manufacture of ammonia, the catalyst commonly used is finely divided ?
A
vanadium
B
platinum
C
iron
D
copper
correct option: c
Users' Answers & Comments13
A metallic oxide which reacts with both HCl and NaOH to give salt and water only can be classified as?
A
an acidic oxide
B
a basic oxide
C
a neutral oxide
D
an amphoteric oxide
correct option: d
Users' Answers & Comments14
Which of the following metals will liberate hydrogen from steam or dilute acid?
A
Copper
B
Iron
C
Lead
D
Mercury
correct option: b
Users' Answers & Comments15
Coal fire should not be used in poorly ventilated rooms because ?
A
of the accumulation of CO2 which causes dep sleep
B
it is usually too hot
C
of the acumulation of CO which causes suffocation
D
it removes most most of the gases in the rooms
correct option: c
Users' Answers & Comments16
The major component of the slag from the production of iron is?
A
an alloy of calcium and iron
B
coke
C
impure iron
D
calcium trioxosilicate (IV)
correct option: b
Users' Answers & Comments17
Sodium hydrogen should be stored in properly closed containers because it?
A
readily asborbs water vapour to air
B
is easily oxidize by atmospheric oxygen
C
turns golden yellow when exposed to light
D
melts at a low temperature
correct option: a
Users' Answers & Comments18
To make coloured glasses, small quantities of oxides of metals which form coloured silicates are often added to the reaction mixture consisting of Na2CO3 and SiO2. Such a metals is a?.
A
pottasium
B
barium
C
zinc
D
copper
correct option: d
Users' Answers & Comments19
Which of the following compounds gives a yellow residue when heated and also reacts with aqueous sodium hydroxide to give a white gelatinous precipitate soluble in excess sodium hydroxide solution?
A
(NH4)CO3
B
ZnCO3
C
Al2(SO4)3
D
PbCO3
correct option: b
Users' Answers & Comments20
A cycloalkane with the molecular formula C5H10 has ?
A
one isomer
B
two isomers
C
three isomers
D
four isomers
correct option: c
Users' Answers & Comments