Which of the following statements is/are correct for group 13 elements ?
A. Al reacts with dil. HCl to liberate `H_(2)` gas
B. Al reacts with conc. `HNO_(3)` to liberate `H_(2)` gas
C. Boron reacts with only acids to liberate `H_(2)` gas
D. Anhydrous `AlCl_(3)` reacts with moisture to liberate `H_(2)` gas

Options

A. B, C, D
B. A, B, D
C. A, C
D. A

Answer

D

Explanation

A. When Al reacts with dil. HCl, it liberates `H_(2)` gas.
`2Al+6HCl("dil.")rarr 2AlCl_(3)+3H_(2)`
B. When Al reacts with conc. `HNO_(3)` than it liberates NO gas.
`Al +4HNO_(3)(conc.)rarrAl(NO_(3))_(3)+NO+2H_(2)O`
C. Crystalline boron does not react with boiling HCl, HF, HI etc.
D. `AlCl_(3)` reacts with moisture and form aluminium hydroxide.
`AlCl_(3)+3H_(2)OrarrAl(OH)_(3)+3HCl`
Hence, option (d) is correct.