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An example of an amphoteric oxide is
The IUPAC nomenclature of the complex K\(_4\)Fe(CN)\(_6\) is
Hydrochloric acid is regarded as a strong acid because it
When a specie undergoes oxidation, its
An example of a substance that does not change directly from solid to gas when heated is
\(^{14}_7\)N + X → \(^{14}_6\)C + \(^1_1\)P
In the reaction above, X is
The substance that reacts with sodium to form alkali and changes white anhydrous copper(II) tetraoxosulphate (VI) to blue is
A major effect of oil pollution in coastal water is
The combustion of candle under limited supply of air forms
In the treatment of water for municipal supply, chlorine is used to
The scientist that performed the experiment on discharged tubes that led to the discovery of the cathode rays as a sub-atomic particle is
Determine the empirical formula of an oxide of sulphur containing 60% of oxygen
[S = 32, O = 16 ]
Fog is a colloid in which
The volume in cm\(^3\) of a 0.12 moldm\(^{-3}\) HCl required to completely neutralize a 20cm\(^3\) of 0.20 moldm\(^{-3}\) of NaOH is
Which of the following is an air pollutant?
Calculate the mass of Magnesium that will be liberated from its salt by the same quantity of electricity that liberated 16.0 g of Silver.
[Mg = 24.0, Ag = 108 ]
\(^{238}_{92}\)U + \(^1_0\)n → \(^{239}_{92}\)U
The process above produces
The shape of the molecule of Carbon(IV) oxide is
The salt formed when strong acid reacts with strong base is
When n = 3, the quantum number of an element is