Chemistry - PERIODIC TABLE Question with Solution | TestHub

1)$\mathrm{B}(\mathrm{OH}{)}_3$acidic and${\mathrm{H}}_3{\mathrm{PO}}_3$acidic
2)$\mathrm{B}(\mathrm{OH}{)}_3$acidic and$\mathrm{Al}(\mathrm{OH}{)}_3$amphoteric
3)$\mathrm{NaOH}$basic and$\mathrm{Ca}(\mathrm{OH}{)}_2$basic
4)$\mathrm{Be}(\mathrm{OH}{)}_2$amphoteric and$\mathrm{Al}(\mathrm{OH}{)}_3$amphoteric