Be and Al exhibit diagonal relationship which of the following statements about them is /are not true ? (i) Both react with HCl to liberate H_(2). (ii) They are made passive by HNO_(3). (iii)Their carbides give acetylene on treatment with water . (iv) Their oxides are amphoteric .

Be and Al exhibit diagonal relationship which of the following stateme

1.	Be and Al exhibit diagonal relationship which of the following statements about them is /are not true ? (i) Both react with HCl to liberate H_(2). (ii) They are made passive by HNO_(3). (iii)Their carbides give acetylene on treatment with water . (iv) Their oxides are amphoteric .
Answer» (III) and (iv) (i) and (iii) (i) only (ii) and (iii) SOLUTION :Their carbides on treatment with `H_(2)O` gives methane . Aluminium CARBIDE also reacts with `H_(2)` to give methane . `Al_(4) C_(3) + 12 H_(2)O to 4 Al(OH)_(3) + 3 CH_(4)`