Question

Which is true for an element present in group 13 of the periodic table?

• A. It is gas at room temperature.
• B. It has oxidation state of 4+.
• C. It forms $R_2{O}_3$.
• D. If forms $R{X}_2$.

Answer 1

The correct option is C It forms $R_2{O}_3$.

Group 13 of the periodic table are

A) Solids at room temperature.Examples:B,Al etc.

B) It has oxidation state of +3(as they have three valence electrons in outermost shell).

C) It forms $R_2{O}_3$.True

D) If forms $R{X}_3$ and If forms $R_2{X}_6$

So only option C is correct