Which of the following metals cannot replace hydrogen from water or steam?
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2018
The conductivity of an acid solution depends on the
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2018
Which of these sources of water may likely contain the least concentration of Ca\(^{2+}\) and Mg\(^{2+}\)?
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2018
Aluminium does not react with either dilute or concentrated trioxonitrate (V) acid because
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2018
The presence of ammonia gas in a desiccator can exclusively be removed by
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2018
The collision theory explains reaction rates in terms of
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2018
The end products of burning a candle in the atmosphere are water and
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2018
2SO\(_2\) \(_{(g) }\)+ O\(_2\) \(_{(g) }\) ↔ 2SO\(_3\)\(_{(g) }\) ΔH = -395.7kJmol\(^{-1}\)In the equation, an increase in temperature will shift the equilibrium position to the
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2018
From the graph above, it may be concluded that
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2018
The hydrogen ion concentration of a sample of orange juice is \(2.0 \times 10^{-11}\) moldm\(^{-3}\). What is its p\(^{\text{OH}}\)? \(\log 10^2 = 0.3010\)
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2018
An element X forms the following compounds with chlorine; XCl\(_4\), XCl\(_3\), XCl\(_2\). This illustrates the
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2018
The knowledge of half-life can be used to
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2018
The figure above shows the electrolysis of molten sodium chloride. Z is the
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2018
Which of the following produces relatively few ions in solution?
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2018
At what temperature is the solubility of potassium trioxonitrate(V ) equal to that of sodium trioxonitrate (V)?
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2018
The choice of method for extracting a metal from its ores depends on the
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2018
Calculate the pH of 0.05 moldm\(^{-3}\) H\(_2\)SO\(_4\)
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2018
What mass of Cu would be produced by the cathodic reduction of Cu\(^{2+}\) when 1.60A of current passes through a solution of CuSO\(_4\) for 1 hour. (F=96500Cmol\(^{-1}\) , Cu=64)
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2018
The solubility of the solids that dissolves in a given solvent with the liberation of heat will