1 percent composition of an organic compound A is carbon: 85.71% and hydrogen 14.20% . Its vapour density is 14. Consider the following reaction sequence Cl /H O (i) KCN/EtOH (ii) H O A B C → → Identify C (EAMCET 2009) (a) | CH CH CO H OH (b) HO CH CH CO H (c) HO CH CO H (d) CH CH CO H Ans. (b) Sol. First calculate the molecular formula of A from the given data : 85.71 7.14 C 85.71 7.14 7.14 14.29 14.29 H 14.29 14.29 7.14 Empirical formula CH Empirical formula mass Molecular mass of the compound V.D. 2 14 x x mol. mass empirical formula mass n Hence, molecular formula of the compound CH C H Reactions: