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Chemistry
UTME / JAMB 1978
Acids, Bases, and Salts
Solution
During the electrolysis of copper II sulphate between platinum electrodes, if litmus solution is added to the anode compartment,
A
the litmus turns blue but no gas is evolved
B
the litmus turns blue and oxygen is evolved
C
the litmus turns blue and hydrogen is evolved
D
the litmus turns red and oxygen is evolved
E
the litmus turns red and then becomes colourless
medium Difficulty
Study Explanation
Chemistry
UTME / JAMB 1978
Acids, Bases, and Salts
Solution
The reaction between an organic acid and an alcohol in the presence of an acid catalyst is known as;
A
saponification
B
dehydration
C
esterification
D
hydrolysis
E
hydration
medium Difficulty
Study Explanation
Chemistry
UTME / JAMB 1978
Acids, Bases, and Salts
Solution
The IUPAC names of the compounds CH3COOH and CH2=CH2 are respectively;
A
acetic acid and ethene
B
methanoic acid and ethene
C
methanoic acid and ethylene
D
ethanol and ethene
E
acetic acid and ethylene
medium Difficulty
Study Explanation
Chemistry
UTME / JAMB 1978
Acids, Bases, and Salts
Which of the following gases may not be dried with concentrated sulphuric acid?
A
HCl
B
N2
C
Cl2
D
SO2
E
NH3
medium Difficulty
Study Explanation
Chemistry
UTME / JAMB 1978
Acids, Bases, and Salts
Hypochlorous acid is used as a bleach because
A
it is a strong acid
B
it yields chlorine readily in pure water
C
it is an oxidising agent
D
it is a weak acid
E
it is a reducing agent
medium Difficulty
Study Explanation
Chemistry
UTME / JAMB 1978
Acids, Bases, and Salts
Solution
Which of the following compounds will form a solution if exposed to air?
A
Na2CO3.10H2O
B
NaNO3
C
CuSO4
D
CaCl2
E
Na2SO4.10H2O
medium Difficulty
Study Explanation
Chemistry
UTME / JAMB 1978
Acids, Bases, and Salts
Solution
If excess zinc is added to a bluish green solution of copper (II) sulphate, and the excess zinc filtered off after completion of reaction, a colourless solution is obtained because
A
both zinc and copper are metals
B
the sulphate radical and the zinc ion are divalent
C
zinc is more electropositive than copper
D
both zinc and copper form depositive ions in solution
E
zinc is a reducing agent
medium Difficulty
Study Explanation
Chemistry
UTME / JAMB 1978
Acids, Bases, and Salts
Solution
Three solutions contain carbonate, sulphate and sulphide ions respectively. One test that will identify just ONE of them completely is by addition to each of them of
A
barium chloride solution
B
dilute hydrochloric acid
C
lead nitrate solution
D
calcium chloride solution
E
sodium hydroxide solution
medium Difficulty
Study Explanation
Chemistry
UTME / JAMB 1978
Acids, Bases, and Salts
If hydrogen sulphide gas is passed into a solution of a pure iron chloride, a yellow deposit appears. If the deposit is filtered, a pale green solution is left behind. The pale green solution is
A
dilute sulphuric acid
B
dilute hydrochloric acid
C
unreacted hydrogen sulphide in water
D
iron (III) chloride
E
Iron (II) chloride
medium Difficulty
Study Explanation
Chemistry
UTME / JAMB 1978
Acids, Bases, and Salts
Which of the following changes is physical?
A
Adding iron filing to aerated water
B
Adding sodium metal to water
C
Cooling a solution of Iron (II) sulphate to obtain the hydrated salt
D
Cooling water to obtain ice
E
Burning the domestic gas (Utilgas) for cooking
medium Difficulty
Study Explanation