An organic compound A on heating with concentrated `H_(2)SO_(4)` forms a compound B which on addition of one mole of hydrogen in presence of Ni forms a compounds C. One mole od compound C on combustion form two moles of `CO_(2)` and three moles of `H_(2)O`. Identify the compounds A,B and C write the chemical equation of the reactions involved.

Explanation

Since one mole of compound C on combustion forms tow moles of `CO_(2)` and three moles of `H_(2)O`, the compound C is a hydrocarbon with formula `C_(2)H_(6)`. It is ethane. The compound B which forms `C_(2)H_(6)` upon addition of hydrogen is ethene `(C_(2)H_(4))`. the organic compound A which forms ethene upon acidic dehydration is ethanol. The chemical equations for the reaction involved are:
`underset("Ethanol (A)")(C_(2)H_(5)OH)underset(heat)overset(H_(2)SO_(4))tounderset("Ethene (B)")(CH_(2)=CH_(2))underset(Heat)overset(H_(2)Ni)tounderset("Ethane (C)")(CH_(3)-CH_(3))" "underset((C))(C_(2)H_(6)+3O_(2))overset(("Combustion"))to2CO_(2)+3H_(2)O`