Question

Which of the following statements is true about element R present in ${13}^{th}$ group 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. It forms $R{X}_2$.

Answer 1

The correct option is C

It forms $R_2{O}_3$.

Group 13 elements belong to the boron family. The oxidation state of group 13 elements is either +1 or +3. All the group 13 elements are solids at room temperature. Valency of element R present in ${13}^{th}$ group of the periodic table is 3. Hence it can form $R_2{O}_3$ when it reacts with oxygen.