Question

Formation of carbon disulfide from carbon and sulfur takes place by

• A. absorption of heat
• B. evolution of heat
• C. no change of heat content
• D. None of these

Answer 1

The correct option is A

absorption of heat

Explanation:

• When Carbon ($\mathrm{C}$) in the form of charcoal and Sulfur ($\mathrm{S}$) in the form of vapor is heated at a high temperature, Carbon disulfide (${\mathrm{CS}}_2$) is formed.
• The chemical reaction:

$\mathrm{C}\left(\mathrm{charcoal}\right)+2\mathrm{S}\left(\mathrm{g}\right)\to {\mathrm{CS}}_2\left(\mathrm{l}\right)$

• Since Carbon and Sulfur are heated, absorption of heat takes place to form Carbon sulfide (${\mathrm{CS}}_2$). Since, energy is absorbed in the reaction thus, it is considered as an endothermic reaction.

Final answer:

Hence, option (A) is correct. The formation of carbon disulfide takes place by absorption of heat.