99 Percentile Qs Bank for JEE MainChemistryp Block Elements (Group 13 & 14)
Which is true for an element X present in the 13 th group of the periodic table?
Options
- AIt is a gas at room temperature.
- BIt has oxidation state of + 4 .
- CIt forms an oxide of formula X 2 O 3 .
- DIt forms a chloride of formula XCl 2 .
Correct answer
C. It forms an oxide of formula X 2 O 3 .
Step-by-step solution
The elements of group - 13 of the periodic table are solids (examples: B ,   Al , etc.) at room temperature. They have a common oxidation state of + 3 (as they have three valence electrons in the outermost shell). So, they form an oxide of formula X 2 O 3 from the ions X 3 + and O 2 - . It forms a metal chloride of formula XCl 3 and dimer X 2 Cl 6 as the octet state, which accounts for stability is not fulfilled for the metal in the monomer.