• question_answer                         In which of the following compounds, the weight percentage of C and H are 80 and 20 respectively? A) ${{C}_{2}}{{H}_{6}}$                 B) $C{{H}_{4}}$         C)   ${{C}_{6}}{{H}_{6}}$     D)   ${{C}_{2}}{{H}_{3}}$

For ${{C}_{2}}{{H}_{6}},$the total gram molecular weight =30 g Out of $30\,g\to 26\,g$of carbon weight, i.e., 80 per cer Same as out of $30\,g\to 6g\,{{H}_{2}}$ weight, i.e., 20 per cent. Hence, the correct option is (a).