TG EAMCET 3 May 2025 Shift 2 Paper

The hydrolysis of diborane (B2H6) gives boric acid (H3BO3) as the compound X. The reaction is
B2H6+6H2O⟶2H3BO3+6H2
The properties of boric acid are as follows.
Acidity : Boric acid is a weak monobasic Lewis acid. It does not donate protons but rather accepts a hydroxide ion from water, making it a monobasic acid. Therefore, statement II is correct, and statement I (tribasic acid) is incorrect.
Structure: In the solid state, boric acid has a layered structure, where planar BO3 units are linked by hydrogen bonds. This structure gives it a slippery feel. Therefore, statement III is correct.
Solubility: Boric acid has low solubility in cold water, although its solubility increases with temperature. It is not considered highly soluble. Therefore, statement IV is incorrect.
Based on the analysis, the correct statements about compound X are II and III.