1.

Give industrial preparation method of ethyne.

Answer»

Solution :(i) Quick lime can be obtained by heating limstone as shown in the following reactions :
`underset("Limestone")(CaCO_(3(s))) overset(Delta)rarr underset("Lime")(CaO_((s))) + CO_(2(G))`
(ii) Now heating calcium oxide with coke, calcium carbide and carbon monoxide are obtained.
`underset("Quick lime")(CaO) + 3C underset(Delta)overset("Closed furnace")rarr underset("Calcium carbide")(CaC_(2)) + CO`
(III) By reaction of calcium carbide with water, ethyne is obtained as follows.
`underset("carbide")underset("Calcium")(CaC_(2))+underset("Water")(2H_(2)O)rarr underset("hydroxide")underset("Calcium")(Ca(OH)_(2)) + underset("Ethyne")(C_(2)H_(2))`
By this way ethyne is PRODUCED in INDUSTRIES.


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