The reaction sequence you have provided is the conversion of calcium carbide (CaC2) to phenol (C6H5OH) through a series of chemical reactions. Here is a brief explanation of each step:

CaC2 (calcium carbide) is reacted with water to produce acetylene gas (C2H2) and calcium hydroxide. The reaction can be represented as:
CaC2 + 2H2O -> C2H2 + Ca(OH)2

Acetylene gas (C2H2) can undergo a series of reactions to form benzene (C6H6). This process typically involves cyclization and hydrogenation reactions.

Benzene (C6H6) can then be chlorinated to form chlorobenzene (C6H5Cl) in the presence of a chlorine source and a catalyst.

Lastly, chlorobenzene (C6H5Cl) can be hydrolyzed to produce phenol (C6H5OH) in the presence of a strong base like sodium hydroxide (NaOH).

Overall, this reaction sequence involves multiple steps to convert calcium carbide to phenol through intermediate compounds like acetylene, benzene, and chlorobenzene.