Question

С2h6-c2h4-c2h2-c6h6-c2h5cl-c6h5oh

Answer 1

C2H6-->C2H4+H2
C2H4-->C2H2+H2
3C2H2-->C6H6
C6H6+CL2-->C6H5CL+HCL
C6H5CL+NaOH-->C6H5OH+NaCL

Answer 2

The sequence you provided appears to represent a series of chemical compounds. Each abbreviation corresponds to a specific molecule. Here's the expanded form of each abbreviation:

C2H6 - Ethane C2H4 - Ethene (also known as Ethylene) C2H2 - Ethyne (also known as Acetylene) C6H6 - Benzene C2H5Cl - Chloroethane (Ethyl chloride) C6H5OH - Phenol

These are hydrocarbons and a couple of functionalized compounds (chloroethane and phenol). If you have any specific questions about these compounds or need further information about their properties or reactions, feel free to ask!