The preferential discharge of ions during electrolysis is influenced by the
mechanism of electrolysis
electrolytic reactions
nature of the electrode
type of electrolytic cell
Correct answer is C
The preferential discharge of ions is influenced by:
- The position of the ions in the electrochemical series
- The concentration of the ions in the electrolyte
- The nature of the electrode
propane
propanoic acid
propyne
propanol
Correct answer is C
Thus bromine water will be decolorized by alkynes due to the presence of two pi bonds available for reaction!
When a salt is added to its saturated solution, the salt
dissolves and the solution becomes super saturated
dissolves and the solution becomes unsaturated
precipitates and the solution remains unchanged
dissolves and crystals are formed
Correct answer is C
The point of saturation is the point it gets to and from thence, the solution can no longer take in the salt anymore. From this point, it begins to form precipitate while the solution remains unchanged.
At what temperature does the solubility of \(KNO_{3}\) equal that of \(NaNO_{3}\)?
0°C
20°C
30°C
40°C
Correct answer is B
From the graph, check for their point of intersection and trace it down to the temperature axis.
Pure water can be made to boil at a temperature lower than 100°C by
reducing its quantity
decreasing the external pressure
distilling it
increasing the external pressure
Correct answer is B
The easiest and most drastic way to change the boiling point is by tampering with the pressure above your water. To lower the boiling point, you need simply to decrease its external pressure.
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