When air is passed through alkaline pyrogallol and then l...
When air is passed through alkaline pyrogallol and then lime water, the gases left are
nitrogen and carbon (IV) oxide
nitrogen and noble gases
nitrogen and oxygen
nitrogen, carbon (VI) oxide and noble gases
the noble gases
Correct answer is B
No explanation has been provided for this answer.
Permanent hardness of water can be removed by? ...
An element with the electron configuration of 1s 22s 22p 6 would have a combining power of...
In electrovalency, the oxidation number of the participating metal is always ...
Tetraoxosulphate (lV) acid is described as strong acid because it is highly ...
In general, an increase in temperature increases the solubility of a solute in water because? ...
The nucleus of the isotopes tritium,contains ...
An example of a hygroscopic substance is ...
The collision theory explains reaction rates in terms of ...