2006 - JAMB Chemistry Past Questions and Answers - page 1
1
The raw materials used for the smelting of iron ore in a furnace is
A
CaSO4
B
CaCO3
C
CuSO4
D
Zn(NO3)2
correct option: b
Users' Answers & Comments2
On heating, which of the following compounds will decompose to the free metal, nitrogen (IV) oxide and oxygen?
A
Ca(NO3)2
B
Cu(NO3)2
C.
AgNO3
D.
NaNO3
C
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D
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3
The group IA metals are not found free in nature because they
A
are very reactive and unstable
B
are malleable and ductile
C
have high melting and boiling point
D
conduct heat and electricity
correct option: a
Users' Answers & Comments4
Carbon exist naturally in the combined state as
A
graphite
B
coal
C
diamond
D
wood
correct option: d
Users' Answers & Comments5
The efficiency of a solid catalyst to increase reaction rates depends on its
A
surface area
B
solubility
C
concentration
D
quantity
correct option: a
Users' Answers & Comments6
Dynamic equilibrium describes a situation where
A
a reaction gives back the reactant
B
te concentration of the reactant and products is equal
C
both forward and and reverse reactions proceed at the same rate
D
reactants are converted to products
correct option: c
Users' Answers & Comments7
The ion that will give a white precipitate with aqueous NaOH and soluble in excess of the base is
A
Ca2+
B
Mg2+
C
Zn2+
D
Cu2+
correct option: c
Users' Answers & Comments8
Which of the following pairs of substance will react further with oxygen to form a higher oxide?
A
CO2 and H2O
B
NO and H2O
C
CO and CO2
D
SO2 and NO
correct option: d
Users' Answers & Comments9
The characteristic colour of the flame shown when a copper sail moistened with concentrated hydrochloric acid on a platinum wire is put on bunsen burner is
A
lilac
B
green
C
yellow
D
brick-red
correct option: b
Users' Answers & Comments10
In the industrial production of H2 from natural gas the CO2 produced along with the H2 is removed by
A
washing under pressure
B
drying over phosphorus (V) oxide
C
passing the mixture into lime water
D
using ammonical copper (I) chloride
correct option: a
Users' Answers & Comments