A carbon compound on heating with excess cond. H_(2)SO_(4) forms another carbon compound 'Q' which on addition of hydrogen in the presence of nickel catalyst forms a saturated carbon compound 'R' One molecule of R on combustion forms two molecules of carbon dioxide and three molecules of water. Identify P, Q and R and write chemical equations for the reactions involved.

A carbon compound on heating with excess cond. H_(2)SO_(4) forms anoth

1.	A carbon compound on heating with excess cond. H_(2)SO_(4) forms another carbon compound 'Q' which on addition of hydrogen in the presence of nickel catalyst forms a saturated carbon compound 'R' One molecule of R on combustion forms two molecules of carbon dioxide and three molecules of water. Identify P, Q and R and write chemical equations for the reactions involved.
Answer» Solution :`P = "Ethanov"//C_(2)H_(5)OH Q = "Ethene"//CH_(2) = CH_(2), R = "Ethane"//C_(2)H_(6)` `UNDERSET"ETHANOL"(C_(2)H_(5)OH)OVERSET("Conc"H_(2)SO_(4))underset"443K"rightarrowunderset"Ethene"(CH_(2)=C)H_(2)+H_(2)O` `CH_(2)=CH_(2)overset"NICKEL catalyst"underset(H_(2))rightarrowunderset"Ethene"(CH_(3))-CH_(3)//C_(2)H_(6)` `C_(2)H_(6)//CH_(3)-CH_(3)+7/2O_(2)2CO_(2)+3H_(2)O`