The only element of group 13 which does not form a passive layer on the surface while dissolving in con. $H N O_{3}$ , but dissolve to form complex is:
boron
both
aluminium
none

Question

The only element of group 13 which does not form a passive layer on the surface while dissolving in con- HNO-3- but dissolve to form complex is-boronbothaluminiumnone

Toppr Admin · Accepted Answer

Boron does not usually react with acids and alkalis but it reacts with acids and alkalis in only highly divided state- When it reacts with HNO3 it gives Boric acid- The reaction occurs at high temperature-xA0-B-3HNO3-x27F6-H3BO3-3NO2 which is complex in nature-

The only element of group 13 which does not form a passive layer on the surface while dissolving in con. HNO3, but dissolve to form complex is:boronbothaluminiumnone

Boron does not usually react with acids and alkalis but it reacts with acids and alkalis in only highly divided state. When it reacts with HNO3 it gives Boric acid. The reaction occurs at high temperature. B+3HNO3⟶H3BO3+3NO2 which is complex in nature.

The only element of group 13 which does not form a passive layer on the surface while dissolving in con. $H N O_{3}$ , but dissolve to form complex is:
boron
both
aluminium
none

Boron does not usually react with acids and alkalis but it reacts with acids and alkalis in only highly divided state. When it reacts with $H N O_{3}$ it gives Boric acid. The reaction occurs at high temperature.
$B + 3 H N O_{3} ⟶ H_{3} {B O}_{3} + 3 {N O}_{2}$ which is complex in nature.