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The substance least considered as a source of environmental pollution is
25cm\(^3\) of a 0.2 mol dm\(^3\) solution of Na\(_2\)CO\(_3\) requires 20 cm\(^3\) of a solution of HCl for neutralization. The concentration of the HCl solution is
Three drops of a 1.0 mol dm-3 solution of NaOH are added to 20 cm3 of a solution of pH 8.4. The pH of the resulting solution will?
When a salt loses its water of crystallization to the atmosphere on exposure, the process is said to be
Tetraoxosulphate (VI) acid burns the skin by
The product of the electrolysis of dilute sodium hydroxide using platinum electrodes are
Cu\(_2\)S(s) + O\(_2\)(g) → 2CU(s) + SO\(_2\)(g)
What is the change in the oxidation number of copper in the reaction above?
When dissolved in water, NaOH flakes show
The Arrhenius equation expresses the relationship between the speed of a reaction and its
When H\(_2\)S is passed into a solution of iron (III) chloride, the solution turns
PCl5(g) ↔ PCl3(g) + Cl2(g)
In the reaction above, a decrease in pressure will
Which of the following equations show that a reaction is in equilibrium?
What amount of mercury would be liberated if the same quantity of electricity that liberates 0.65g of zinc is applied?
In the reaction E+F ↔ G+H, the backward reaction is favoured if the concentration of
The chromatography separation of ink is based on the ability of the components to
A little quantity of trichloromethane (b.pt 60\(^0\)C) was added to a large quantity of ethanol (b.pt 78\(^0\)C). The most probable boiling point of the resultant mixture is from
The formula CH\(_2\)O for ethanoic acid is regarded as its