Metals and their compounds Generix Content - Metals and their compounds
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JAMB questions for "Chemistry :: Metals and their compounds"
Q1

A constituent common to bronze and solder is

A

copper

B

tin

C

lead

D

silver

E
Q2

When iron is exposed to moist air, it gradually rusts. This is due to the formation of

A

anhydrous iron (II) oxide

B

hydrated iron (II) oxide

C

hydrated iron (III) oxide

D

anhydrous iron (III) oxide

E
Q3

A compound gives an orange-red colour to a non-luminous flame. This compound is likely to contain

A

Fe3+

B

Fe2+

C

Na+

D

Ca2+

E
Q4

Stainless steel is used for making

A

coins and medals

B

moving parts of clocks

C

magnets

D

tools

E
Q5

The nomenclature of the compound above is

A

5 - propylheptane

B

3 - propylheptane

C

4 - ethyloctane

D

5 - ethayloctane

E
Q6

Which of the following metals will shoe the highest metallic character?

A

Zinc

B

Copper

C

Barium

D

Calcium

E
Q7

Copper metal dissolves in concentrated trioxonitrate (V) acid with her resultant evolution of 

A

CO2

B

SO2

C

NO2

D

CO

E
Q8

The type of iron best suited for welding making nails, chains iron rods is

A

pig iron

B

wrought iron

C

cast iron

D

iron pyrites

E
Q9

In the electrolytic extraction of aluminium, the function of the molten cryolite to

A

precipitate aluminium hydroxide

B

lower the melting point of aluminium oxide

C

act as raw material

D

act as a solvent

E
Q10

One of the products of the thermal decomposition of sodium trioxonitrate (V) is 

A

sodium 

B

nitrogen

C

sodium dioxonitrate (III)

D

sodium oxide

E
Q11

Which of the following class of compounds can exist as dipolar ions in solution?

A

Alkanoic acids

B

Fatty acids

C

Dialkanoic acids

D

Amino acids

E
Q12

A compound commonly used for setrilization and preservation of specimens and food is

A

ethanol

B

benzene

C

ether

D

ammonia

E
Q13

A red precipitate of copper (I) carbide is formed when ammonium solution of copper (I) chloride is introduced into

A

CH2 = CH - CH2 - CH3

B

CH3CH2 - C ≡ CH

C

CH3 CH2 CH2 CH3

D

CH3 - C ≡ C -CH3

E
Q14

The product obtained when a mixture of benzene vapour and hydrogen are passed over a nickel catalyst at 1800C is 

A

cyclohexane

B

cyclopentane

C

n-hexane

D

n-pentane

E
Q15

Polyvinyl chloride is used in the production of 

A

glass

B

alloy

C

pipes

D

ceramics

E
Q16

How long will it take to deposit 0.08g of copper from CuCl2 solution by passing a current of 0.5A?

 

[Cu = 64, F = 96 500 C mol-1]

A

48 mins

B

24 mins

C

8 mins

D

6 mins

E
Q17

What happens when zinc rod is immersed in copper (II) tetraoxosulphate (VI) solution?

A

Electrons flow from copper to zinc

B

The zinc rod remains undissolved

C

The copper generates more copper ions

D

The blue colour of the solution disappears

E
Q18

Dissolving some pellets of NaOH in water would result in

A

a decrease in the entropy of the solution

B

a lowering of the temperature of the temperature of the solution

C

an increase in the entropy of the solution

D

a decrease in the free energy of the solution

E
Q19

Copper and silver metals are commonly used as coins because they are

A

not easily reduced

B

not easily oxidized

C

easily reduced

D

easily oxidized

E
Q20

Which of the following sets of metals dissolves in dilute HCl?

A

Mg, Fe and Cu

B

Mg, Sn and Fe

C

Cu, Mg and Sn

D

Fe, Sn and Cu

E
Q21

The soft solder used for welding and plumbing is an alloy of

A

lead and zinc

B

iron and zinc

C

iron and tin

D

lead and tin

E
Q22
CH3 — CH2 — C ≡ CH   The hybridization in the compound above is
A
sp2
B
sp
C
sp3 and sp2
D
sp3 and sp
E
Q23
A particle that contains 11 protons, 12 neutrons and 10 electrons is probably a
A
neutral non-metal
B
metallic ion
C
non-metalic ion
D
neutral metal
E
Q24
The ion that can be uses as an oxidizing agent is 
A
Au3+
B
Fe3+
C
F-
D
Ca2+
E
Q25
Zinc and carbon rods are used as anode and cathode respectively in a 
A
Leclanche cell
B
lead accumulator
C
Daniell cell
D
voltaic cell
E
Q26
The most suitable metal that can be used as a lightening conductor is
A
aluminium
B
iron
C
copper
D
silver
E
Q27
Metalloids are also referred to as 
A
metals
B
semi-metals
C
colloids
D
non-metals
E
Q28
which of the following alloys contain iron?
A
Steel and permalloy
B
Duralumin and steel
C
Soft solder and duralumin
D
Brass and bronze
E
Q29
When pure aluminium metal is heated to red hot in the presence of nitrogen gas, the compound formed is 
A
Al2N
B
AlN
C
Al2N2
D
Al2N3
E
Q30
When water boilers are used for a long period of time, the solid substances left behind as scale are
A
magnesium trioxosilicate (IV) and calcium tetraoxosulphate (VI)
B
magnesium trioxosilicate (IV) and rust
C
clay and magnesium trioxosilicate (IV)
D
clay and rust
E
Q31
When iron is exposed to moisture  and it rusts, the value of ΔG for the reaction is
A
positive
B
negative
C
zero
D
neutral
E
Q32
What will happen if an aluminium spoon is used to stir a solution of iron (II) trioxonitrate (V)?
A
The spoon will be reduced while the iron (II) ions will be oxidized
B
The spoon will be oxidized while the iron (II) ions will be reduced to the metals
C
The spoon will be reduced
D
The spoon will increase in size
E
Q33
Sodium metals is always kept under oil because it
A
is reduced by atmospheric nitrogen
B
readily reacts with water
C
reacts with oxygen and carbon (VI) oxide
D
reacts vigorously on exposure to air.
E
Q34
Alloys are best prepared by
A
cooling a molten mixture of the metals
B
reducing a mixture of their metallic oxides
C
arc welding
D
electroplating
E
Q35
Aluminum hydroxide is used in the dyeing industry as a 
A
dye
B
dispersant
C
salt
D
mordant
E
Q36
What volume of gas is evolved at s.t.p. If 2g of calcium trioxocarbonate (VI) is added to a solution of hydrochloric acid?   [Ca = 40, C = 12,  O = 16, Cl = 35.5, H = 1]Molar volume of a gas at s.t.p = 22.4 dm3 
A
224 cm3
B
112 cm3
C
2240 cm3
D
448 cm3
E
Q37
Hydrogen can be displaced from a hot alkaline solution by
A
Sn
B
Fe
C
Cu
D
Ca
E
Q38
The modern process of manufacturing steel from iron is by
A
blast reduction
B
treatment with acid
C
treatment with alkalis
D
oxidatior
E
Q39
The metal that liberates hydrogen from cold water in bubbles only is
A
Al
B
Ca
C
K
D
Na
E
Q40
Metals of the first transition series have special properties which are different from those of groups l and ll elements because they have partially filled 
A
f orbitals
B
d orbitals
C
s orbitals
D
p orbitals
E
Q41
Hydrogen is readily released when dilute hydrochloric acid reacts with
A
Cu
B
Na
C
Au
D
Ag
E
Q42
Ordinary glass is manufactured from silica, CaCO3 and
A
Na2CO3
B
K2CO3
C
K2SO4
D
NaHCO3
E
Q43
A red precipitate of copper (I) carbide is formed when ammonium solution of copper (I) chloride is introduced into
A
CH3 CH2 CH2 CH3
B
CH2 = CH - CH2 CH3
C
CH3CH2 - C ≡ CH
D
CH3 - C ≡C -CH3
E
Q44
Steam changes the colour of anhydrous colbalt (II) chloride from
A
blue to pink
B
white to red
C
white to green
D
blue to white
E
Q45
Cu2S(s) + O2(g) → 2Cu(s) + SO2(g)   What is the change in the oxidation number of copper in the reaction above?
A
+1 to 0
B
0 to +2
C
+2 to +1
D
0 to +1
E
Q46
When H2S is passed into a solution of iron (III) chloride, the solution turns
A
pale green
B
pale red
C
brown
D
colourless
E
Q47
When sodium reacts with water, the resulting solution is
A
alkaline 
B
acidic
C
neutral
D
weakly acid
E
Q48
Which of the following metals burns with brick-red flame?
A
Ca
B
Na
C
Mg
D
Pb
E
Q49
The main impurity in iron ore during the extraction of iron is 
A
calcium trioxosilicate
B
silicon (IV) oxide
C
sulphur (II) oxide
D
carbon (IV) oxide
E
Q50
A metal M displaces Zinc from zinc chloride solution. This shows that
A
M is more electronegative than zinc
B
zinc is above hydrogen in the series
C
electrons flow from zinc to M
D
M is more electropositive than zinc
E
Q51
What current in amperes will deposit 2.7 g of aluminium in 2 hours?   [Al = 27, F = 96 500 C mol-1]
A
32
B
16
C
8
D
4
E
Q52
A common characteristics of copper and silver in their usage as coinage metals is that they 
A
have high metallic lustre
B
are not easily oxidized
C
are easily oxidized
D
are not easily reduced
E
Q53
Heamatite is an ore of
A
zinc
B
lead
C
iron
D
copper
E
Q54
The least easily oxidized of the metals below is 
A
Ca
B
Na
C
Zn
D
Al
E
Q55
what properties of duralumin make it more useful than its constituent metals?
A
it is heavy with a high melting point
B
It is malleable and has high density
C
it is strong and light
D
It is hard and ductile
E
Q56
The pair of metals in the reactivity series that are usually extracted by the electrolysis of their ores is 
A
magnesium and zinc
B
magnesium and calcium
C
copper and zinc
D
lead and calcium
E
Q57
Chlorine, bromine and iodine resemble one another in that they
A
dissolve in alkalis
B
react violently with hydrogen without heating
C
are liquids
D
displace one another from solutions of their salts
E
Q58
A pair of compounds that can be used to generate a gas which physiological effect on human beings is 
A
Sodium trioxonitrate (V) and calcium chloride
B
Sodium dioxonitrate (III) and ammonium chloride
C
sodium trioxonitrate (V) and ammonium chloride
D
Sodium dioxonitrate (III) and potassium chloride
E
Q59
In the diagram above, y is a mixture of
A
calcium hydroxide and ammonium chloride
B
calcium hydroxide and sodium chloride
C
sodium chloride and ammonium trioxonitrate (V)
D
sodium dioxonitrate (III) and ammonium chloride
E
Q60
A metal that can be extracted from cassiterite is
A
calcium
B
magnesium
C
tin
D
copper
E