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546
The pH of 0.50 mol dm
-3
solutions of HCI, H
2
SO
4
and CH
3
COOH were measured. which of the following statements about the values obtained is correct?
A.
the pH value was equal to 5 in each case
B.
the pH values of the HCI and H
2
SO
4
solutions were equal
C.
their pH values added uo to 14
D.
the pH value of the CH
3
COOH was the highest.
View Answer & Discuss (3)
WAEC 2003
547
Which of the following processes involves neutralization?
A.
Hardening of oils
B.
Souring of milk
C.
Charring of sugar
D.
Liming of soil
View Answer & Discuss (4)
WAEC 2003
548
Sea shells contain mainly CaCO
3
. Calcium oxide can be prepared from sea shells by
A.
adding dilute acid
B.
heating at a high temperature
C.
reduction with CO
D.
adding dilute NaOH
(aq)
View Answer & Discuss
WAEC 2003
549
Which of the following statements about an exothermic reaction is correct?
A.
the products have less heat content than reactants
B.
the system absorbs heat from the surrounding
C.
the activation energy is high
D.
the enthalpy change is positive
View Answer & Discuss (1)
WAEC 2003
550
A reducing agent is expected to
A.
decolourize acidified KMnO
4
solution
B.
decolourize acidified FeSO
4
solution
C.
liberate CI
2
from a chloride
D.
liberate CO
2
from NaHCO
3
View Answer & Discuss (5)
WAEC 2003
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