JEE Main202431 Jan 2024Evening ShiftChemistryp Block Elements (Group 13 & 14)Actual
Given below are two statements : Statement I: Group 13 trivalent halides get easily hydrolysed by water due to their covalent nature. Statement II: AlCl 3 upon hydrolysis in acidified aqueous solution forms octahedral Al H 2 O 6 3 + ion. In the light of the above statements, choose the correct answer from the options given below :
Options
- AStatement I is true but statement II is false
- BStatement I is false but statement II is true
- CBoth statement I and statement II are false
- DBoth statement I and statement II are true
Correct answer
D. Both statement I and statement II are true
Step-by-step solution
In trivalent state most of the 13th group compounds being covalent are hydrolysed in water. Trichlorides of group 13 on hydrolysis in water form tetrahedral M OH 4 − species, the hybridisation state of element M is sp 3 . In case of aluminium, acidified aqueous solution forms octahedral Al H 2 O 6 3 + ion, which has an aluminium as a central metal atom and water molecules as ligands. The aluminium is in + 3 oxidation state and forms 6 sp 3 d 2 hybrid orbitals. Hence option D is the answer.