Question

Which is true for an element $R$ present in III group of the periodic table.

• A. It is gas at room temperature
• B. It has oxidation state of $+ 4$
• C. It forms $\mathrm { R } _ { 2 } \mathrm { O } _ { 3 }$
• D. It forms $R X _ { 2 }$

Answer 1

Answer: (C)

It forms $\mathrm { R } _ { 2 } \mathrm { O } _ { 3 }$

Answer 2

Al → III group → Forms $\mathrm { Al } _ { 2 } \mathrm { O } _ { 3 }$.