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

Be and Al exhibit diagonal relationship. Which of the following statem

1.	Be and Al exhibit diagonal relationship. Which of the following statements about then is//are not true ? (i) Both react with HCl to liberate H_(2) (ii) They are made passive by HNO_(3) (iii) Their carbides gives acetylene on treatment with water (iv) Their oxides are amphoteric
Answer» (iii) and (IV) (i) and (iii) (i) only (iii) only Solution :The carbides of .Be. and .AL. liberates `CH_(4)` on treatment with water `Be_(2)C+4H_(2)O to 2Be (OH)_(2)+CH_(4)`, `Al_(4)C_(3)+6H_(2)Oto 2Al_(2)O_(3) +3CH_(4)`