1986
Using the usual acidic, neutral or alkaline behaviour of salt solutions in pure water at 25°C, which salt-and-pH pairing is incorrect?
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1986 JAMB UTME Chemistry Past Questions
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1986
20 cm3 of 1.0 molar NH4OH solution when neutralized with 20.05cm3 of 0.1 molar HCl liberated -102 joules of heat. Calculate the heat of neutralization of NH4OH?
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1986
Which of these represents a redox reaction?
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1986
How many coulombs of electricity are passed through a solution in which 6.5 amperes are allowed to run for 1.0 hour?
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1986
Which of the following solutions will conduct the least amount of electricity?
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1986
Which of the following is an acidic salt?
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1986
The exhaust fumes from a garage in a place that uses petrol of high sulphur content are bound to contain?
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1986
When steam is passed through red hot carbon, which of the following are produced?
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1986
The reaction Mg + H2O → MgO + H2 takes place only in the presence of?
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1986
The approximate volume of air containing 10cm3 of oxygen is?
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1986
What happens to the equilibrium ZnO(s) + H2(g) ⇌ Zn(s) + H2O(l) when the system is compressed at constant temperature?
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1986
In standard qualitative analysis of freshly precipitated sulphides, which listed sulphide remains undissolved in dilute, non-oxidising hydrochloric acid?
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1986
Which of the following metals does NOT form a stable trioxocarbonate (IV)?
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1986
In an experiment, gas X turned wet lead ethanoate paper black and gas Y bleached moist litmus paper. Which listed pair of elements matches both observations, for X and Y respectively?
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1986
Under suitable ordinary oxidation conditions, which pair contains two oxides that can each react with oxygen to form a higher common oxide?
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1986
Oxygen-demanding waste are considered to be a water pollutant because they?
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1986
The iron (III) oxide impurity in bauxite can be removed by?
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1986
What are the values of x, y and z respectively in the equation: xCu + yHNO3 → xCu(NO3)2 + 4H2O + zNO?
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1986
Ammonia gas is normally dried with?
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1986
A substance Z reacts with NaOH to give salt and water only. When Z is treated with dilute HCl, a gas is evolved which gives a yellow suspension on passing into concentrated H2SO4. Substance Z is?
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