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Elements P, Q, R, S have 6, 11, 15, 17 electrons respectively, therefore,
Which of the following metals cannot replace hydrogen from water or steam?
The conductivity of an acid solution depends on the
Which of these sources of water may likely contain the least concentration of Ca\(^{2+}\) and Mg\(^{2+}\)?
Aluminium does not react with either dilute or concentrated trioxonitrate (V) acid because
The presence of ammonia gas in a desiccator can exclusively be removed by
The collision theory explains reaction rates in terms of
The end products of burning a candle in the atmosphere are water and
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
The hydrogen ion concentration of a sample of orange juice is 2.0 X 10\(^{-11}\)moldm\(^{-3}\). What is its p\(^{OH}\)? [log102 = 0.3010]
An element X forms the following compounds with chlorine; XCl\(_4\), XCl\(_3\), XCl\(_2\). This illustrates the
The knowledge of half-life can be used to
The figure above shows the electrolysis of molten sodium chloride. Z is the
Which of the following produces relatively few ions in solution?
The choice of method for extracting a metal from its ores depends on the
Calculate the pH of 0.05 moldm\(^{-3}\) H\(_2\)SO\(_4\)
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)
The solubility of the solids that dissolves in a given solvent with the liberation of heat will
The constituent common to duralumin and alnico is
The reaction between an organic acid and an alcohol in the presence of an acid catalyst is known as;