Question

A carbon compound p on heating with excess conc. 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 1

p-Ethanol-CH3CH2OH
q-ethene-CH2=CH2
r-ethane-CH3-CH3

CH3CH2OH=>CH2=CH2+H2O

CH2=CH2+H2=>CH3-CH3

2CH3-CH3+7O2=>4CO2+6H2O