Question

Which of the following is a formula of methanides : (a) $B{e}_{2}C$ (b) $Ca{C}_2$ (c) $M{g}_2{C}_3$ (d) $A{l}_4{C}_3$.

• A. Only $a,d$
• B. Only $a,b$
• C. Only $c,d$
• D. Only $b,d$

Answer 1

The correct option is A Only $a,d$

$B{e}_{2}C+4H_{2}O\to 2Be(OH{)}_2+C{H}_4$
$Ca{C}_2+2H_{2}O\to Ca(OH{)}_2+C_2{H}_2$
$M{g}_2{C}_3+4H_{2}O\to 2Mg(OH{)}_2+C_3{H}_4$
$SiC+H_{2}O\stackrel{above{1300}^{\circ }Ctemp.}{\to }Si{O}_2+C{H}_4$.