🧪 2001

JAMB Chemistry 2001 past questions

40 questions from the 2001 JAMB UTME Chemistry paper. Free, with answers where available.

Practice with CBT mock → All Chemistry years
Chemistry JAMB 2001 Q1 ✓ Answer: A
The formula CH2O for ethanoic acid is regarded as its
A
empirical formula Chemistry 2002
B
move at different speeds in the column
C
react with the solvent
D
react with each other.
Chemistry JAMB 2001 Q2 ✓ Answer: A
What mass of water is produced when 8.0g of hydrogen reacts with excess oxygen?
A
72.0g,
B
36.0g,
C
16.0g,
D
8.0g Use the graph below to answer questions 3 and 4
Chemistry JAMB 2001 Q2 ✓ Answer: D
Which of the following gases contains the least number of atoms at s.t.p?
A
7 moles of argon
B
4 moles of chlorine
C
3 moles of ozone
D
1 mole of butane
Chemistry JAMB 2001 Q3 ✓ Answer: A
How long does it take all the solid to melt?
A
6.0mins,
B
3.0mins,
C
2.5mins,
D
1.0min
Chemistry JAMB 2001 Q3 ✓ Answer: B
The chromatographic separation of ink is based on the ability of the components to function as
A
a reducing agent
B
a catalyst
C
a dehydrating agent
D
an oxidizing agent
Chemistry JAMB 2001 Q4 ✓ Answer: D
If the gas is cooled, at what temperature will it start to condense?
A
175oC,
B
250oC,
C
125oC,
D
150oC
Chemistry JAMB 2001 Q5 ✓ Answer: B
Four elements W,X,Y and Z have atomic numbers 2,6,16 and 20 respectively. Which of these elements is a meal?
A
X,
B
Z,
C
W,
D
Y
Chemistry JAMB 2001 Q6 ✓ Answer: D
The diagram above represents the formation of
A
a metallic bond,
B
a covalent bond,
C
an electrovalent bond. D a coordinate covalent bond
Chemistry JAMB 2001 Q8 ✓ Answer: D
Cancerous growth are cured by exposure to
A
x-rays,
B
betta-rays,
C
alpha-rays,
D
gamma-rays
Chemistry JAMB 2001 Q9 ✓ Answer: B
Which of the following statement is correct about the average kinetic energy of the molecules of a gas?
A
it increases with increase in pressure,
B
it increases with increase in temperature,
C
It increases with increase in volume,
D
It increases at constant pressure.
Chemistry JAMB 2001 Q10 ✓ Answer: D
Millikan’s contribution to the development of atomic theory is the determination of
A
positive rays,
B
cathode rays,
C
charge to mass ratio ,
D
charge on electron.
Chemistry JAMB 2001 Q13 ✓ Answer: C
The chemical used for coagulation in water purification is
A
copper tetraoxosulphate (VI)
B
sodium tetraoxosulphate (VI)
C
aluminium tetraoxosulphate (VI)
D
calcium tetraoxosulphate (VI)
Chemistry JAMB 2001 Q14 ✓ Answer: A
Environment pollution is worsened by the release from automobile exhausts of
A
heavy metals
B
water vapour
C
smoke
D
steam
Chemistry JAMB 2001 Q15 ✓ Answer: C
Phosphorus is stored under water to prevent it from
A
smelling
B
dehydrating
C
catching fire
D
becoming inert
Chemistry JAMB 2001 Q16 ✓ Answer: D
Pure solvents are obtained by
A
evaporation
B
extraction
C
condensation
D
distillation [PAGE 61]
Chemistry JAMB 2001 Q17 ✓ Answer: C
At what temperature are the solubilities of L and K the same?
A
750C
B
1000C
C
900C
D
820C
Chemistry JAMB 2001 Q18 ✓ Answer: A
If 1 dm3 of a saturated solution of L at 600C is cooled to 250C, what amount in mole will separate?
A
0.25
B
0.50
C
0.75
D
1.00
Chemistry JAMB 2001 Q19 ✓ Answer: A
Deliquescent substance are used for
A
drying
B
melting
C
wetting
D
cooling
Chemistry JAMB 2001 Q20 ✓ Answer: D
What is the decrease in volume of air when pyrogallol is shaken with 30.00cm3 of air?
A
0.63cm3
B
0.06cm3
C
15.00cm3
D
6.30cm3
Chemistry JAMB 2001 Q21 ✓ Answer: D
The pollution from petroleum spillage in rivers and takes can best be dispersed by
A
passing of ships through the area
B
pouring detergents
C
pouring organic solvents
D
evaporation
Chemistry JAMB 2001 Q22 ✓ Answer: C
3Cu(s) + 8HNO3(aq) 3Cu(NO3)2(aq) + 4H20(i)+2NO(g) In the equation above, copper is
A
a base
B
an oxidizing agent
C
a reducing agent
D
an electron acceptor.
Chemistry JAMB 2001 Q23 ✓ Answer: D
NH3(g) + HCI(g) ’! NH4CI(s) The entropy change in the system above is
A
zero
B
indeterminate
C
positive
D
negative
Chemistry JAMB 2001 Q25 ✓ Answer: B
2SO2(g)+O2 (g) 2SO3(g) The equilibrium constant for the reaction above is increased by
A
increasing the pressure of the system
B
increasing the temperature of the system
C
increasing the surface area of the vessel
D
the addition of a catalyst to the system
Chemistry JAMB 2001 Q26 ✓ Answer: A
As the concentration of an electrolyte reduces, the conductivity
A
decreases
B
increases
C
reduces to zero
D
is unaffected.
Chemistry JAMB 2001 Q27 ✓ Answer: A
C(s) + 2S(g) CS2 H =89kJmol-1 The chemical equation above implies that
A
89kJ of energy is absorbed
B
each of carbon and sulphur has 89 kJ of energy
C
both carbon and sulphur contribute 89kJ of energy
D
89 kJ of energy is released
Chemistry JAMB 2001 Q29 ✓ Answer: D
In which of the following reaction have the oxidation number of nitrogen increased?
A
2NO(g) + Br2 (l) 2NOBr(1)
B
FeSO4 (aq) + NO(g) Fe(NO)SO4(s)
C
2NO(g) + CI2(g) 2NOCI(l)
D
2NO(g) + O2(g) 2NO2(g)
Chemistry JAMB 2001 Q30 ✓ Answer: A
P(g) + Q(g) 3R(s)+S(g) which of the following will increase the yield of R?
A
Removing some S
B
Using a larger closed vessel
C
Adding a positive catalyst
D
Increasing the temperature Ethanoic acid is
Chemistry JAMB 2001 Q33 ✓ Answer: C
In which of the following reactions does reduction take place?
A
2O2-——————O2 + 4e-
B
Fe2+ - e———————Fe3+
C
2H+-——————H2
D
Cr – 2e———————Cr2+
Chemistry JAMB 2001 Q34 ✓ Answer: B
When H is negative, a reaction is said to be
A
Endothermic
B
Exothermic
C
Rerverisble
D
Ionic. [PAGE 62] ethyne?
Chemistry JAMB 2001 Q36 ✓ Answer: B
Protein in acid solution undergo
A
Polymorphism
B
Hydrolysis
C
Fermentation
D
Substitution
Chemistry JAMB 2001 Q37 ✓ Answer: C
Fermentation is the
A
breaking down of carbohydrate to glucose
B
breaking down of sugar to carbohydrate
C
conversion of sugar to alcohol in the presence of yeast
D
conversion of alcohol to sugar in the presence of yeast.
Chemistry JAMB 2001 Q38 ✓ Answer: D
Catalytic hydrogenation of benzene produces
A
Cyclohexene
B
Oil
C
Margarine
D
Cyclohexane.
Chemistry JAMB 2001 Q40 ✓ Answer: C
When chlorine is passed into water and the resulting solution exposed to sunlight, the products formed are
A
Chlorine gas and hydrogen
B
Hydrochloric acid and oxygen
C
Chlorine gas and oxochlorate (1) acid
D
Oxygen and oxochlorate (1) acid
Chemistry JAMB 2001 Q41 ✓ Answer: A
The pair of organic compounds that are isomers is
A
But – 1-ene and but – 2-ene
B
Ethanol and propanone
C
Trichlorometheane and tetrachloromethane
D
Benzene and methylbenzene
Chemistry JAMB 2001 Q43 ✓ Answer: D
During the vulcanization of rubber sulphur is added to
A
lengthen the chain of rubber
B
break down rubber polymer
C
act as a catalyst
D
bind rubber molecules together
Chemistry JAMB 2001 Q44 ✓ Answer: A
When sodium reacts with water, the resulting solution is
A
Alkaline
B
Acidic
C
Neutral
D
Weakly acidic.
Chemistry JAMB 2001 Q45 ✓ Answer: C
The general formula for the alkanals is
A
RCOOR1
B
R1CO
C
RCHO
D
ROH
Chemistry JAMB 2001 Q46 ✓ Answer: C
Which of the following metals burns with a brick red flame?
A
Ca
B
Na
C
Mg
D
Pb
Chemistry JAMB 2001 Q47 ✓ Answer: A
The gas that can best be collected by downward displacement of air is
A
Chlorine
B
Sulphur (IV) oxide
C
Carbon (IV) oxideD. Ammonia.
Chemistry JAMB 2001 Q49 ✓ Answer: B
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.