Question

An equimolar mixture of aluminium carbide and calcium carbide is reacted with sufficient water. A mixture of gases A and B is obtained
$B\underset{873K}{\overset{\text{hot Fe tube}}{\to }}C$
$A+C{l}_2\left(\text{limiting}\right)\to D$
$C+D\stackrel{\text{Anhyd.}AlC{l}_3}{\to }E$
The correct statement(s) among the following is/are:

• A. A and B are equimolar in gaseous mixture
• B. D is obtained by nucleophilic substitution
• C. E decolourises $KMn{O}_4$ solution
• D. C has 4 degrees of unsaturation

Answer 1

Answer: (C), (D)

The correct options are
C E decolourises $KMn{O}_4$ solution
D C has 4 degrees of unsaturation

$A{l}_4{C}_3+12H_{2}O\to 4Al(OH{)}_3+\underset{\left(A\right)}{3C{H}_4}\uparrow$

$Ca{C}_2+2H_{2}O\to Ca(OH{)}_2+\underset{\left(B\right)}{C_2{H}_2}\uparrow$

$\underset{\left(B\right)}{3C_2{H}_2}\underset{873K}{\overset{\text{hot Fe tube}}{\to }}\underset{\left(C\right)}{\text{Benzene}}$

$\underset{\left(A\right)}{3C{H}_4}+C{l}_2\left(\text{limiting}\right)\to \underset{\left(D\right)}{C{H}_{3}Cl}$

$\underset{\left(C\right)}{\text{Benzene}}+\underset{\left(D\right)}{C{H}_{3}Cl}\stackrel{\text{Anhyd.}AlC{l}_3}{\to }\underset{\left(E\right)}{\text{Toluene}}$