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The reaction of an alkene with hydrogen in the presence of catalyst is
An example of element that can catenate is
Which of the following gives a precipitate when treated with NaOH solution?
Ethanol can easily be produced by
The gas that gives brown colouration in brown ring test is
Steam changes the colour of anhydrous cobalt (II) chloride from
The property which makes alcohol soluble in water is the
The furring of kettles is caused by the presence in the water of?
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