Question

Benzene reacts with chlorine to form benzene hex chloride in presence of

• A. nickel
• B. $AlC{l}_3$
• C. bright sunlight
• D. zinc

Answer 1

Answer: (C)

$C_6{H}_6+3C{l}_2\underset{\text{or bright sun light}}{\overset{\text{Sun light}}{\to }}\underset{(BHC)or}{C_6{H}_{6}C{l}_6}$
$666$ or lindane $C_6{H}_{6}C{l}_6$ is benzene hex chloride or $666$ , a well known insecticides. It exists in eight isomeric crystalline forms namely $\alpha ,\beta ,\gamma$ etc. Out of these $\gamma$-isomer is most effective and used as insecticide under the name of gammaxene or lindane.