Question

The acidic nature of oxides of group 13 increases d
down the graph

Answer 1

Answer:

Acidic nature of oxides is directly proportional to their ability of donating protons.Since the electropositivity decreases down the group,the ability to donate protons also increases.

Hence the acidic nature increases down the Group in Periodic table.

Answer 2

The acidic nature of oxides of group 13 increases down the graph- It is false it decreases down the group .

Explanation:

Group -13  

This group includes elements that is :

• Boron  (B)
• Aluminum (Al)
• Gallium (Ga)
• Indium(In)
• Thallium  (Tl)

General electronic confugration of this group : ns²np¹.

1.Reactivity towards oxygen : form oxides  

Boron do not react with oxygen at ordinary temperature due to small size and high ionization energies.

If we react Al with oxygen it react at normal temperature but with time it forms  a protective layer of oxide on its surface which renders it non reactive .

               Al + 3O₂  -->    2Al₂O₃

They react with nitrogen also to form compound of formula EN

               Example : 6Al + 3N₂  -->     6AlN

If we see acidic strength of oxides so,it decreases down the group .

                    BeO                 Al₂O₃              GaO                InO                    TlO

                (acidic)           (amphoteric)                (all are basic)