Question

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) only
D. (iii) only

Answer 1

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)`