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) Theey are made passive by `HNO_(3)`. (iii) Their carbides give acetylene on treatment with water. (iv) Their oxides are amphoteric.A. (iii) and (iv)B. (i) and (iii)C. (i) onlyD. (iii) only

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

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) Theey are made passive by `HNO_(3)`. (iii) Their carbides give acetylene on treatment with water. (iv) Their oxides are amphoteric.A. (iii) and (iv)B. (i) and (iii)C. (i) onlyD. (iii) only
Answer» Correct Answer - D The carbides of both Be and Al liberate methane with water. `Be_(2)C+2H_(2)O to 2BeO+CH_(4)` `Al_(4)C_(3)+6H_(2)O to 2Al_(2)O_(3)+3CH_(4)`

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