Group–13 elements react with \( O_2 \) in amorphous form to form oxides of type \( M_2O_3 \) (M = element). Which among the following is the most basic oxide?
Tl2O3
Tl2O2
Cr2O3
B2O3
The Correct Option is B
Approach Solution - 1
Tl+ oxide is more basic than \(Tl_3\)+ \(Cr_2O_3\) is amphoteric.
Approach Solution -2
Out of Tl2O3 and Tl2O2, Tl2O2 is expected to be more basic because it has a higher oxidation state of +1 for Tl as compared to +3 in Tl2O3. Higher oxidation state of the metal in an oxide generally leads to a more basic oxide.
Therefore, Tl2O2 is the most basic among the given options.
Answer. B
Approach Solution -3
As electropositive character increases, basic character of oxide increases: \[ B_2O_3 < Al_2O_3 < Ga_2O_3 < In_2O_3 < Tl_2O_3 \] % Correct Answer Correct Answer:} (4) B\(_2\)O\(_3\)
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Concepts Used:
Amines - Chemical Properties
There are many chemical properties of amines.
The primary and secondary amines, including several amine derivatives, have a direct impact on their properties due to the presence of hydrogen bonding. The compounds containing phosphorus have a lower boiling point and the compounds containing amines and alcohol have a higher boiling point. The structure of alkanols is immensely similar to that of amine except the presence of the hydroxyl group. In such a case, oxygen has a higher electronegativity than that of nitrogen, so alkanol compounds are more acidic in nature in comparison to the amines.
On account of the ability to form hydrogen bonds, the amines have tendencies of high solubility in water. The amine molecules such as Ethyl, diethyl, triethyl, and Methyl are gaseous in nature. Whereas, higher weight amines have a solid structure and alkyl amines have a liquid structure. There is an ammonia smell to gaseous amines and a fishy smell to liquid amines. The solubility of amines entirely depends upon the number of carbon atoms in the molecule.