Question

Be and Al exhibit diagonal relationship. Which of the following statement/s about them is/are false?
1. Both react with HCl to liberate $H_2$
2. They are made passive by $HN{O}_3$
3. Their carbides give acetylene on treatment with water.
4. Their oxides are amphoteric.

• A. 3 and 4
• B. 1 and 2
• C. 1 only
• D. 3 only

Answer 1

The correct option is D

3 only

The carbides of both Be and Al liberate methane on treatment with water.
$B{e}_{2}C+2H_{2}O\to 2BeO+C{H}_4$

$A{l}_4{C}_3+6H_{2}O\to 2A{l}_2{O}_3+3C{H}_4$