With a suitable example write equations for the Williamsons ether synthesis.

Explanation

Williamsons ether synthesis :
`to` This method is used for the preparation of symmetrical and unsymmetrical ethers.
`to` The reaction of an alkyl halide with sodium alkoxide to form ethers is known as Williamson's Synthesis .
`R-X+R'-underset(* *)overset( * *)O Na to R -underset(* *)overset(* *)O-R'+NaX`
E.g. : `C_(2)H_(5)Cl + CH_(3)ONa to underset("Methyl ethyl ether")(CH_(3)-O-CH_(2)CH_(3)+NaCl)`
`(CH_(3))_(3)-C-ONa+CH_(3)-Br to CH_(3)-O-C-(CH_(3))_(3)+NaBr`